This document discusses multithreading and concurrency in .NET. It covers key concepts like processes and threads, and how they relate on an operating system level. It also discusses the Thread Pool, Task Parallel Library (TPL), Tasks, Parallel LINQ (PLINQ), and asynchronous programming patterns in .NET like async/await. Examples are provided for common threading techniques like producer/consumer and using the Timer class. Overall it serves as a comprehensive overview of multithreading and concurrency primitives available in the .NET framework.
This document discusses various thread synchronization constructs in .NET. It begins with an overview of threads and multithreading concepts. It then covers challenges in sharing data between threads and ensuring thread safety. The document proceeds to explain common synchronization constructs like locks, mutexes, semaphores, and event wait handles. It also discusses atomic interlocked operations and hybrid constructs like concurrent collections. Examples are provided for many of the synchronization primitives.
The Scanner class in Java simplifies console input by parsing input into tokens using delimiters. It can read input from various sources like files, strings, and streams. Scanner objects are constructed by passing the input source, and tokens can be read using type-specific next methods like nextInt() or by pattern matching. InputMismatchExceptions may be thrown if the next token does not match the expected type.
This document discusses C# threads and threading concepts in 3 paragraphs:
C# threads are managed by the System.Threading.Thread class and are passed a function using a ThreadStart delegate. Threads can be started and have properties like IsBackground that indicate their state.
When threads share resources, synchronization is needed to serialize access. The C# lock statement can be used to synchronize access to shared resources like queues. Other synchronization primitives like Monitor, Interlocked, and ReaderWriterLock are also available.
User interface threads in Windows Forms are separate from worker threads that do background processing. Worker threads must communicate with UI threads using Form methods like Invoke, BeginInvoke, and EndInvoke
This document discusses using a Scanner object in Java to read input from the user. It explains that System.in represents standard input and can be passed to a new Scanner object. Various Scanner methods like nextInt(), nextDouble(), and nextLine() allow retrieving input as different data types. The document provides examples of creating a Scanner, importing it, and using methods like nextInt() and nextLine() to read integer and string user input. It emphasizes the importance of prompts to indicate what type of data the user should enter.
This document provides an overview of threading concepts in .NET, including:
1) Threads allow concurrent execution within a process and each thread has its own call stack. The CLR uses thread pools to improve efficiency of asynchronous operations.
2) Thread synchronization is required when threads access shared resources to prevent race conditions and deadlocks. The .NET framework provides classes like Monitor, Lock, and Interlocked for thread synchronization.
3) Limiting threads improves performance on single-CPU systems due to reduced context switching overhead.
This document discusses multithreading in C#. It introduces threads and multithreading, describing how operating systems allow multitasking and how threads work. It explains that the .NET Framework supports multithreading using the System.Threading namespace and Thread class. It describes properties and methods of the Thread class, potential problems like deadlocks that can occur with multithreading, and solutions like synchronization and locking to prevent issues.
This document discusses multithreading and concurrency in .NET. It covers key concepts like processes and threads, and how they relate on an operating system level. It also discusses the Thread Pool, Task Parallel Library (TPL), Tasks, Parallel LINQ (PLINQ), and asynchronous programming patterns in .NET like async/await. Examples are provided for common threading techniques like producer/consumer and using the Timer class. Overall it serves as a comprehensive overview of multithreading and concurrency primitives available in the .NET framework.
This document discusses various thread synchronization constructs in .NET. It begins with an overview of threads and multithreading concepts. It then covers challenges in sharing data between threads and ensuring thread safety. The document proceeds to explain common synchronization constructs like locks, mutexes, semaphores, and event wait handles. It also discusses atomic interlocked operations and hybrid constructs like concurrent collections. Examples are provided for many of the synchronization primitives.
The Scanner class in Java simplifies console input by parsing input into tokens using delimiters. It can read input from various sources like files, strings, and streams. Scanner objects are constructed by passing the input source, and tokens can be read using type-specific next methods like nextInt() or by pattern matching. InputMismatchExceptions may be thrown if the next token does not match the expected type.
This document discusses C# threads and threading concepts in 3 paragraphs:
C# threads are managed by the System.Threading.Thread class and are passed a function using a ThreadStart delegate. Threads can be started and have properties like IsBackground that indicate their state.
When threads share resources, synchronization is needed to serialize access. The C# lock statement can be used to synchronize access to shared resources like queues. Other synchronization primitives like Monitor, Interlocked, and ReaderWriterLock are also available.
User interface threads in Windows Forms are separate from worker threads that do background processing. Worker threads must communicate with UI threads using Form methods like Invoke, BeginInvoke, and EndInvoke
This document discusses using a Scanner object in Java to read input from the user. It explains that System.in represents standard input and can be passed to a new Scanner object. Various Scanner methods like nextInt(), nextDouble(), and nextLine() allow retrieving input as different data types. The document provides examples of creating a Scanner, importing it, and using methods like nextInt() and nextLine() to read integer and string user input. It emphasizes the importance of prompts to indicate what type of data the user should enter.
This document provides an overview of threading concepts in .NET, including:
1) Threads allow concurrent execution within a process and each thread has its own call stack. The CLR uses thread pools to improve efficiency of asynchronous operations.
2) Thread synchronization is required when threads access shared resources to prevent race conditions and deadlocks. The .NET framework provides classes like Monitor, Lock, and Interlocked for thread synchronization.
3) Limiting threads improves performance on single-CPU systems due to reduced context switching overhead.
This document discusses multithreading in C#. It introduces threads and multithreading, describing how operating systems allow multitasking and how threads work. It explains that the .NET Framework supports multithreading using the System.Threading namespace and Thread class. It describes properties and methods of the Thread class, potential problems like deadlocks that can occur with multithreading, and solutions like synchronization and locking to prevent issues.
