The document provides an introduction to RxJS (Reactive Extensions for JavaScript), which is a reactive programming library for asynchronous operations. It discusses key RxJS concepts like Observables, operators, and functional reactive programming. It also provides examples of using RxJS to handle events asynchronously and processing streams of data.
서버 개발자가 바라 본 Functional Reactive Programming with RxJava - SpringCamp2015NAVER / MusicPlatform
youtube : https://youtu.be/E_Bgv9upahI
비동기 이벤트 기반의 라이브러리로만 생각 했던 RxJava가 지금 이 시대 프로그래머에게 닥쳐 올 커다란 메시지라는 사실을 알게 된 지금. 현장에서 직접 느낀 RxJava의 본질인 Function Reactive Programming(FRP)에 대해 우리가 잘 아는 Java 이야기로 풀어 보고 ReactiveX(RxJava) 개발을 위한 서버 환경에 대한 이해와 SpringFramework, Netty에서의 RxJava를 어떻게 이용 하고 개발 했는지 공유 하고자 합니다.
The document discusses Rx.js, a library for reactive programming using Observables. It begins by introducing Rx.js and some of its key benefits over other approaches to asynchronous programming like callbacks and Promises. It then provides examples of using Observables to represent asynchronous data streams and operations like DOM events. Key points made include that Observables allow for lazy execution, cancellation, composition of existing event streams, and treating asynchronous values as collections. The document concludes by demonstrating how Rx.js allows building a Morse code parser by modeling DOM events and signals as Observable streams.
RxJS - The Reactive extensions for JavaScriptViliam Elischer
RxJS is a library for composing asynchronous and event-based programs using observable sequences and functional style operators. It provides developers with Observables to represent asynchronous data streams, operators to query those streams, and Schedulers to parameterize concurrency. Some key operators include map to project values, filter to select values, reduce to aggregate values, and flatMap to flatten nested observables. RxJS supports both hot and cold observables, and is used for tasks like DOM event handling, API communication, and state management in applications.
Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/2a2Djbp.
Gerard Sans explains RxJS' data architecture based on reactive programming, exploring Observables API using RxJS koans and unit tests. RxJS 5 focuses on performance and usability. Filmed at qconlondon.com.
Gerard Sans is a multi-talented Computer Science Engineer specialised in Web. He has lived and worked for all sorts of companies in Germany, Brazil, UK and Spain. He enjoys running AngularJS Labs London, mentoring AngularJS students, participating in the community, giving talks and writing technical articles at Medium.
This document summarizes the new features and goals of RxJS version 5, which aims to improve the modularity, performance, debugging, and extensibility of the RxJS library. Key changes include making RxJS fully modular, improving performance by reducing allocations and call stack sizes, enhancing debugging with simpler operator implementations, and allowing better extensibility through subclassing Observables and maintaining Subject bi-directionality. Simpler unit tests using marble diagrams are also highlighted.
This document discusses functional reactive programming and reactive programming concepts. It compares imperative programming to declarative and reactive programming. Functional programming uses pure functions to create immutable programs without side effects. Reactive programming involves asynchronous data streams that are sequences of ongoing events ordered over time. The document provides code examples demonstrating pure vs impure functions, referential transparency, and reactive programming with RxSwift.
The document provides an introduction to RxJS (Reactive Extensions for JavaScript), which is a reactive programming library for asynchronous operations. It discusses key RxJS concepts like Observables, operators, and functional reactive programming. It also provides examples of using RxJS to handle events asynchronously and processing streams of data.
서버 개발자가 바라 본 Functional Reactive Programming with RxJava - SpringCamp2015NAVER / MusicPlatform
youtube : https://youtu.be/E_Bgv9upahI
비동기 이벤트 기반의 라이브러리로만 생각 했던 RxJava가 지금 이 시대 프로그래머에게 닥쳐 올 커다란 메시지라는 사실을 알게 된 지금. 현장에서 직접 느낀 RxJava의 본질인 Function Reactive Programming(FRP)에 대해 우리가 잘 아는 Java 이야기로 풀어 보고 ReactiveX(RxJava) 개발을 위한 서버 환경에 대한 이해와 SpringFramework, Netty에서의 RxJava를 어떻게 이용 하고 개발 했는지 공유 하고자 합니다.
The document discusses Rx.js, a library for reactive programming using Observables. It begins by introducing Rx.js and some of its key benefits over other approaches to asynchronous programming like callbacks and Promises. It then provides examples of using Observables to represent asynchronous data streams and operations like DOM events. Key points made include that Observables allow for lazy execution, cancellation, composition of existing event streams, and treating asynchronous values as collections. The document concludes by demonstrating how Rx.js allows building a Morse code parser by modeling DOM events and signals as Observable streams.
RxJS - The Reactive extensions for JavaScriptViliam Elischer
RxJS is a library for composing asynchronous and event-based programs using observable sequences and functional style operators. It provides developers with Observables to represent asynchronous data streams, operators to query those streams, and Schedulers to parameterize concurrency. Some key operators include map to project values, filter to select values, reduce to aggregate values, and flatMap to flatten nested observables. RxJS supports both hot and cold observables, and is used for tasks like DOM event handling, API communication, and state management in applications.
Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/2a2Djbp.
Gerard Sans explains RxJS' data architecture based on reactive programming, exploring Observables API using RxJS koans and unit tests. RxJS 5 focuses on performance and usability. Filmed at qconlondon.com.
Gerard Sans is a multi-talented Computer Science Engineer specialised in Web. He has lived and worked for all sorts of companies in Germany, Brazil, UK and Spain. He enjoys running AngularJS Labs London, mentoring AngularJS students, participating in the community, giving talks and writing technical articles at Medium.
This document summarizes the new features and goals of RxJS version 5, which aims to improve the modularity, performance, debugging, and extensibility of the RxJS library. Key changes include making RxJS fully modular, improving performance by reducing allocations and call stack sizes, enhancing debugging with simpler operator implementations, and allowing better extensibility through subclassing Observables and maintaining Subject bi-directionality. Simpler unit tests using marble diagrams are also highlighted.
This document discusses functional reactive programming and reactive programming concepts. It compares imperative programming to declarative and reactive programming. Functional programming uses pure functions to create immutable programs without side effects. Reactive programming involves asynchronous data streams that are sequences of ongoing events ordered over time. The document provides code examples demonstrating pure vs impure functions, referential transparency, and reactive programming with RxSwift.
Add Some Fun to Your Functional Programming With RXJSRyan Anklam
This document discusses using RxJS (Reactive Extensions for JavaScript) to add interactivity and animation to an autocomplete search widget. Key events are turned into observables and used to make AJAX requests and trigger animations. Observables are merged, concatenated, and flattened to coordinate the asynchronous events and animations over time. Functional programming concepts like map, filter, and reduce are used to transform and combine the observable streams.
RxJS is a library for composing asynchronous and event-based programs by using observable sequences. It provides operators that allow transforming, filtering, and combining streams of data from diverse sources. Key features include:
- Representing asynchronous data streams with Observables
- Providing LINQ-like operators for querying and transforming streams
- Using Schedulers to control concurrency and synchronize streams with other asynchronous operations like user interactions, server requests, etc.
This document discusses Apache Storm, an open-source distributed real-time computation system for processing streaming data. Storm provides fault tolerance and can scale to large clusters. It uses a spout and bolt programming model where spouts emit streams of data tuples that are processed by bolts. Storm guarantees that every tuple will be fully processed through message tracking and retries. It can scale horizontally by adding machines and increasing parallelism across workers, executors, and tasks.
W3C HTML5 KIG-How to write low garbage real-time javascriptChanghwan Yi
This document summarizes techniques for writing low-garbage real-time JavaScript code. It discusses how to avoid object allocation using syntax like {} and [] instead of the new keyword. It also recommends reusing objects by wiping their properties instead of creating new ones. Functions should be created at startup instead of during runtime. Vector objects should be returned as individual values instead of vector objects. While avoiding garbage entirely is difficult, these techniques can help craft responsive real-time JavaScript with minimal garbage collector overhead.
Streams are Node’s best and most misunderstood idea. In this talk, I try to explain the concept of streams as simple as possible. We also do live coding and solve some real time problems using streams.
The document describes methods for getting quadrants of a quadtree data structure:
- The southWest method returns a new quadtree representing the southwestern quadrant, with origins and sizes set accordingly.
- The southEast method similarly returns a new quadtree for the southeastern quadrant, with origins and sizes of that region.
- Both methods take the existing quadtree as an argument and return a new subtree quadtree representing the specified quadrant region.
The document discusses how to use RxJS (Reactive Extensions library for JavaScript) to treat events like arrays by leveraging Observable types and operators. It explains key differences between Observables and Promises/Arrays, how Observables are lazy and cancelable unlike Promises. Various RxJS operators like map, filter, interval and fromEvent are demonstrated for transforming and composing Observable streams. The document aims to illustrate how RxJS enables treating events as collections that can be processed asynchronously over time.
This document provides best practices for embedded firmware design to make the development process less painful. It recommends using C instead of C++ for firmware programming due to its portability, speed, and clear behavior. State machines should be used everywhere to manage complexity, avoid rare bugs, and make code more testable and reusable. A modular design separates behavior from hardware to enable faster desktop debugging. A hardware abstraction layer isolates hardware interfaces from behavior for portability. On-device debugging should only be used as a last resort due to its slowness compared to desktop debugging.
Sujet bac info 2013 g1, g2 et g3 avec correctionborhen boukthir
This document contains the code for 3 Pascal programs related to numerical analysis exercises:
1. The first program calculates the area under a curve using the rectangle and trapezoid methods, outputting the results to a file.
2. The second program takes user input of phrases and encrypts each phrase by shifting the letters based on their position in the phrase. The original and encrypted phrases are written to files.
3. The third program takes a matrix as input and finds the longest consecutive sequence of nonzero elements in each row, recording the results. It identifies the longest overall sequence and outputs the details.
RxJS101 - What you need to know to get started with RxJS tomorrowViliam Elischer
This document provides an overview of RxJS, a library for composing asynchronous and event-based programs using observable sequences. It discusses key RxJS concepts like Observables, Observers, Operators, and how to create and use Observables. It also provides learning resources and highlights improvements in RxJS 5 like compliance with the Observable specification and better performance.
This document discusses the event loop in JavaScript. It begins by explaining the call stack and memory heap in JavaScript's execution environment. It then discusses how JavaScript is single-threaded and uses an event loop to handle asynchronous tasks and callbacks. Examples are given of how setTimeout is used to illustrate the non-blocking nature of JavaScript and how the event loop processes tasks and callbacks in the queue. It concludes by mentioning how tasks like rendering and animations are handled by the event loop and discusses alternatives like web workers.
This document discusses integrating Google Maps with tilt input from a laptop. It provides code examples in C++, Ruby and Perl for reading tilt sensor data on Windows. It also shows how to combine Google Maps JavaScript API with Perl code to update the map based on tilt input detected by Perl.
Priority queues are data structures that allow efficient retrieval of the maximum or minimum element based on some ordering criteria. A binary heap implementation provides efficient insert and delete-min operations in O(log N) time on average. Elements are stored in a complete binary tree structure in array form. The insert operation bubbles the element up the tree until the heap property is satisfied. Delete-min removes the root and sinks the last element into its place, maintaining the heap property. Building the initial heap from a unsorted list takes O(N) time using the buildHeap algorithm.