This document discusses Java's Fork Join framework for parallel processing on multicore systems. It introduces the history of single-core versus multicore processing. The Fork Join framework allows dividing problems into smaller sub-problems ("forking") that can execute concurrently on different cores, with the ability to join results together. It uses a ForkJoinPool that implements work-stealing to efficiently schedule many small tasks across available cores. Examples include summing the elements of an array in parallel.
The fork/join framework, which is based on the ForkJoinPool class, is an implementation of the Executor interface. It is designed to efficiently run a large number of tasks using a pool of worker threads. A work-stealing technique is used to keep all the worker threads busy, to take full advantage of multiple processors
Coroutines are Kotlin's solution for concurrency and allow doing something else while waiting for results. They avoid issues with threading like memory usage and bottlenecks. Coroutines use suspending functions to pause execution and switch to other coroutines. They can be cancelled, have timeouts set, and structured hierarchically with jobs. Common coroutine patterns include producers that return values on channels and actors that receive messages on inbound channels. Coroutines are backed by event loops and may require yield() if CPU bound to allow other coroutines to run.
This document discusses new features in Visual Studio 2010 and .NET Framework 4. It provides an overview of improvements to the .NET Framework including numerics, data structures, I/O, and a unified cancellation model. It also describes goals of the CLR 4 such as better integration, performance, and reliability through features like in-process side-by-side loading, the dynamic language runtime, parallel extensions, and code contracts for debugging. The workshop will examine these new capabilities in the .NET Framework 4.
"WTF is Twisted? (or; owl amongst the ponies)" is a talk that introduces the Twisted asynchronous programming framework, how it works, and what uses it.
Threads And Synchronization in C#
Concept about Threads And Synchronization in C#
it will help you about this concept
feel free
Download free programming applications on
http://www.androidapplications.xyz
The document discusses input and output streams in Java. It describes the BufferedReader class, which reads text from a character input stream and buffers it for efficient reading. It also discusses the Scanner class in Java's util package for reading user input through the keyboard. An example program is provided that uses Scanner to read integer and float values from the user and calculate their sum.
This session was presented at the JFall 2011 conference in The Netherlands. It introduces the Fork/Join framework that was introduced in Java 7. Example code can be found at http://bit.y/jfall-forkjoin
This document discusses .NET multi-threading concepts including blocking, locking, signaling, and non-blocking techniques. It provides code examples for managing threads using techniques like Join, lock, Mutex, and EventWaitHandle. It also covers thread pools, common problems like race conditions and deadlocks, and proven practices for safe multi-threaded programming.
Introduction to JDK7's Fork/Join framework. Present on May 3 2012 at the Belgian Java User Group (BeJUG). For more information see: http://www.bejug.org/confluenceBeJUG/display/BeJUG/ForkJoin+and+Akka
Demo code can be found at http://bit.ly/bejug-fj
This document provides an overview of multithreading concepts including when to use threads, threading primitives like mutexes and semaphores, common issues like race conditions and deadlocks, and alternatives to using threads. Key topics covered include GUI responsiveness, utilizing all processors, network connectivity, atomic functions, mutual exclusion, events and conditions, and memory barriers.
Adam Sitnik "State of the .NET Performance"Yulia Tsisyk
MSK DOT NET #5
2016-12-07
In this talk Adam will describe how latest changes in.NET are affecting performance.
Adam wants to go through:
C# 7: ref locals and ref returns, ValueTuples.
.NET Core: Spans, Buffers, ValueTasks
And how all of these things help build zero-copy streams aka Channels/Pipelines which are going to be a game changer in the next year.
Exploiting Multicore CPUs Now: Scalability and Reliability for Off-the-shelf ...Emery Berger
Multiple core CPUs are here. Conventional wisdom holds that, to take best advantage of these processors, we now need to rewrite sequential applications to make them multithreaded. Because of the difficulty of programming correct and efficient multithreaded applications (e.g., race conditions, deadlocks, and scalability bottlenecks), this is a major challenge.
This talk presents two alternative approaches that bring the power of multiple cores to today's software. The first approach focuses on building highly-concurrent client-server applications from legacy code. I present a system called Flux that allows users to take unmodified off-the-shelf *sequential* C and C++ code and build concurrent applications. The Flux compiler combines the Flux program and the sequential code to generate a deadlock-free, high-concurrency server. Flux also generates discrete event simulators that accurately predict actual server performance under load. While the Flux language was initially targeted at servers, we have found it to be a useful abstraction for sensor networks, and I will briefly talk about our use of an energy-aware variant of Flux in a deployment on the backs of endangered turtles. The second approach uses the extra processing power of multicore CPUs to make legacy C/C++ applications more reliable. I present a system called DieHard that uses randomization and replication to transparently harden programs against a wide range of errors, including buffer overflows and dangling pointers. Instead of crashing or running amok, DieHard lets programs continue to run correctly in the face of memory errors with high probability. This is joint work with Brendan Burns, Kevin Grimaldi, Alex Kostadinov, Jacob Sorber, and Mark Corner (University of Massachusetts Amherst), and Ben Zorn (Microsoft Research).
This talk was given in ilJUG on the 29th of July 2014 and discusses the new Java8 StampedLock class. It compares it to different locking mechanism is Java and shows some insights deduced from a simple benchmark
The document summarizes key concepts related to consistency models and replication in distributed systems. It covers:
1) Different models of consistency like strict consistency, sequential consistency, causal consistency, and eventual consistency. Weaker models allow more flexible replication but can violate ordering guarantees.
2) Consistency is enforced through synchronization operations or lack thereof. Models using synchronization include weak, release, and entry consistency.