This document discusses common software issues that can occur with high altitude balloon (HAB) flights and provides recommendations to help avoid problems. Some key points include:
- Software defects are common, with typical defect rates of 2-4 per thousand lines of code, so HAB software needs thorough testing.
- Real issues seen on HAB flights include computer crashes, incorrect sensor readings, premature cutdown triggers, and transmission/camera failures.
- HAB environments are harsh and software must be able to handle potential hardware failures.
- Common errors include assuming code works without testing, last-minute changes, being too clever in code, overlooking odd behaviors, copying code without understanding it, and thinking finding one bug fixes all
The document discusses using formal methods to formally construct all possible outcomes for an instruction set during program execution. It describes defining events with guards and actions to model normal operation and failure conditions. It explains how the top-level abstraction of an instruction set architecture can be iteratively refined through 32 refinements to model individual instructions like NOP. The refinements generate proof obligations to verify properties are maintained. Tool support like RODIN and event-B is used to develop the models and generate target code like C. Future work includes expanding event-B for more rigorous modeling and model checking, and applying the techniques to existing instruction set architectures.
The document discusses methods for getting the preferred MIME type for a file from its extension or path. It defines a category on NSString to initialize a string from NSData using an IANA character set name. It also shows code for getting the preferred MIME type by calling UTTypeCopyPreferredTagWithClass on the file's UTI, determined from its extension using UTTypeCreatePreferredIdentifierForTag, or from its path using LSCopyItemAttributes.
This document provides an overview of functional reactive programming (FRP) and compositional event systems (CES). It discusses how FRP approaches handling time-varying values like regular values. It presents an example of modeling game movements reactively using key press events. It also demonstrates how CES can be used to handle asynchronous workflows by turning network responses into observable streams. The document compares CES to other approaches like core.async and discusses benefits of CES like supporting multiple subscribers.
Daniel Sikar: Hadoop MapReduce - 06/09/2010 Skills Matter
This document discusses using Hadoop MapReduce on Amazon Web Services for parallel processing of large datasets in a distributed manner. It provides an example of counting word frequencies from log files using Hadoop Streaming to run MapReduce jobs with scripts. The steps shown include launching an Elastic MapReduce cluster, uploading data and scripts to S3, running a MapReduce job to count word frequencies from Wikipedia log files, and then terminating the cluster.
Ganga: an interface to the LHC computing gridMatt Williams
Ganga is a tool, designed and used by the large particle physics experiments at CERN. Written in pure Python, it delivers a clean, usable interface to allow thousands of physicists to interact with the huge computing resources available to them.
Video at https://www.youtube.com/watch?v=SSdluuVNU3Y
Running Containerized Node.js Services on AWS Elastic Beanstalkzupzup.org
The document discusses running containerized Node.js services on AWS Elastic Beanstalk (EB). It provides an overview of Docker containers, AWS, and AWS EB. It describes how to run containerized Node.js microservices on AWS EB, including using Dockerfiles, environment variables, and the AWS EB CLI. It discusses some trade-offs around setup time and costs for using this approach.
Functional Programming Patterns for the Pragmatic ProgrammerRaúl Raja Martínez
In this talk we will see a pragmatic approach to building a purely functional architecture that delivers cohesive functional components.
We will cover functional patterns such as Free Monads, Transformers, Kleisli arrows, dependently typed checked exceptions
and types as well as how they can be glued together to achieve pure functions that are composable, context free, dependently injectable and testable.
Dome project and code with instructions to run it can be found at:
https://github.com/47deg/func-architecture
Add Some Fun to Your Functional Programming With RXJSRyan Anklam
This document discusses using RxJS (Reactive Extensions for JavaScript) to add interactivity and animation to an autocomplete search widget. Key events are turned into observables and used to make AJAX requests and trigger animations. Observables are merged, concatenated, and flattened to coordinate the asynchronous events and animations over time. Functional programming concepts like map, filter, and reduce are used to transform and combine the observable streams.
RxJS is a library for composing asynchronous and event-based programs by using observable sequences. It provides operators that allow transforming, filtering, and combining streams of data from diverse sources. Key features include:
- Representing asynchronous data streams with Observables
- Providing LINQ-like operators for querying and transforming streams
- Using Schedulers to control concurrency and synchronize streams with other asynchronous operations like user interactions, server requests, etc.
This document discusses Apache Storm, an open-source distributed real-time computation system for processing streaming data. Storm provides fault tolerance and can scale to large clusters. It uses a spout and bolt programming model where spouts emit streams of data tuples that are processed by bolts. Storm guarantees that every tuple will be fully processed through message tracking and retries. It can scale horizontally by adding machines and increasing parallelism across workers, executors, and tasks.
W3C HTML5 KIG-How to write low garbage real-time javascriptChanghwan Yi
This document summarizes techniques for writing low-garbage real-time JavaScript code. It discusses how to avoid object allocation using syntax like {} and [] instead of the new keyword. It also recommends reusing objects by wiping their properties instead of creating new ones. Functions should be created at startup instead of during runtime. Vector objects should be returned as individual values instead of vector objects. While avoiding garbage entirely is difficult, these techniques can help craft responsive real-time JavaScript with minimal garbage collector overhead.
Streams are Node’s best and most misunderstood idea. In this talk, I try to explain the concept of streams as simple as possible. We also do live coding and solve some real time problems using streams.
The document describes methods for getting quadrants of a quadtree data structure:
- The southWest method returns a new quadtree representing the southwestern quadrant, with origins and sizes set accordingly.