3) Replication techniques like primary-backup, quorum-based, and active replication protocols for maintaining consistency across replicas during reads and writes.
4) Local-write and remote-write protocols differ in where updates are applied primarily. Consistency is maintained through propagating the updates.
The document discusses threads, which allow for multiple paths of execution within an application. All user interface updates must occur on the main thread. While performing background tasks, one can use timers, performSelector methods, or manual NSThreads to ensure the main thread remains responsive for UI updates. JSON provides a simple format for communicating data between client and server applications on iPhone, and the SBJSON framework can be used to parse JSON strings into Objective-C objects.
This document discusses synchronization in multithreaded applications in Java. It covers key concepts like monitors, synchronized methods and statements, and inter-thread communication using wait(), notify(), and notifyAll() methods. Synchronized methods ensure only one thread can access a shared resource at a time by acquiring the object's monitor. synchronized statements allow synchronizing access to non-synchronized methods. Inter-thread communication allows threads to wait for notifications from other threads rather than busy waiting.
Every Java developer knows that multithreading is the root of all evil and it is quite hard to write correct code for concurrent environment. But what tasks do exist in real commercial development except running code in asynchronous way?
In this talk I will present several tasks from my real projects and solutions we designed for them. This talk is very application oriented and allows participants to extend their vision of concurrent programming.
The document discusses modifying C++ code in OMNeT++ simulations to model node behavior and energy consumption over time. It describes adding code to nodes to send periodic packets that consume energy, and have nodes stop transmitting when energy is depleted. It also discusses using the OMNeT++ INI file to configure simulation parameters like transmission interval and initial energy for different experiment configurations.
The document provides an overview of the Opal compiler for Pharo. It discusses the key components of the compiler including the AST, semantic analysis, intermediate representation (IR) generation using IRBuilder, and bytecode generation. The compiler features a fully reified compilation process with distinct phases for scanning, parsing, semantic analysis, IR generation from the AST using visitors, and bytecode output. The design focuses on each component being implemented as a visitor on the representations.
This document summarizes the Squeak programming environment. It discusses Squeak's history stemming from Alan Kay's Dynabook vision and its development at Xerox PARC as Smalltalk. Key features of Squeak include being a prototyping environment based on Smalltalk with multimedia capabilities. The document outlines several projects built using Squeak such as Sophie, Croquet, and Seaside. It argues Squeak is useful for research due to its reflective capabilities and being easy to modify, enabling rapid prototyping of new languages and tools to support software evolution.
This document discusses Java's Fork Join framework for parallel processing on multicore systems. It introduces the history of single-core versus multicore processing. The Fork Join framework allows dividing problems into smaller sub-problems ("forking") that can execute concurrently on different cores, with the ability to join results together. It uses a ForkJoinPool that implements work-stealing to efficiently schedule many small tasks across available cores. Examples include summing the elements of an array in parallel.
The fork/join framework, which is based on the ForkJoinPool class, is an implementation of the Executor interface. It is designed to efficiently run a large number of tasks using a pool of worker threads. A work-stealing technique is used to keep all the worker threads busy, to take full advantage of multiple processors
Coroutines are Kotlin's solution for concurrency and allow doing something else while waiting for results. They avoid issues with threading like memory usage and bottlenecks. Coroutines use suspending functions to pause execution and switch to other coroutines. They can be cancelled, have timeouts set, and structured hierarchically with jobs. Common coroutine patterns include producers that return values on channels and actors that receive messages on inbound channels. Coroutines are backed by event loops and may require yield() if CPU bound to allow other coroutines to run.
This document discusses new features in Visual Studio 2010 and .NET Framework 4. It provides an overview of improvements to the .NET Framework including numerics, data structures, I/O, and a unified cancellation model. It also describes goals of the CLR 4 such as better integration, performance, and reliability through features like in-process side-by-side loading, the dynamic language runtime, parallel extensions, and code contracts for debugging. The workshop will examine these new capabilities in the .NET Framework 4.
"WTF is Twisted? (or; owl amongst the ponies)" is a talk that introduces the Twisted asynchronous programming framework, how it works, and what uses it.
Threads And Synchronization in C#
Concept about Threads And Synchronization in C#
it will help you about this concept
feel free
Download free programming applications on
http://www.androidapplications.xyz
The document discusses input and output streams in Java. It describes the BufferedReader class, which reads text from a character input stream and buffers it for efficient reading. It also discusses the Scanner class in Java's util package for reading user input through the keyboard. An example program is provided that uses Scanner to read integer and float values from the user and calculate their sum.
This session was presented at the JFall 2011 conference in The Netherlands. It introduces the Fork/Join framework that was introduced in Java 7. Example code can be found at http://bit.y/jfall-forkjoin
This document discusses .NET multi-threading concepts including blocking, locking, signaling, and non-blocking techniques. It provides code examples for managing threads using techniques like Join, lock, Mutex, and EventWaitHandle. It also covers thread pools, common problems like race conditions and deadlocks, and proven practices for safe multi-threaded programming.
Introduction to JDK7's Fork/Join framework. Present on May 3 2012 at the Belgian Java User Group (BeJUG). For more information see: http://www.bejug.org/confluenceBeJUG/display/BeJUG/ForkJoin+and+Akka
Demo code can be found at http://bit.ly/bejug-fj
This document provides an overview of multithreading concepts including when to use threads, threading primitives like mutexes and semaphores, common issues like race conditions and deadlocks, and alternatives to using threads. Key topics covered include GUI responsiveness, utilizing all processors, network connectivity, atomic functions, mutual exclusion, events and conditions, and memory barriers.