- The southEast method similarly returns a new quadtree for the southeastern quadrant, with origins and sizes of that region.
- Both methods take the existing quadtree as an argument and return a new subtree quadtree representing the specified quadrant region.
The document discusses how to use RxJS (Reactive Extensions library for JavaScript) to treat events like arrays by leveraging Observable types and operators. It explains key differences between Observables and Promises/Arrays, how Observables are lazy and cancelable unlike Promises. Various RxJS operators like map, filter, interval and fromEvent are demonstrated for transforming and composing Observable streams. The document aims to illustrate how RxJS enables treating events as collections that can be processed asynchronously over time.
This document provides best practices for embedded firmware design to make the development process less painful. It recommends using C instead of C++ for firmware programming due to its portability, speed, and clear behavior. State machines should be used everywhere to manage complexity, avoid rare bugs, and make code more testable and reusable. A modular design separates behavior from hardware to enable faster desktop debugging. A hardware abstraction layer isolates hardware interfaces from behavior for portability. On-device debugging should only be used as a last resort due to its slowness compared to desktop debugging.
Sujet bac info 2013 g1, g2 et g3 avec correctionborhen boukthir
This document contains the code for 3 Pascal programs related to numerical analysis exercises:
1. The first program calculates the area under a curve using the rectangle and trapezoid methods, outputting the results to a file.
2. The second program takes user input of phrases and encrypts each phrase by shifting the letters based on their position in the phrase. The original and encrypted phrases are written to files.
3. The third program takes a matrix as input and finds the longest consecutive sequence of nonzero elements in each row, recording the results. It identifies the longest overall sequence and outputs the details.
RxJS101 - What you need to know to get started with RxJS tomorrowViliam Elischer
This document provides an overview of RxJS, a library for composing asynchronous and event-based programs using observable sequences. It discusses key RxJS concepts like Observables, Observers, Operators, and how to create and use Observables. It also provides learning resources and highlights improvements in RxJS 5 like compliance with the Observable specification and better performance.
This document discusses the event loop in JavaScript. It begins by explaining the call stack and memory heap in JavaScript's execution environment. It then discusses how JavaScript is single-threaded and uses an event loop to handle asynchronous tasks and callbacks. Examples are given of how setTimeout is used to illustrate the non-blocking nature of JavaScript and how the event loop processes tasks and callbacks in the queue. It concludes by mentioning how tasks like rendering and animations are handled by the event loop and discusses alternatives like web workers.
This document discusses integrating Google Maps with tilt input from a laptop. It provides code examples in C++, Ruby and Perl for reading tilt sensor data on Windows. It also shows how to combine Google Maps JavaScript API with Perl code to update the map based on tilt input detected by Perl.
Priority queues are data structures that allow efficient retrieval of the maximum or minimum element based on some ordering criteria. A binary heap implementation provides efficient insert and delete-min operations in O(log N) time on average. Elements are stored in a complete binary tree structure in array form. The insert operation bubbles the element up the tree until the heap property is satisfied. Delete-min removes the root and sinks the last element into its place, maintaining the heap property. Building the initial heap from a unsorted list takes O(N) time using the buildHeap algorithm.
This document discusses common software issues that can occur with high altitude balloon (HAB) flights and provides recommendations to help avoid problems. Some key points include:
- Software defects are common, with typical defect rates of 2-4 per thousand lines of code, so HAB software needs thorough testing.
- Real issues seen on HAB flights include computer crashes, incorrect sensor readings, premature cutdown triggers, and transmission/camera failures.
- HAB environments are harsh and software must be able to handle potential hardware failures.
- Common errors include assuming code works without testing, last-minute changes, being too clever in code, overlooking odd behaviors, copying code without understanding it, and thinking finding one bug fixes all
The document discusses using formal methods to formally construct all possible outcomes for an instruction set during program execution. It describes defining events with guards and actions to model normal operation and failure conditions. It explains how the top-level abstraction of an instruction set architecture can be iteratively refined through 32 refinements to model individual instructions like NOP. The refinements generate proof obligations to verify properties are maintained. Tool support like RODIN and event-B is used to develop the models and generate target code like C. Future work includes expanding event-B for more rigorous modeling and model checking, and applying the techniques to existing instruction set architectures.
The document discusses methods for getting the preferred MIME type for a file from its extension or path. It defines a category on NSString to initialize a string from NSData using an IANA character set name. It also shows code for getting the preferred MIME type by calling UTTypeCopyPreferredTagWithClass on the file's UTI, determined from its extension using UTTypeCreatePreferredIdentifierForTag, or from its path using LSCopyItemAttributes.
This document provides an overview of functional reactive programming (FRP) and compositional event systems (CES). It discusses how FRP approaches handling time-varying values like regular values. It presents an example of modeling game movements reactively using key press events. It also demonstrates how CES can be used to handle asynchronous workflows by turning network responses into observable streams. The document compares CES to other approaches like core.async and discusses benefits of CES like supporting multiple subscribers.
Daniel Sikar: Hadoop MapReduce - 06/09/2010 Skills Matter
This document discusses using Hadoop MapReduce on Amazon Web Services for parallel processing of large datasets in a distributed manner. It provides an example of counting word frequencies from log files using Hadoop Streaming to run MapReduce jobs with scripts. The steps shown include launching an Elastic MapReduce cluster, uploading data and scripts to S3, running a MapReduce job to count word frequencies from Wikipedia log files, and then terminating the cluster.
Ganga: an interface to the LHC computing gridMatt Williams
Ganga is a tool, designed and used by the large particle physics experiments at CERN. Written in pure Python, it delivers a clean, usable interface to allow thousands of physicists to interact with the huge computing resources available to them.