Adam Sitnik "State of the .NET Performance"Yulia Tsisyk
MSK DOT NET #5
2016-12-07
In this talk Adam will describe how latest changes in.NET are affecting performance.
Adam wants to go through:
C# 7: ref locals and ref returns, ValueTuples.
.NET Core: Spans, Buffers, ValueTasks
And how all of these things help build zero-copy streams aka Channels/Pipelines which are going to be a game changer in the next year.
Exploiting Multicore CPUs Now: Scalability and Reliability for Off-the-shelf ...Emery Berger
Multiple core CPUs are here. Conventional wisdom holds that, to take best advantage of these processors, we now need to rewrite sequential applications to make them multithreaded. Because of the difficulty of programming correct and efficient multithreaded applications (e.g., race conditions, deadlocks, and scalability bottlenecks), this is a major challenge.
This talk presents two alternative approaches that bring the power of multiple cores to today's software. The first approach focuses on building highly-concurrent client-server applications from legacy code. I present a system called Flux that allows users to take unmodified off-the-shelf *sequential* C and C++ code and build concurrent applications. The Flux compiler combines the Flux program and the sequential code to generate a deadlock-free, high-concurrency server. Flux also generates discrete event simulators that accurately predict actual server performance under load. While the Flux language was initially targeted at servers, we have found it to be a useful abstraction for sensor networks, and I will briefly talk about our use of an energy-aware variant of Flux in a deployment on the backs of endangered turtles. The second approach uses the extra processing power of multicore CPUs to make legacy C/C++ applications more reliable. I present a system called DieHard that uses randomization and replication to transparently harden programs against a wide range of errors, including buffer overflows and dangling pointers. Instead of crashing or running amok, DieHard lets programs continue to run correctly in the face of memory errors with high probability. This is joint work with Brendan Burns, Kevin Grimaldi, Alex Kostadinov, Jacob Sorber, and Mark Corner (University of Massachusetts Amherst), and Ben Zorn (Microsoft Research).
This talk was given in ilJUG on the 29th of July 2014 and discusses the new Java8 StampedLock class. It compares it to different locking mechanism is Java and shows some insights deduced from a simple benchmark
The document summarizes key concepts related to consistency models and replication in distributed systems. It covers:
1) Different models of consistency like strict consistency, sequential consistency, causal consistency, and eventual consistency. Weaker models allow more flexible replication but can violate ordering guarantees.
2) Consistency is enforced through synchronization operations or lack thereof. Models using synchronization include weak, release, and entry consistency.
3) Replication techniques like primary-backup, quorum-based, and active replication protocols for maintaining consistency across replicas during reads and writes.
4) Local-write and remote-write protocols differ in where updates are applied primarily. Consistency is maintained through propagating the updates.
The document discusses threads, which allow for multiple paths of execution within an application. All user interface updates must occur on the main thread. While performing background tasks, one can use timers, performSelector methods, or manual NSThreads to ensure the main thread remains responsive for UI updates. JSON provides a simple format for communicating data between client and server applications on iPhone, and the SBJSON framework can be used to parse JSON strings into Objective-C objects.
This document discusses synchronization in multithreaded applications in Java. It covers key concepts like monitors, synchronized methods and statements, and inter-thread communication using wait(), notify(), and notifyAll() methods. Synchronized methods ensure only one thread can access a shared resource at a time by acquiring the object's monitor. synchronized statements allow synchronizing access to non-synchronized methods. Inter-thread communication allows threads to wait for notifications from other threads rather than busy waiting.
Every Java developer knows that multithreading is the root of all evil and it is quite hard to write correct code for concurrent environment. But what tasks do exist in real commercial development except running code in asynchronous way?
In this talk I will present several tasks from my real projects and solutions we designed for them. This talk is very application oriented and allows participants to extend their vision of concurrent programming.
The document discusses modifying C++ code in OMNeT++ simulations to model node behavior and energy consumption over time. It describes adding code to nodes to send periodic packets that consume energy, and have nodes stop transmitting when energy is depleted. It also discusses using the OMNeT++ INI file to configure simulation parameters like transmission interval and initial energy for different experiment configurations.
The document provides an overview of the Opal compiler for Pharo. It discusses the key components of the compiler including the AST, semantic analysis, intermediate representation (IR) generation using IRBuilder, and bytecode generation. The compiler features a fully reified compilation process with distinct phases for scanning, parsing, semantic analysis, IR generation from the AST using visitors, and bytecode output. The design focuses on each component being implemented as a visitor on the representations.
This document summarizes the Squeak programming environment. It discusses Squeak's history stemming from Alan Kay's Dynabook vision and its development at Xerox PARC as Smalltalk. Key features of Squeak include being a prototyping environment based on Smalltalk with multimedia capabilities. The document outlines several projects built using Squeak such as Sophie, Croquet, and Seaside. It argues Squeak is useful for research due to its reflective capabilities and being easy to modify, enabling rapid prototyping of new languages and tools to support software evolution.
Lightning talk (20 min) I gave at Fosdem in february 2008 in Brussels, to announce Squeak by Example and make a little noise around Smalltalk.
Resources…
- http://www.SqueakByExample.org
- Alto pictures from http://ftp.squeak.org/Media/
- the font is Jan Gerner's Yanone Kaffeesatz: http://fonts.info/info/en_yanone-kaffeesatz.htm
Programming languages must be implemented in Java or C, everybody knows this. Sure, a prototype in Ruby, but that would be unusable. After all, Ruby is made for web development, right? Hard tasks, like implementing a compiler, have to happen in far more manly languages. But wait, the Rubinius compiler is written completely in Ruby, and it seems to get pretty decent performance, maybe we can use that.