Video at https://www.youtube.com/watch?v=SSdluuVNU3Y
Running Containerized Node.js Services on AWS Elastic Beanstalkzupzup.org
The document discusses running containerized Node.js services on AWS Elastic Beanstalk (EB). It provides an overview of Docker containers, AWS, and AWS EB. It describes how to run containerized Node.js microservices on AWS EB, including using Dockerfiles, environment variables, and the AWS EB CLI. It discusses some trade-offs around setup time and costs for using this approach.
Functional Programming Patterns for the Pragmatic ProgrammerRaúl Raja Martínez
In this talk we will see a pragmatic approach to building a purely functional architecture that delivers cohesive functional components.
We will cover functional patterns such as Free Monads, Transformers, Kleisli arrows, dependently typed checked exceptions
and types as well as how they can be glued together to achieve pure functions that are composable, context free, dependently injectable and testable.
Dome project and code with instructions to run it can be found at:
https://github.com/47deg/func-architecture
In this first lecture, we discuss software quality, introduce the quality characteristic of maintainability, and argue that maintainability can be studied from four different points of view: (1) quality models, (2) good practices, (3) social studies, and (4) developers' studies. We discuss major works and results for these four points of view and show the last three can be used in the first one to build better quality models. We show that quality models are mandatory to make sense of any quality evaluation.
The document discusses various software development methodologies and life cycle models that have been used since the 1950s. It provides detailed descriptions of the waterfall model, spiral model, evolutionary prototyping, and staged delivery approaches. Each methodology takes different approaches to requirements analysis, design, development, testing, and deployment. The document emphasizes the importance of choosing a life cycle model that fits the needs of the specific project.
Functional Programming Patterns (NDC London 2014)Scott Wlaschin
(video of these slides available here http://fsharpforfunandprofit.com/fppatterns/)
In object-oriented development, we are all familiar with design patterns such as the Strategy pattern and Decorator pattern, and design principles such as SOLID.
The functional programming community has design patterns and principles as well.
This talk will provide an overview of some of these, and present some demonstrations of FP design in practice.
The document discusses the software design process. It begins by explaining that software design is an iterative process that translates requirements into a blueprint for constructing the software. It then describes the main steps and outputs of the design process, which include transforming specifications into design models, reviewing designs for quality, and producing a design document. The document also covers key concepts in software design like abstraction, architecture, patterns, modularity, and information hiding.
An exploration into RxJava on Android for the experienced, yet uninitiated software engineer. This presentation explores Declarative vs Imperative programming paradigms and expands the discussion into Functional Reactive Programming. It explains the benefits of the observer contract, high-order functions, and schedulers available in RxJava. It also explains the purpose of the Android integration libraries: RxAndroid, RxLifecycle, and RxBindings.
Beyond Breakpoints: A Tour of Dynamic AnalysisFastly
Despite advances in software design and static analysis techniques, software remains incredibly complicated and difficult to reason about. Understanding highly-concurrent, kernel-level, and intentionally-obfuscated programs are among the problem domains that spawned the field of dynamic program analysis. More than mere debuggers, the challenge of dynamic analysis tools is to be able record, analyze, and replay execution without sacrificing performance. This talk will provide an introduction to the dynamic analysis research space and hopefully inspire you to consider integrating these techniques into your own internal tools.
Fullstack Conference - Proxies before proxies: The hidden gems of Javascript...Tim Chaplin
Tired of console.logging your way through applications? Want a way to slice through your application without adding complexity? AOP has been the answer to these questions for object oriented languages, such as Java and C#, but is not available in Javascript. ScarletJS(https://github.com/scarletjs/scarlet) is a project that tackles AOP using a clean, fluent, performant interface.
The ScarletJS project provides Javascript developers a different way of thinking about traditional javascript problems. The project is still growing and looking into the future of what ES6 proxies will open up to the Javascript community.
The talk will highlight the problems that javascript developers face with logging application behavior, security, and more. It will discuss the benefits of identifying a cross cutting concern, and programming using aspects. The talk will highlight how thinking about a project and cross cutting concerns can lead to cleaner more SOLID code. It will also discuss the future of ES6 proxies and the benefits that they will bring.
The document provides an overview of RxJava and its advantages over traditional Java streams and callbacks. It discusses key RxJava concepts like Observables, Observers, and Subscriptions. It demonstrates how to create Observables, subscribe to them, and compose operations like filter, map, and zip. It shows how to leverage schedulers to control threading. The document also provides examples of using RxJava with HTTP requests and the Twitter API to asynchronously retrieve user profiles and tweets. It highlights scenarios where RxJava is useful, like handling asynchronous operations, and discusses some pitfalls like its learning curve and need to understand backpressure.
JavaScript is evolving with the addition of modules, platform consistency, and harmony features. Modules allow JavaScript code to be organized and avoid naming collisions. CommonJS and AMD module formats are used widely. Platform consistency is improved through polyfills that mimic future APIs for older browsers. Harmony brings language-level modules and features like destructuring assignment, default parameters, and promises to JavaScript. Traceur compiles Harmony code to existing JavaScript.
Get to know the two stateful programming models of Azure Serverless compute: workflows and actors and how these models can simplify development and how they enable stateful and long-running application patterns within Azure’s compute environments.
The document is a presentation on advanced JavaScript. It covers EcmaScript 5 features like strict mode, which helps detect bad programming practices. Strict mode is enabled by including "use strict" in global or function scope. Other ES5 changes include a native JSON object for parsing and stringifying JSON, and new array methods like indexOf, map, and filter.
SF Big Analytics 20191112: How to performance-tune Spark applications in larg...Chester Chen
Uber developed an new Spark ingestion system, Marmaray, for data ingestion from various sources. It’s designed to ingest billions of Kafka messages every 30 minutes. The amount of data handled by the pipeline is of the order hundreds of TBs. Omar details how to tackle such scale and insights into the optimizations techniques. Some key highlights are how to understand bottlenecks in Spark applications, to cache or not to cache your Spark DAG to avoid rereading your input data, how to effectively use accumulators to avoid unnecessary Spark actions, how to inspect your heap and nonheap memory usage across hundreds of executors, how you can change the layout of data to save long-term storage cost, how to effectively use serializers and compression to save network and disk traffic, and how to reduce amortize the cost of your application by multiplexing your jobs, different techniques for reducing memory footprint, runtime, and on-disk usage. CGI was able to significantly (~10%–40%) reduce memory footprint, runtime, and disk usage.
Speaker: Omkar Joshi (Uber)
Omkar Joshi is a senior software engineer on Uber’s Hadoop platform team, where he’s architecting Marmaray. Previously, he led object store and NFS solutions at Hedvig and was an initial contributor to Hadoop’s YARN scheduler.
The Power of the JVM: Applied Polyglot Projects with Java and JavaScriptHazelcast
In this webinar
JavaScript is a powerful, flexible, and dynamically typed language. JVM is proven to be reliable and stable production platform. The power of the JVM is an ability to run programs written in different languages, including JavaScript. You can short the development cycle by leveraging a scripting abilities of JavaScript. This presentation is about JVM’s scripting capabilities that allow to mix Java and JavaScript in the same application.
In this session you’ll get introduced to the latest state of the polyglot frameworks that use JavaScript and Java side-by-side.
We’ll cover these topics:
-The JDK8’s Nashorn benefits for the server and the client side developers
-Using JavaScript and NodeJS applications and libraries on the Java platform
-Real-world projects overview that leveraging on Java-JavaScript interactions
-Live Q&A
Presenter:
Viktor Gamov, Senior Solutions Architect at Hazelcast
Viktor joined Hazelcast with over 5 years experience of architecting and building the enterprise applications using open source technologies. At his previous roles, he helped the financial companies and startups with various Java and HTML5 projects. He holds MS in Computer Science. He is a co-author of the O’Reilly book «Enterprise Web Development. From Desktop To Mobile». Viktor presented at various international conferences (http://lanyrd.com/gamussa) on Java and JavaScript related topics. He tweets at @gamussa.
pg_proctab: Accessing System Stats in PostgreSQLMark Wong
pg_proctab is a collection of PostgreSQL stored functions that provide access to the operating system process table using SQL. We'll show you which functions are available and where they collect the data, and give examples of their use to collect processor and I/O statistics on SQL queries. These stored functions currently only work on Linux-based systems.
The document discusses using pg_proctab, a PostgreSQL extension that provides functions to query operating system process and statistics tables from within PostgreSQL. It demonstrates how to use pg_proctab to monitor CPU and memory usage, I/O, and other process-level metrics for queries. The document also shows how to generate custom reports on database activity and performance by taking snapshots before and after queries and analyzing the differences.
"Немного о функциональном программирование в JavaScript" Алексей КоваленкоFwdays
This document discusses functional programming concepts in JavaScript including imperative vs declarative programming, currying, composition, functors, and the Ramda library. It provides examples of implementing curried functions, function composition, and functors in JavaScript. Functors are discussed in the context of arrays and the Maybe datatype. The Ramda library is presented as an alternative to Underscore/Lodash that follows a more functional programming style with its use of currying and function composition.
Functional Web Development – An Introduction to React.js
with Bertrand Karerangabo
Presented at FITC's Web Unleashed 2014 conference
on September 18 2014
More info at www.fitc.ca
React.js is a UI framework created by Facebook and Instagram. Its primary design goal is to help build large applications with data that changes over time. To do so at scale, conventional wisdom and some long-held assumptions about software development had to be challenged. Gone are the “M” and the “C” in MVC. Gone are templates and special HTML directives. Gone also are traditional data-bindings. The results are applications that are extremely fast and reliable, out of the box.
Bertrand Karerangabo will dive into those concepts that make React.js unique and along the way, also learn how to build web applications from simple, composable and reusable components.
OBJECTIVE
Rethink web development best practices and explore how you can build ambitious and performant application using functional programming with a virtual DOM representation.
TARGET AUDIENCE
Javascript developers working on medium to large dynamic applications.
ASSUMED AUDIENCE KNOWLEDGE
A solid understanding of Javascript and the DOM is strongly recommended.
FIVE THINGS AUDIENCE MEMBERS WILL LEARN
What React.js is and why it was built.
How to deal with the “evil” of mutable state in non-trivial applications.
A strategy for working around notoriously slow and expensive DOM operations.
The way to truly separate concerns, instead of just technologies, in an application.
The SEO, performance and usability benefits that come from using a client-side framework that plays nice with the server.
The document discusses analytics for sensor data from the Internet of Things. It provides examples of using sensor data from aircraft and connected cars for applications like optimizing flight performance, detecting anomalies, and monitoring vehicle location and driving habits. It then describes collecting accelerometer data from mobile devices, analyzing the data with Apache Spark and MLlib to identify physical activities, and storing the data in Cassandra. Algorithms like decision trees, random forests, and logistic regression are used to build predictive models to classify activities in real-time.
Rx.js allows for asynchronous programming using Observables that provide a stream of multiple values over time. The document discusses how Observables can be created from events, combined using operators like map, filter, and flatMap, and subscribed to in order to handle the stream of values. A drag and drop example is provided that creates an Observable stream of mouse drag events by combining mouse down, mouse move, and mouse up event streams. This allows treating the sequence of mouse events as a collection that can be transformed before handling the drag behavior.