In this talk, we will explore the possibilities of using the Rubinius compiler tool chain to implement our own programming language targeting the Rubinius VM. We get all the hard work that went into Rubinius for free and above all, can do the heavy lifting in Ruby, everyone's favorite programming language.
As an example we'll use Reak, a Smalltalk implementation running on Rubinius.
SWT is a web development framework based on Model-View-Controller that allows developing web applications entirely in Smalltalk. It divides the application into a server part running Smalltalk code and a client part running translated Javascript code. SWT uses Comet to push updates from the server-side model to the client-side views without polling, enabling real-time collaborative applications. It includes a translator from Smalltalk to Javascript so developers can write both parts of the application in Smalltalk without knowing Javascript. Several real projects have been built with SWT, including games, virtual museums, and image viewers.
Development and Features of the new Cincom Smalltalk ObjectStudio LauncherESUG
Development and Features of the new Cincom Smalltalk ObjectStudio Launcher
Wed, August 24, 3:30pm – 4:00pm
Youtube: https://youtu.be/iJxAUhydgHA
Description
First Name: Andreas
Last Name: Hiltner
Email where you can always be reached: ahiltner@cincom.com
Title: "Development and Features of the new Cincom Smalltalk ObjectStudio Launcher"
Type: Talk
Abstract: In this presentation Andreas will demonstrate a new launcher for Cincom Smalltalk
ObjectStudio 8.8, written from the ground up in the Next Generation UI.
The NG UI is a framework for a native Windows UI that is written entirely in
Cincom Smalltalk, using DLLCC to connect to the Windows API.
Bio: Andreas Hiltner is currently the Lead VM Engineer for Cincom ObjectStudio, in addition to having a
hand in most aspects of base image and database development. He works from home near
Nuremberg, Germany, where he just recently returned after spending five years with his family in the
US at Cincom’s headquarters in Cincinnati, Ohio.
Along with many contributions to ObjectStudio over the years, he was the project lead in Cincom’s
development of the current 8.x versions of ObjectStudio, based on Cincom® VisualWorks®.
He was also the Lead Engineer for the Next Generation UI Project.
Andreas is a seasoned architect who has specialized in ObjectStudio for more than 15 years. In his years of
working with Cincom he has had the opportunity to assist key Cincom Smalltalk™ users worldwide,
including one of the world’s top five financial institutions, and several government agencies.
Whats New in Visual Studio 2012 for C++ DevelopersRainer Stropek
For a Microsoft event we have been hired to do a full-day workshop about news in Visual Studio 2012 for C++ developers. My colleague Philipp Aumayr conducted the workshop. Here are the slides for his talk. More details including sample code can be found in our developer blog at http://www.software-architects.com
The document appears to be a block of random letters with no discernible meaning or purpose. It consists of a series of letters without any punctuation, formatting, or other signs of structure that would indicate it is meant to convey any information. The document does not provide any essential information that could be summarized.
This document outlines a course on .NET programming with VB.NET. It introduces key .NET concepts like the Common Language Runtime (CLR) and assemblies. It describes how VB.NET code is compiled to MSIL and executed by the CLR. The course covers building classes and objects in VB.NET, object-oriented programming fundamentals, working with .NET framework classes, creating Windows and web forms applications, and data access with ADO.NET.
The document provides an introduction to .NET, describing what it is, its core components like the .NET Framework and Common Language Runtime (CLR), advantages such as cross-language development and improved security, and popular languages for .NET development like C# and Visual Basic .NET. Key aspects of the .NET Framework are outlined, including namespaces for organizing classes, support for web standards, and ADO.NET for database access. Differences between C# and Visual Basic .NET are highlighted, such as syntax and intended uses as a rapid application development tool.
The document provides an overview of the .NET framework including:
- The Common Language Runtime allows code to be executed across platforms and languages.
- The .NET Framework Class Library includes classes for data access, XML, ASP.NET, and user interfaces.
- Memory is managed automatically through garbage collection which frees unreachable objects and compacts memory.
Visual Studio 2010 includes many improvements such as a new WPF-based interface, enhanced debugging tools like call hierarchy and breakpoint labeling, and improved support for technologies like ASP.NET, WPF, and Silverlight. The .NET 4.0 framework features improvements to core types and services, such as new data structures and I/O capabilities. C# 4.0 and VB 10 add functionality like dynamic typing, covariance/contravariance, optional and named parameters to reduce ceremony. Both support the dynamic language runtime for easier interoperability with dynamic languages.
The Ring programming language version 1.5.2 book - Part 176 of 181Mahmoud Samir Fayed
This document provides code examples for connecting to different database file types like dBase (.dbf) files and Visual FoxPro databases using the ODBC interface in Ring. It shows how to initialize an ODBC connection, execute queries to select data, fetch rows and retrieve column values. It also discusses how Ring supports multiple programming paradigms and why method calls can't be used directly in event handlers like setClickEvent().
The Ring programming language version 1.5.4 book - Part 180 of 185Mahmoud Samir Fayed
This document provides code examples for connecting to different database file formats like dBase (.dbf) files and Visual FoxPro databases using the ODBC interface in Ring. It shows how to initialize an ODBC connection, execute queries to select data, fetch rows and retrieve column values. It also discusses how Ring supports multiple programming paradigms and why method calls may require a string of code rather than direct invocation. Additional examples demonstrate how to properly define functions and classes to avoid "function without definition" errors.
We've all seen the big "macro" features in .NET, this presentation is to give praise to the "Little Wonders" of .NET -- those little items in the framework that make life as a developer that much easier!
A code kata in C# to help practice techniques for safely removing dependencies form legacy code and creating unit tests. Questions? Suggestions? Contact @dubmun.