Designing The Right Schema To Power Heap (PGConf Silicon Valley 2016)Dan Robinson
Heap's analytics infrastructure is built around PostgreSQL. The most important choice to make when building a system this way is the schema you'll use to represent your data. This foundation will determine your write throughput, what sorts of read queries will be fast, what indexing strategies will be available to you, and what data inconsistencies will be possible. With the wrong choice, you won't be able to leverage PostgreSQL's most powerful features.
This talk walks through the different schemas we've used to power Heap over the last three years, their relative strengths and weaknesses, and the mistakes we've made.
Stop Guessing and Start Measuring - Benchmarking Practice (Poly Version)Tobias Pfeiffer
This is the Polyconf version of the talk, including a little MJIT vs. GraalVM rebuttal, JavaScript, SQL, Ruby and Elixir to be truly Poly.
“What’s the fastest way of doing this?” - you might ask yourself during development. Sure, you can guess, your intuition might be correct - but how do you know? Benchmarking is here to give you the answers, but there are many pitfalls in setting up a good benchmark and analyzing the results. This talk will guide you through, introduce best practices, and surprise you with some unexpected benchmarking results. You didn’t think that the order of arguments could influence its performance...or did you?
JavaScript for Web Analytics is a beginner's guide to using JavaScript for web analytics. It covers JavaScript basics like data types, operators, control structures and functions. It also discusses more advanced topics like scope, closures, callbacks, asynchronous programming and the event loop. The document is intended to teach readers JavaScript concepts from very basic to more complex topics in order to understand how to use JavaScript for web analytics.
Similar to Functional Reactive Programming in JavaScript (20)
E-commerce Development Services- Hornet DynamicsHornet Dynamics
For any business hoping to succeed in the digital age, having a strong online presence is crucial. We offer Ecommerce Development Services that are customized according to your business requirements and client preferences, enabling you to create a dynamic, safe, and user-friendly online store.
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI AppGoogle
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI App
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https://sumonreview.com/ai-fusion-buddy-review
AI Fusion Buddy Review: Key Features
✅Create Stunning AI App Suite Fully Powered By Google's Latest AI technology, Gemini
✅Use Gemini to Build high-converting Converting Sales Video Scripts, ad copies, Trending Articles, blogs, etc.100% unique!
✅Create Ultra-HD graphics with a single keyword or phrase that commands 10x eyeballs!
✅Fully automated AI articles bulk generation!
✅Auto-post or schedule stunning AI content across all your accounts at once—WordPress, Facebook, LinkedIn, Blogger, and more.
✅With one keyword or URL, generate complete websites, landing pages, and more…
✅Automatically create & sell AI content, graphics, websites, landing pages, & all that gets you paid non-stop 24*7.
✅Pre-built High-Converting 100+ website Templates and 2000+ graphic templates logos, banners, and thumbnail images in Trending Niches.
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See My Other Reviews Article:
(1) AI Genie Review: https://sumonreview.com/ai-genie-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
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Neo4j - Product Vision and Knowledge Graphs - GraphSummit ParisNeo4j
Dr. Jesús Barrasa, Head of Solutions Architecture for EMEA, Neo4j
Découvrez les dernières innovations de Neo4j, et notamment les dernières intégrations cloud et les améliorations produits qui font de Neo4j un choix essentiel pour les développeurs qui créent des applications avec des données interconnectées et de l’IA générative.
A Study of Variable-Role-based Feature Enrichment in Neural Models of CodeAftab Hussain
Understanding variable roles in code has been found to be helpful by students
in learning programming -- could variable roles help deep neural models in
performing coding tasks? We do an exploratory study.
- These are slides of the talk given at InteNSE'23: The 1st International Workshop on Interpretability and Robustness in Neural Software Engineering, co-located with the 45th International Conference on Software Engineering, ICSE 2023, Melbourne Australia
GraphSummit Paris - The art of the possible with Graph TechnologyNeo4j
Sudhir Hasbe, Chief Product Officer, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
SOCRadar's Aviation Industry Q1 Incident Report is out now!
The aviation industry has always been a prime target for cybercriminals due to its critical infrastructure and high stakes. In the first quarter of 2024, the sector faced an alarming surge in cybersecurity threats, revealing its vulnerabilities and the relentless sophistication of cyber attackers.
SOCRadar’s Aviation Industry, Quarterly Incident Report, provides an in-depth analysis of these threats, detected and examined through our extensive monitoring of hacker forums, Telegram channels, and dark web platforms.
WhatsApp offers simple, reliable, and private messaging and calling services for free worldwide. With end-to-end encryption, your personal messages and calls are secure, ensuring only you and the recipient can access them. Enjoy voice and video calls to stay connected with loved ones or colleagues. Express yourself using stickers, GIFs, or by sharing moments on Status. WhatsApp Business enables global customer outreach, facilitating sales growth and relationship building through showcasing products and services. Stay connected effortlessly with group chats for planning outings with friends or staying updated on family conversations.
Do you want Software for your Business? Visit Deuglo
Deuglo has top Software Developers in India. They are experts in software development and help design and create custom Software solutions.
Deuglo follows seven steps methods for delivering their services to their customers. They called it the Software development life cycle process (SDLC).
Requirement — Collecting the Requirements is the first Phase in the SSLC process.
Feasibility Study — after completing the requirement process they move to the design phase.
Design — in this phase, they start designing the software.
Coding — when designing is completed, the developers start coding for the software.
Testing — in this phase when the coding of the software is done the testing team will start testing.
Installation — after completion of testing, the application opens to the live server and launches!
Maintenance — after completing the software development, customers start using the software.
Revolutionizing Visual Effects Mastering AI Face Swaps.pdfUndress Baby
The quest for the best AI face swap solution is marked by an amalgamation of technological prowess and artistic finesse, where cutting-edge algorithms seamlessly replace faces in images or videos with striking realism. Leveraging advanced deep learning techniques, the best AI face swap tools meticulously analyze facial features, lighting conditions, and expressions to execute flawless transformations, ensuring natural-looking results that blur the line between reality and illusion, captivating users with their ingenuity and sophistication.
Web:- https://undressbaby.com/
Using Query Store in Azure PostgreSQL to Understand Query PerformanceGrant Fritchey
Microsoft has added an excellent new extension in PostgreSQL on their Azure Platform. This session, presented at Posette 2024, covers what Query Store is and the types of information you can get out of it.
Introducing Crescat - Event Management Software for Venues, Festivals and Eve...Crescat
Crescat is industry-trusted event management software, built by event professionals for event professionals. Founded in 2017, we have three key products tailored for the live event industry.
Crescat Event for concert promoters and event agencies. Crescat Venue for music venues, conference centers, wedding venues, concert halls and more. And Crescat Festival for festivals, conferences and complex events.
With a wide range of popular features such as event scheduling, shift management, volunteer and crew coordination, artist booking and much more, Crescat is designed for customisation and ease-of-use.
Over 125,000 events have been planned in Crescat and with hundreds of customers of all shapes and sizes, from boutique event agencies through to international concert promoters, Crescat is rigged for success. What's more, we highly value feedback from our users and we are constantly improving our software with updates, new features and improvements.
If you plan events, run a venue or produce festivals and you're looking for ways to make your life easier, then we have a solution for you. Try our software for free or schedule a no-obligation demo with one of our product specialists today at crescat.io
E-commerce Application Development Company.pdfHornet Dynamics
Your business can reach new heights with our assistance as we design solutions that are specifically appropriate for your goals and vision. Our eCommerce application solutions can digitally coordinate all retail operations processes to meet the demands of the marketplace while maintaining business continuity.
Atelier - Innover avec l’IA Générative et les graphes de connaissancesNeo4j
Atelier - Innover avec l’IA Générative et les graphes de connaissances
Allez au-delà du battage médiatique autour de l’IA et découvrez des techniques pratiques pour utiliser l’IA de manière responsable à travers les données de votre organisation. Explorez comment utiliser les graphes de connaissances pour augmenter la précision, la transparence et la capacité d’explication dans les systèmes d’IA générative. Vous partirez avec une expérience pratique combinant les relations entre les données et les LLM pour apporter du contexte spécifique à votre domaine et améliorer votre raisonnement.
Amenez votre ordinateur portable et nous vous guiderons sur la mise en place de votre propre pile d’IA générative, en vous fournissant des exemples pratiques et codés pour démarrer en quelques minutes.
Transform Your Communication with Cloud-Based IVR SolutionsTheSMSPoint
Discover the power of Cloud-Based IVR Solutions to streamline communication processes. Embrace scalability and cost-efficiency while enhancing customer experiences with features like automated call routing and voice recognition. Accessible from anywhere, these solutions integrate seamlessly with existing systems, providing real-time analytics for continuous improvement. Revolutionize your communication strategy today with Cloud-Based IVR Solutions. Learn more at: https://thesmspoint.com/channel/cloud-telephony
UI5con 2024 - Keynote: Latest News about UI5 and it’s EcosystemPeter Muessig
Learn about the latest innovations in and around OpenUI5/SAPUI5: UI5 Tooling, UI5 linter, UI5 Web Components, Web Components Integration, UI5 2.x, UI5 GenAI.
Recording:
https://www.youtube.com/live/MSdGLG2zLy8?si=INxBHTqkwHhxV5Ta&t=0
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
Unveiling the Advantages of Agile Software Development.pdfbrainerhub1
Learn about Agile Software Development's advantages. Simplify your workflow to spur quicker innovation. Jump right in! We have also discussed the advantages.
19. F + R + P
■ Powerful Composition and Aggregation of
streams
■ Good fit for concurrent and event-driven
systems
■ Declarative
■ Easy to test
20. Observables
■ Stream of data over time
■ Hot vs Cold Observables
■ Asynchronous
■ Lazy
■ queryable, bufferable, pausable…
■ more than 120 operations
28. .distinctUntilChanged() // only if changes
.flatMapLatest(doAsyncSearch() // do async search on server
.retry(3))
.takeUntil(cancelStream) // chancel stream
.subscribe(
function (data) { // do UI stuff },
function (error) { // do error handling }
);
Autocomplete 2/2
29. Drag & Drop 1/2
var mousedown = Rx.Observable.fromEvent(dragTarget, 'mousedown');
var mousemove = Rx.Observable.fromEvent(document, 'mousemove');
var mouseup = Rx.Observable.fromEvent(dragTarget, 'mouseup');
30. mousedown.flatMap(function (md) {
// get starting coordinates
var startX = md.offsetX, startY = md.offsetY;
return mousemove.map(function (mm) {
// return the mouse distance from start
return {left: mm.clientX - startX, top: mm.clientY - startY };
}).takeUntil(mouseup);
}).subscribe(function (pos) {
// do UI stuff
});
31. Some Cool Stuff on Observables
.bufferWithTime(500)
.pausable(pauser), .pausableBuffered(..)
.repeat(3)
.skip(1), skipUntilWithTime(..)
.do() // for side-effects like logging
.onErrorResumeNext(second) // resume with other obs
.window() // project into windows
.timestamp() // add time for each value
.delay()
36. Conclusion
■ There is a learning curve
■ Great abstraction for async & events
■ Improves
● Readability
● Reusability
● Scalability
■ Both on the front- and backend