The document provides an overview of .NET-based languages and the .NET framework. It discusses key concepts like the common language runtime, namespaces, and language interoperability. It also compares Visual Basic .NET and C# and demonstrates creating a class library component in Visual Studio .NET.
This document provides an introduction and overview of .NET including:
1) It describes what .NET is, the .NET framework, advantages of .NET and the CLR, and Visual Studio 2005.
2) It outlines some of the main components of the .NET framework including namespaces, classes, and support for web standards.
3) It compares C# and VB.NET programming languages and highlights some differences in syntax and features.
This document provides an introduction and overview of .NET including:
1) It describes what .NET is, the .NET framework, advantages of .NET and the CLR, and Visual Studio 2005.
2) It outlines some of the main components of the .NET framework including namespaces, classes, and support for web standards.
3) It compares C# and VB.NET programming languages and highlights some differences in syntax and features.
This document provides an introduction and overview of .NET including:
1) It describes what .NET is, the .NET framework, advantages of .NET and the CLR, and Visual Studio 2005.
2) It outlines some of the main components of the .NET framework including namespaces, classes, and support for web standards.
3) It compares C# and VB.NET programming languages and highlights some differences in syntax and features.
This document provides an introduction and overview of .NET including:
1) It describes what .NET is, the .NET framework, advantages of .NET and the CLR, and Visual Studio 2005.
2) It outlines some of the main components of the .NET framework including namespaces, classes, and support for web standards.
3) It compares C# and VB.NET programming languages and highlights some differences in syntax and features.
L Fu - Dao: a novel programming language for bioinformaticsJan Aerts
The document introduces Dao, a new programming language for bioinformatics. It discusses Dao's key features like optional typing, native support for concurrent programming, an LLVM-based JIT compiler, simple C interfaces, and the ClangDao tool for wrapping C/C++ libraries. An example demonstrates using thread tasks and futures for concurrent programming. The document outlines future plans to develop BioDao, an open source project providing bioinformatics modules to the Dao language.
Code Review Checklist: How far is a code review going? "Metrics measure the design of code after it has been written, a Review proofs it and Refactoring improves code."
In this paper a document structure is shown and tips for a code review.
Some checks fits with your existing tools and simply raises a hand when the quality or security of your codebase is impaired.
Attributes allow flexibility in C# by extending metadata. Common built-in attributes include Obsolete, DllImport, and Conditional. Custom attributes can be created by defining attribute classes. .NET components are executable code known as assemblies. Reflection allows reading metadata from assemblies, including attribute information.
The document discusses various small features and techniques in .NET called "little wonders" that can improve code readability, maintainability, and performance. It provides examples of implicit typing, auto-properties, using blocks, static class modifiers, casts, string methods, object and path helpers, Stopwatch, TimeSpan factories, operators, initializers, and extension methods. The techniques allow writing more concise and clear code to handle common tasks like property declaration, exception handling, null checking, and LINQ queries.
This document provides an introduction to programming with C# and the .NET Framework. It discusses what computer programming is, defines the key phases of programming like problem definition, algorithm design, coding, testing and debugging. It then covers the basics of a "Hello World" C# program including code structure, formatting and execution. The document also introduces the .NET Framework, Visual Studio IDE and MSDN library as essential tools and resources for C# programming.
Workshop: Identifying concept inventories in agile programmingESUG
This document discusses the development of a concept inventory to identify common misconceptions in agile programming and object-oriented development. The project aims to strengthen collaboration between INRIA/Lille and ÉTS/UQAM by creating a concept inventory that can be used to improve teaching of agile development with object-oriented languages like TypeScript, JavaScript, and Pharo. The methodology involves identifying misconceptions, proposing a concept inventory, and validating it in courses by measuring understanding before and after instruction. A workshop will help identify initial misconceptions in Smalltalk/Pharo by capturing them in a collaborative tool.
This document proposes integrating documentation into the Pharo language metamodel and environment to improve documentation support. It suggests making documentation first-class citizens in Pharo by providing built-in support and a minimal API, which would allow tight integration with development tools and future extensions without requiring grammar changes or large efforts. This could improve documentation quality by enabling direct references between code and documentation and automatic logging of documentation usage.
The Pharo Debugger and Debugging tools: Advances and RoadmapESUG
This document outlines advances and the roadmap for debugging tools in Pharo. It discusses recent improvements to the debugging infrastructure, including architectural changes and new debugging commands. It also describes upcoming work, such as additional infrastructure improvements, an emergency debugger, support for meta-object protocols, a redesigned user experience, a remote debugger, and improved documentation. The document concludes by inviting participants to help evaluate new debugging experiments.
The document describes Sequence, a pipeline modeling and discrete event simulation framework developed in Pharo Smalltalk. Sequence allows describing system resources, building blocks that use those resources, assembling scenarios from blocks, collecting information during simulated runs, and interactively exploring system traces. The framework implements a discrete event simulation engine with event streams that model periodic processes and resources. Sequence provides tools for evaluating system performance through simulation before complete hardware is available.
Migration process from monolithic to micro frontend architecture in mobile ap...ESUG
This document discusses migrating a monolithic mobile application called CARL Touch to a micro frontend architecture. It presents a migration process involving three steps: 1) analysis of the monolithic codebase, 2) identification of potential micro frontends, and 3) transformation of the codebase to implement the identified micro frontends. Previous experiments at Berger-Levrault involving two teams migrating CARL Touch provided insights. The proposed process uses static and dynamic analysis, code visualization and clustering techniques to help identify optimal micro frontends and transform the codebase in a semi-automated manner.
Analyzing Dart Language with Pharo: Report and early resultsESUG
This document summarizes an analysis of the Dart programming language using tools in the Pharo environment. It describes generating a parser for Dart using SmaCC, which produces an AST. It also details defining a Famix meta-model for Dart and the Chartreuse-D importer that creates a FamixDart model from the AST. Future work is outlined, including improving SmaCCDart, continuing to develop the FamixDart meta-model, and handling dynamic types when importing associations. The goal is to analyze Dart and explore modeling Flutter applications.
Transpiling Pharo Classes to JS ECMAScript 5 versus ECMAScript 6ESUG
This document summarizes research on transpiling Pharo classes to JavaScript using ECMAScript 5 versus ECMAScript 6. It finds that transpiling to ES6 provides benefits like significantly faster load times, improved benchmark performance up to 43%, and more idiomatic code compared to ES5. However, fully emulating Smalltalk semantics like metaclass inheritance remains challenging when targeting JavaScript.
The document presents an approach for automated test generation from software models and execution traces. Key aspects of the approach include using metamodels to represent the codebase, values, and desired unit test structure. Models are built from the codebase and traces, then transformations are applied to generate unit tests conforming to the test metamodel. Abstract syntax trees are used to export the generated tests to code. The approach aims to generate tests that are relevant, readable and maintainable without relying on existing tests. An example demonstrates generating a JUnit test from an application class.
Genetic programming is used to generate unit tests by evolving test code via genetic algorithms to maximize coverage. Tests are represented as chromosomes of object and message statements. The genetic algorithm selects tests based on coverage, combines tests through crossover, and replaces tests in the population over generations to find optimal test sequences. Future work includes improving path exploration and comparing with other test generation tools.
Threaded-Execution and CPS Provide Smooth Switching Between Execution ModesESUG
Threaded execution and continuation-passing style (CPS) allow for smooth switching between execution modes in Zag Smalltalk. Threaded execution interprets code as a sequence of addresses like bytecode but is 2.3-4.7 times faster, while CPS passes continuations explicitly like in functional languages and is 3-5 times faster than bytecode. Both approaches allow fallback to debugging. The implementation shares context and stack between modes to easily switch with proper object structures.
Exploring GitHub Actions through EGAD: An Experience ReportESUG
This document summarizes an experience report on exploring GitHub Actions through EGAD, a tool for GitHub Action analysis. It discusses three key lessons learned: 1) Composing a story by documenting tasks and linking documentation to code, 2) Navigating custom views to conduct research, and 3) Supporting onboarding of researchers by assigning mentors, scheduling meetings, and encouraging use of resources. EGAD takes workflow YAML files, wraps them in a domain model to provide context, and allows inspecting examples to fully explore the GitHub Actions domain model.
Pharo: a reflective language A first systematic analysis of reflective APIsESUG
This document analyzes the reflective features and APIs in Pharo, a reflective programming language. It presents a catalog of Pharo's reflective APIs and analyzes how they relate to metaobjects. The analysis highlights areas for potential improvement, such as providing solutions for intercession on state reads/writes and addressing constraints when changing an object's class. The document contributes to understanding Pharo's reflective design and its evolution over time.
The document discusses garbage collector tuning for applications with pathological allocation patterns. It begins by explaining the motivation and issues caused by pathological patterns, such as applications taking over an hour and a half to run. It then provides an overview of garbage collection and how allocation patterns can impact performance. The document dives into two specific tuning techniques - increasing the full GC threshold to prevent premature full GCs from being triggered, and increasing the tenuring threshold to avoid large objects residing in the remembered set and slowing down scavenges. These tunings resulted in significant performance improvements for the sample DataFrame application, reducing the run time from over an hour and a half to around seven minutes.
Improving Performance Through Object Lifetime Profiling: the DataFrame CaseESUG
This document discusses improving garbage collection performance in Pharo through object lifetime profiling. It presents Illimani, a lifetime profiler developed for Pharo. Illimani was used to profile the lifetimes of objects created when loading a large DataFrame. The profiling revealed that most objects had short lifetimes, suggesting the garbage collector could be tuned. Tuning the garbage collector parameters based on the lifetime profiles improved the performance of loading the DataFrame.
This document discusses the past, present, and future of Pharo DataFrames. It began as a student project but has evolved into a mature project with dedicated engineers, improving performance and adding functionality. Future plans include further performance enhancements, adding more functionality, better integration with other Pharo projects, and support for big data. Evaluation of DataFrames is also planned.
This document discusses issues with thisContext in the Pharo debugger not correctly representing the execution context and being the DoIt context instead. This was fixed in Pharo12 by making thisContext a variable object that is wrapped in a DoItVariable, so the debugger context is used. When inspecting or doing DoIt, the doIt Variable is pushed and read to provide the proper execution context.
This document proposes using websockets to display fencing scores and a chronometer from an arena server to mobile phones over the internet in real-time. It includes links to video examples of a chronometer display and photos from fencing competitions.
ShowUs: PharoJS.org Develop in Pharo, Run on JavaScriptESUG
This document discusses PharoJS, which allows developers to develop applications in Pharo and then export them to run as JavaScript applications. PharoJS enables 100% of Pharo code to be executed during development, and then 100% of that same code is exported to JavaScript to be executed in production. The document also briefly mentions deployment options for exported PharoJS applications like GitHub Pages and GitHub Actions.
The document contains testimonials from participants of the Pharo MOOC praising its effectiveness at teaching object-oriented design. It also announces an upcoming advanced design MOOC that will have over 60 lectures, slides, videos and an exercise booklet. Finally, it provides links to the course websites and encourages people to stay tuned for the new MOOC.
A New Architecture Reconciling Refactorings and TransformationsESUG
This document discusses reconciling refactorings and transformations in software engineering. It proposes a new architecture where refactorings decorate transformations by checking preconditions and composing multiple transformations. Refactorings ensure transformations are applied safely while transformations focus on model changes. Open questions remain around precondition handling and composition semantics. The goals are to reduce duplication, support custom refactorings/transformations, and provide a modern driver-based user interface.
Freshworks Rethinks NoSQL for Rapid Scaling & Cost-EfficiencyScyllaDB
Freshworks creates AI-boosted business software that helps employees work more efficiently and effectively. Managing data across multiple RDBMS and NoSQL databases was already a challenge at their current scale. To prepare for 10X growth, they knew it was time to rethink their database strategy. Learn how they architected a solution that would simplify scaling while keeping costs under control.
"What does it really mean for your system to be available, or how to define w...Fwdays
We will talk about system monitoring from a few different angles. We will start by covering the basics, then discuss SLOs, how to define them, and why understanding the business well is crucial for success in this exercise.
inQuba Webinar Mastering Customer Journey Management with Dr Graham HillLizaNolte
HERE IS YOUR WEBINAR CONTENT! 'Mastering Customer Journey Management with Dr. Graham Hill'. We hope you find the webinar recording both insightful and enjoyable.
In this webinar, we explored essential aspects of Customer Journey Management and personalization. Here’s a summary of the key insights and topics discussed:
Key Takeaways:
Understanding the Customer Journey: Dr. Hill emphasized the importance of mapping and understanding the complete customer journey to identify touchpoints and opportunities for improvement.
Personalization Strategies: We discussed how to leverage data and insights to create personalized experiences that resonate with customers.
Technology Integration: Insights were shared on how inQuba’s advanced technology can streamline customer interactions and drive operational efficiency.
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...Alex Pruden
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
How to Interpret Trends in the Kalyan Rajdhani Mix Chart.pdfChart Kalyan
A Mix Chart displays historical data of numbers in a graphical or tabular form. The Kalyan Rajdhani Mix Chart specifically shows the results of a sequence of numbers over different periods.
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...Fwdays
Direct losses from downtime in 1 minute = $5-$10 thousand dollars. Reputation is priceless.
As part of the talk, we will consider the architectural strategies necessary for the development of highly loaded fintech solutions. We will focus on using queues and streaming to efficiently work and manage large amounts of data in real-time and to minimize latency.
We will focus special attention on the architectural patterns used in the design of the fintech system, microservices and event-driven architecture, which ensure scalability, fault tolerance, and consistency of the entire system.
How information systems are built or acquired puts information, which is what they should be about, in a secondary place. Our language adapted accordingly, and we no longer talk about information systems but applications. Applications evolved in a way to break data into diverse fragments, tightly coupled with applications and expensive to integrate. The result is technical debt, which is re-paid by taking even bigger "loans", resulting in an ever-increasing technical debt. Software engineering and procurement practices work in sync with market forces to maintain this trend. This talk demonstrates how natural this situation is. The question is: can something be done to reverse the trend?
What is an RPA CoE? Session 1 – CoE VisionDianaGray10
In the first session, we will review the organization's vision and how this has an impact on the COE Structure.
Topics covered:
• The role of a steering committee
• How do the organization’s priorities determine CoE Structure?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems
Conversational agents, or chatbots, are increasingly used to access all sorts of services using natural language. While open-domain chatbots - like ChatGPT - can converse on any topic, task-oriented chatbots - the focus of this paper - are designed for specific tasks, like booking a flight, obtaining customer support, or setting an appointment. Like any other software, task-oriented chatbots need to be properly tested, usually by defining and executing test scenarios (i.e., sequences of user-chatbot interactions). However, there is currently a lack of methods to quantify the completeness and strength of such test scenarios, which can lead to low-quality tests, and hence to buggy chatbots.
To fill this gap, we propose adapting mutation testing (MuT) for task-oriented chatbots. To this end, we introduce a set of mutation operators that emulate faults in chatbot designs, an architecture that enables MuT on chatbots built using heterogeneous technologies, and a practical realisation as an Eclipse plugin. Moreover, we evaluate the applicability, effectiveness and efficiency of our approach on open-source chatbots, with promising results.
Essentials of Automations: Exploring Attributes & Automation ParametersSafe Software
Building automations in FME Flow can save time, money, and help businesses scale by eliminating data silos and providing data to stakeholders in real-time. One essential component to orchestrating complex automations is the use of attributes & automation parameters (both formerly known as “keys”). In fact, it’s unlikely you’ll ever build an Automation without using these components, but what exactly are they?
Attributes & automation parameters enable the automation author to pass data values from one automation component to the next. During this webinar, our FME Flow Specialists will cover leveraging the three types of these output attributes & parameters in FME Flow: Event, Custom, and Automation. As a bonus, they’ll also be making use of the Split-Merge Block functionality.
You’ll leave this webinar with a better understanding of how to maximize the potential of automations by making use of attributes & automation parameters, with the ultimate goal of setting your enterprise integration workflows up on autopilot.
Discover top-tier mobile app development services, offering innovative solutions for iOS and Android. Enhance your business with custom, user-friendly mobile applications.
"Choosing proper type of scaling", Olena SyrotaFwdays
Imagine an IoT processing system that is already quite mature and production-ready and for which client coverage is growing and scaling and performance aspects are life and death questions. The system has Redis, MongoDB, and stream processing based on ksqldb. In this talk, firstly, we will analyze scaling approaches and then select the proper ones for our system.
Main news related to the CCS TSI 2023 (2023/1695)Jakub Marek
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
What is an RPA CoE? Session 2 – CoE RolesDianaGray10
In this session, we will review the players involved in the CoE and how each role impacts opportunities.
Topics covered:
• What roles are essential?
• What place in the automation journey does each role play?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems