The document provides an introduction and overview of Scala concepts. In 3 sentences:
Scala is an object-oriented and functional language that runs on the Java Virtual Machine. It combines object-oriented and functional programming which allows for modularity, extensibility, and composition. The document discusses Scala concepts like expressions, types, values, classes, traits, objects, pattern matching and more to build a fundamental understanding of how Scala programs work.
Scala is a programming language that unifies object-oriented and functional programming. The document introduces Scala concepts including everything being an expression, pattern matching, and the type system. It discusses Scala's class hierarchy and data types. It also covers programming with Scala using the REPL, worksheets, and main and App objects. Finally, it provides an overview of object-oriented concepts in Scala like classes, traits, and case classes as well as functional concepts like anonymous functions, higher-order functions, and immutability.
Introduction to Functional Programming with Scalapramode_ce
The document provides an introduction to functional programming with Scala. It outlines the following topics that will be covered: learning Scala syntax and writing simple programs; important functional programming concepts like closures, higher-order functions, purity, lazy evaluation, currying, tail calls, immutability, and type inference; and understanding the functional programming paradigm through Scala. It also provides some background information on Scala and examples of Scala code demonstrating various concepts.
This document provides an overview of Scala fundamentals including:
- Scala is a programming language for the JVM that supports both object-oriented and functional paradigms.
- It defines variables, values, lazy values, functions, types, classes, objects, traits, and higher-order functions.
- Classes can extend other classes and traits, allowing for multiple inheritance. Objects are used as singletons.
- Functional concepts like immutability, anonymous functions, and higher-order functions are supported.
This document provides an overview of functional programming concepts like first-class functions, pure functions, and immutable data structures. It discusses functional programming languages like Haskell, Scala, and Clojure and provides examples of code in each. The document also covers core FP topics like avoiding side effects, persistent data structures, and functional patterns in Clojure like atoms for mutable state and macros.
This document provides an overview of functional programming concepts in Scala including:
- Scala supports both object-oriented and functional programming paradigms.
- Functional programming avoids side effects and uses immutable data and pure functions.
- Scala supports first-class functions, higher-order functions, and functional data structures like Options and Try.
- Functional patterns like mapping, filtering, and pattern matching help express programs concisely in a referentially transparent style.
Scala Intro training @ Lohika, Odessa, UA.
This is a basic Scala Programming Language overview intended to evangelize the language among any-language programmers.
Short (45 min) version of my 'Pragmatic Real-World Scala' talk. Discussing patterns and idioms discovered during 1.5 years of building a production system for finance; portfolio management and simulation.
Scala is a programming language that unifies object-oriented and functional programming. The document introduces Scala concepts including everything being an expression, pattern matching, and the type system. It discusses Scala's class hierarchy and data types. It also covers programming with Scala using the REPL, worksheets, and main and App objects. Finally, it provides an overview of object-oriented concepts in Scala like classes, traits, and case classes as well as functional concepts like anonymous functions, higher-order functions, and immutability.
Introduction to Functional Programming with Scalapramode_ce
The document provides an introduction to functional programming with Scala. It outlines the following topics that will be covered: learning Scala syntax and writing simple programs; important functional programming concepts like closures, higher-order functions, purity, lazy evaluation, currying, tail calls, immutability, and type inference; and understanding the functional programming paradigm through Scala. It also provides some background information on Scala and examples of Scala code demonstrating various concepts.
This document provides an overview of Scala fundamentals including:
- Scala is a programming language for the JVM that supports both object-oriented and functional paradigms.
- It defines variables, values, lazy values, functions, types, classes, objects, traits, and higher-order functions.
- Classes can extend other classes and traits, allowing for multiple inheritance. Objects are used as singletons.
- Functional concepts like immutability, anonymous functions, and higher-order functions are supported.
This document provides an overview of functional programming concepts like first-class functions, pure functions, and immutable data structures. It discusses functional programming languages like Haskell, Scala, and Clojure and provides examples of code in each. The document also covers core FP topics like avoiding side effects, persistent data structures, and functional patterns in Clojure like atoms for mutable state and macros.
This document provides an overview of functional programming concepts in Scala including:
- Scala supports both object-oriented and functional programming paradigms.
- Functional programming avoids side effects and uses immutable data and pure functions.
- Scala supports first-class functions, higher-order functions, and functional data structures like Options and Try.
- Functional patterns like mapping, filtering, and pattern matching help express programs concisely in a referentially transparent style.
Scala Intro training @ Lohika, Odessa, UA.
This is a basic Scala Programming Language overview intended to evangelize the language among any-language programmers.
Short (45 min) version of my 'Pragmatic Real-World Scala' talk. Discussing patterns and idioms discovered during 1.5 years of building a production system for finance; portfolio management and simulation.
This document introduces developing a Scala DSL for Apache Camel. It discusses using Scala techniques like implicit conversion, passing functions as parameters, by-name parameters and currying to build a DSL. It provides examples of building simple routes in the Scala DSL using these techniques and compares them to the Java DSL. It also covers some caveats like interactions between Java and Scala generics and operator precedence. The goal is to introduce basic Scala concepts and syntax that can be used to build a Scala DSL, using Apache Camel as an example.
Some notes about programming in Scala: it covers Scala syntax and semantics, programming techniques, idioms, patterns. Many Scala features are introduced, from basic to intermediate and advanced. These are not introductory notes, but they assume a working knowledge with some other programming language (Java, C#, C++), object-oriented programming (OOP) concepts, and functional programming (FP) concepts.
Scala is a programming language that runs on the JVM and fuses functional and object-oriented paradigms. It aims to provide functional programming for programmers with an imperative mindset. Key features include functions as first-class values, pattern matching, traits for composition, and seamless interoperability with Java. While some features appear to be language features, many are actually implemented via libraries. The Scala community is growing with adoption by companies and increasing support in tools and publications.
The document discusses Scala, a programming language designed to be scalable. It can be used for both small and large programs. Scala combines object-oriented and functional programming. It interoperates seamlessly with Java but allows developers to add new constructs like actors through libraries. The Scala community is growing, with industrial adoption starting at companies like Twitter.
The document summarizes key topics from a session on functional programming in Scala, including:
- Von Neumann architecture and bottlenecks that FP aims to address
- History of FP languages and the lambda calculus foundation
- Introduction of Scala as a language that is object-oriented, functionally, statically typed and runs on the JVM
- Examples of Scala syntax like comments, variables, classes, functions, pattern matching and more
- Discussion of functional concepts in Scala like purity, recursion, and use of traits
Akka is a toolkit for building highly concurrent, distributed, and fault-tolerant applications on the JVM. It provides actors as the fundamental unit of concurrency. Actors receive messages asynchronously and process them one at a time by applying behaviors. Akka uses a supervision hierarchy where actors monitor child actors and handle failures through configurable strategies like restart or stop. This provides clean separation of processing and error handling compared to traditional approaches.
The Scala Programming Language was presented with the goals of creating a language that better supports component software and unifies object-oriented and functional programming. Scala is statically typed and supports both object-oriented and functional programming paradigms through features like traits, views, and variance annotations. It also aims to improve on concepts from Java and other languages through ideas like mixins and compound types.
The document provides an overview of the Scala programming language. It begins with an agenda that outlines topics like differences between Java and Scala, Scala data types, variables, classes, functions, closures, exception handling and collections. It then discusses specific aspects of Scala like verbosity reduction compared to Java, functional programming influences, object-oriented features, interoperability with Java and compilation to Java bytecode. Examples are provided to illustrate Scala concepts like functions, classes, recursion, higher-order functions and exception handling. The document aims to explain Scala and reasons for differences from Java.
This document discusses how the Scala programming language unifies functional programming and object-oriented programming concepts to better support component-based software development. It presents three ways Scala unifies previously separate concepts: 1) algebraic data types are implemented as class hierarchies, 2) functions are treated as objects, and 3) modules are implemented as objects. This allows Scala to leverage the strengths of both paradigms while removing limitations of existing languages for component programming.
This document provides an introduction to Scala for Java developers. It discusses that Scala is a hybrid object-oriented and functional language that runs on the JVM and interoperates well with Java. It highlights several features of Scala that allow for more concise code compared to Java, such as type inference, expressions instead of statements, higher-order functions, and case classes.
Category theory concepts such as objects, arrows, and composition directly map to concepts in Scala. Objects represent types, arrows represent functions between types, and composition represents function composition. Scala examples demonstrate how category theory diagrams commute, with projection functions mapping to tuple accessors. Thinking in terms of interfaces and duality enriches both category theory and programming language concepts. Learning category theory provides a uniform way to reason about programming language structures and properties of data types.
This document provides an introduction to functional programming concepts and the Scala programming language. It begins with a brief history of object-oriented programming and why it became popular. It then discusses why functional programming has gained popularity in recent years due to its ability to handle parallel, reactive and distributed systems through immutable data and avoidance of mutable state. The document introduces functional programming concepts like immutable data, first-class functions and purity. It provides an example of functional-style programming in Scala. Finally, it outlines topics that will be covered about practical functional programming in Scala, including collections, functions, pattern matching and lazy evaluation.
This document provides an overview of the Scala programming language. Scala was designed to be scalable by unifying object-oriented and functional programming. It runs on the Java Virtual Machine and interoperates with Java libraries. Scala code is more concise than Java due to features like type inference, immutable data structures, and support for functional programming patterns. Popular frameworks developed using Scala include Apache Spark, Kafka, and Akka. Scala sees widespread use in domains like big data, web development, and scientific computing.
The document summarizes the agenda and content of a Scala training workshop. The agenda includes functions and evaluations, higher order functions, data and abstraction, and exercises. Key points from the document include:
- Functions can be defined conditionally and with value definitions. Blocks allow grouping of definitions and expressions. Tail recursion optimizes recursion by reusing the call stack.
- Higher order functions allow functions to be passed as parameters or returned as results. Currying transforms functions that take multiple parameters into chains of functions that each take a single parameter.
- Classes define hierarchies and traits provide flexibility for code reuse like interfaces while abstract classes are used for base classes requiring constructor arguments.
- Exercises include implementing
Martin Odersky discusses the past, present, and future of Scala over the past 5 years and next 5 years. Key points include:
- Scala has grown significantly in usage and community over the past 6 years since its first release.
- Scala 2.8 will include improvements like new collections, package objects, named/default parameters, and better tool support.
- Over the next 5 years, Scala will focus on improving concurrency and parallelism through better abstractions, analyses, and static typing support.
"The joy of Scala" - Maxim Novak / Wix
Around eight years ago I started my journey as a developer. Since then, I've played around with many languages and thought that C# offers the best developer productivity. After joining Wix two years ago, I was exposed to the amazing world of Scala and Functional Programming and never looked back.
In Scala the code is much more concise, less ceremonious, immutable by default, combines functional with object oriented, seamlessly interoperates with Java, and many software engineering patterns are already baked into the language. Most importantly - Scala is FUN! By the end of the session you too will, hopefully, convert to Scala and never look back.
Recording of the lecture (Hebrew) - https://youtu.be/TcnYTwff2xU
ScalaDays 2013 Keynote Speech by Martin OderskyTypesafe
Scala gives you awesome expressive power, but how to make best use of it? In my talk I will discuss the question what makes good Scala style. We will start with syntax and continue with how to name things, how to mix objects and functions, where (and where not) to use mutable state, and when to use which design pattern. As most questions of style, the discussion will be quite subjective, and some of it might be controversial. I am looking forward to discuss these topics with the conference attendees.
This presentation was presented at OSS camp in New Delhi. It deals with the basics of Scala language and how we can use it to build scalable Applications
This document provides an overview of the Scala programming language and discusses its usage on Android. Scala is a multi-paradigm language that integrates object-oriented and functional programming. It runs on the Java Virtual Machine and is used by companies like LinkedIn, Twitter, and The Guardian. Scala's features include being object-oriented, functional, statically typed, and expressive while allowing concise code. It supports classes, traits, pattern matching, and lazy evaluation among other things.
Scala is a multi-paradigm programming language that blends object-oriented and functional programming. It is designed to express common programming patterns in a concise, elegant, and type-safe way. Scala runs on the Java Virtual Machine and interoperates seamlessly with Java, but also integrates concepts from languages such as Haskell, ML and Ruby. Some key features of Scala include support for functional programming, a static type system with type inference, pattern matching, actors and immutable data structures.
This document introduces developing a Scala DSL for Apache Camel. It discusses using Scala techniques like implicit conversion, passing functions as parameters, by-name parameters and currying to build a DSL. It provides examples of building simple routes in the Scala DSL using these techniques and compares them to the Java DSL. It also covers some caveats like interactions between Java and Scala generics and operator precedence. The goal is to introduce basic Scala concepts and syntax that can be used to build a Scala DSL, using Apache Camel as an example.
Some notes about programming in Scala: it covers Scala syntax and semantics, programming techniques, idioms, patterns. Many Scala features are introduced, from basic to intermediate and advanced. These are not introductory notes, but they assume a working knowledge with some other programming language (Java, C#, C++), object-oriented programming (OOP) concepts, and functional programming (FP) concepts.
Scala is a programming language that runs on the JVM and fuses functional and object-oriented paradigms. It aims to provide functional programming for programmers with an imperative mindset. Key features include functions as first-class values, pattern matching, traits for composition, and seamless interoperability with Java. While some features appear to be language features, many are actually implemented via libraries. The Scala community is growing with adoption by companies and increasing support in tools and publications.
The document discusses Scala, a programming language designed to be scalable. It can be used for both small and large programs. Scala combines object-oriented and functional programming. It interoperates seamlessly with Java but allows developers to add new constructs like actors through libraries. The Scala community is growing, with industrial adoption starting at companies like Twitter.
The document summarizes key topics from a session on functional programming in Scala, including:
- Von Neumann architecture and bottlenecks that FP aims to address
- History of FP languages and the lambda calculus foundation
- Introduction of Scala as a language that is object-oriented, functionally, statically typed and runs on the JVM
- Examples of Scala syntax like comments, variables, classes, functions, pattern matching and more
- Discussion of functional concepts in Scala like purity, recursion, and use of traits
Akka is a toolkit for building highly concurrent, distributed, and fault-tolerant applications on the JVM. It provides actors as the fundamental unit of concurrency. Actors receive messages asynchronously and process them one at a time by applying behaviors. Akka uses a supervision hierarchy where actors monitor child actors and handle failures through configurable strategies like restart or stop. This provides clean separation of processing and error handling compared to traditional approaches.
The Scala Programming Language was presented with the goals of creating a language that better supports component software and unifies object-oriented and functional programming. Scala is statically typed and supports both object-oriented and functional programming paradigms through features like traits, views, and variance annotations. It also aims to improve on concepts from Java and other languages through ideas like mixins and compound types.
The document provides an overview of the Scala programming language. It begins with an agenda that outlines topics like differences between Java and Scala, Scala data types, variables, classes, functions, closures, exception handling and collections. It then discusses specific aspects of Scala like verbosity reduction compared to Java, functional programming influences, object-oriented features, interoperability with Java and compilation to Java bytecode. Examples are provided to illustrate Scala concepts like functions, classes, recursion, higher-order functions and exception handling. The document aims to explain Scala and reasons for differences from Java.
This document discusses how the Scala programming language unifies functional programming and object-oriented programming concepts to better support component-based software development. It presents three ways Scala unifies previously separate concepts: 1) algebraic data types are implemented as class hierarchies, 2) functions are treated as objects, and 3) modules are implemented as objects. This allows Scala to leverage the strengths of both paradigms while removing limitations of existing languages for component programming.
This document provides an introduction to Scala for Java developers. It discusses that Scala is a hybrid object-oriented and functional language that runs on the JVM and interoperates well with Java. It highlights several features of Scala that allow for more concise code compared to Java, such as type inference, expressions instead of statements, higher-order functions, and case classes.
Category theory concepts such as objects, arrows, and composition directly map to concepts in Scala. Objects represent types, arrows represent functions between types, and composition represents function composition. Scala examples demonstrate how category theory diagrams commute, with projection functions mapping to tuple accessors. Thinking in terms of interfaces and duality enriches both category theory and programming language concepts. Learning category theory provides a uniform way to reason about programming language structures and properties of data types.
This document provides an introduction to functional programming concepts and the Scala programming language. It begins with a brief history of object-oriented programming and why it became popular. It then discusses why functional programming has gained popularity in recent years due to its ability to handle parallel, reactive and distributed systems through immutable data and avoidance of mutable state. The document introduces functional programming concepts like immutable data, first-class functions and purity. It provides an example of functional-style programming in Scala. Finally, it outlines topics that will be covered about practical functional programming in Scala, including collections, functions, pattern matching and lazy evaluation.
This document provides an overview of the Scala programming language. Scala was designed to be scalable by unifying object-oriented and functional programming. It runs on the Java Virtual Machine and interoperates with Java libraries. Scala code is more concise than Java due to features like type inference, immutable data structures, and support for functional programming patterns. Popular frameworks developed using Scala include Apache Spark, Kafka, and Akka. Scala sees widespread use in domains like big data, web development, and scientific computing.
The document summarizes the agenda and content of a Scala training workshop. The agenda includes functions and evaluations, higher order functions, data and abstraction, and exercises. Key points from the document include:
- Functions can be defined conditionally and with value definitions. Blocks allow grouping of definitions and expressions. Tail recursion optimizes recursion by reusing the call stack.
- Higher order functions allow functions to be passed as parameters or returned as results. Currying transforms functions that take multiple parameters into chains of functions that each take a single parameter.
- Classes define hierarchies and traits provide flexibility for code reuse like interfaces while abstract classes are used for base classes requiring constructor arguments.
- Exercises include implementing
Martin Odersky discusses the past, present, and future of Scala over the past 5 years and next 5 years. Key points include:
- Scala has grown significantly in usage and community over the past 6 years since its first release.
- Scala 2.8 will include improvements like new collections, package objects, named/default parameters, and better tool support.
- Over the next 5 years, Scala will focus on improving concurrency and parallelism through better abstractions, analyses, and static typing support.
"The joy of Scala" - Maxim Novak / Wix
Around eight years ago I started my journey as a developer. Since then, I've played around with many languages and thought that C# offers the best developer productivity. After joining Wix two years ago, I was exposed to the amazing world of Scala and Functional Programming and never looked back.
In Scala the code is much more concise, less ceremonious, immutable by default, combines functional with object oriented, seamlessly interoperates with Java, and many software engineering patterns are already baked into the language. Most importantly - Scala is FUN! By the end of the session you too will, hopefully, convert to Scala and never look back.
Recording of the lecture (Hebrew) - https://youtu.be/TcnYTwff2xU
ScalaDays 2013 Keynote Speech by Martin OderskyTypesafe
Scala gives you awesome expressive power, but how to make best use of it? In my talk I will discuss the question what makes good Scala style. We will start with syntax and continue with how to name things, how to mix objects and functions, where (and where not) to use mutable state, and when to use which design pattern. As most questions of style, the discussion will be quite subjective, and some of it might be controversial. I am looking forward to discuss these topics with the conference attendees.
This presentation was presented at OSS camp in New Delhi. It deals with the basics of Scala language and how we can use it to build scalable Applications
This document provides an overview of the Scala programming language and discusses its usage on Android. Scala is a multi-paradigm language that integrates object-oriented and functional programming. It runs on the Java Virtual Machine and is used by companies like LinkedIn, Twitter, and The Guardian. Scala's features include being object-oriented, functional, statically typed, and expressive while allowing concise code. It supports classes, traits, pattern matching, and lazy evaluation among other things.
Scala is a multi-paradigm programming language that blends object-oriented and functional programming. It is designed to express common programming patterns in a concise, elegant, and type-safe way. Scala runs on the Java Virtual Machine and interoperates seamlessly with Java, but also integrates concepts from languages such as Haskell, ML and Ruby. Some key features of Scala include support for functional programming, a static type system with type inference, pattern matching, actors and immutable data structures.
Knolx Session : Built-In Control Structures in ScalaAyush Mishra
Scala has only a handful of built-in control structures including if, while, for, try, match, and function calls. These control structures can be used in both an imperative style by modifying program state, as well as a functional style by returning new values. For example, a for loop can iterate over a sequence and return a new collection with the results of the body expression.
This ppt describes basics of scala upto collections covering both object oriented and functional programming concepts of the language.
References:Scala cookbook
Martin Odersky received his PhD in 1989 and began designing Scala in 2001 at EPFL. Scala is a functional and object-oriented programming language that runs on the Java Virtual Machine. It is concise, high-level, statically typed, and supports both immutable and mutable data structures. Many large companies use Scala including LinkedIn, Twitter, and Ebay. Scala supports both object-oriented programming with classes, traits, and objects as well as functional programming with immutable data, higher-order functions, and algebraic data types.
An Introduction to Scala for Java DevelopersMiles Sabin
The document provides an introduction to Scala for Java developers. It outlines key features of Scala including cleaning up Java syntax, going beyond Java with features like case classes, traits, and pattern matching, and its functional focus including support for higher-order functions, the Option type, and for comprehensions. The document also briefly discusses the Scala IDE for Eclipse.
BCS SPA 2010 - An Introduction to Scala for Java DevelopersMiles Sabin
This document provides an introduction to Scala for Java developers. It outlines how Scala cleans up Java syntax by making semi-colons optional, using == for equals and eq for reference equality, and allowing periods to be omitted. It also describes how Scala goes beyond Java by supporting features like case classes, pattern matching, named and default arguments, and mixin composition with traits. The document provides examples of using these features and explains how Scala seamlessly interoperates with Java.
Miles Sabin Introduction To Scala For Java DevelopersSkills Matter
Scala is a programming language that blends object-oriented and functional programming styles. It is designed to interoperate with Java code and runs on the Java Virtual Machine. Some key features of Scala include case classes, pattern matching, traits for mixing behavior, and immutable data structures. Scala code compiles to Java bytecode, allowing seamless use of Java libraries and tools.
A Brief Introduction to Scala for Java DevelopersMiles Sabin
Scala is a programming language that blends object-oriented and functional programming styles. It is designed to interoperate with Java code and runs on the Java Virtual Machine. Some key features of Scala include case classes, pattern matching, traits for mixing functionality, and immutable data structures. Scala code compiles to Java bytecode, allowing seamless use of Java libraries and tools.
This document provides an introduction to the Scala programming language. It discusses what Scala is, how to get started, basic concepts like mutability and functions, and Scala features like classes, traits, pattern matching, and collections. Scala combines object-oriented and functional programming. It runs on the Java Virtual Machine and is compatible with Java. The document provides code examples to demonstrate Scala concepts and features.
Some key features of Scala include:
1. It allows blending of functional programming and object-oriented programming for more concise and powerful code.
2. The static type system allows for type safety while maintaining expressiveness through type inference, implicits, and other features.
3. Scala code interoperates seamlessly with existing Java code and libraries due to its compatibility with the JVM.
Scala is a powerful language for the JVM that is compatible with JDK 1.5+. It is a functional language maintained by Typesafe along with the community. Scala compiles to JVM bytecode like Java but has features like objects, traits, pattern matching and functional programming. James Gosling, the creator of Java, said that if he were to pick a language other than Java today, it would be Scala.
The document discusses Scala and why some developers think it could replace Java on the JVM. It provides quotes from several influential developers, including the creator of Java and Groovy, expressing their view that Scala is the best candidate to replace Java in the long run. Specifically, James Gosling says that if he had to pick another language on the JVM besides Java, it would be Scala. Charlie Nutter describes Scala as the current heir apparent to the Java throne and the momentum behind Scala is now unquestionable. James Strachan says that if he had seen the Programming in Scala book in 2003, he may have never created Groovy and that his tip for a long term replacement for Java is
Qcon2011 functions rockpresentation_scalaMichael Stal
Scala functions provide powerful ways to decompose problems and harness the benefits of functional programming. The presentation introduces core concepts of functional programming using Scala as an example language, highlighting how Scala combines object-oriented and functional programming. It presents benefits like immutability, higher-order functions, and improved concurrency while avoiding past performance issues through modern virtual machines and libraries.
Traits in Scala allow for code reuse through mixing functionality into classes. Traits can define methods and fields and can provide default implementations for some methods. Traits can be mixed into classes using "extends" or "with" and can implement rich interfaces through multiple trait composition while keeping classes thin. Traits also support stackable modifications through multiple trait mixes that modify methods in a composable way. Whether to use a trait or concrete class depends on whether the behavior is meant to be reused or not.
Traits in Scala are similar to interfaces, but much more powerful.➢A trait encapsulates method and field definitions, which can then bereused by mixing them into classes.
Introduction à Scala - Michel Schinz - January 2010JUG Lausanne
Scala is a programming language that combines object-oriented and functional programming. It runs on the JVM and is interoperable with Java. Scala is statically typed and concise.
Scala allows modeling of concepts like rational numbers and mutable cells. Classes can implement traits to mix in functionality like logging. Pattern matching makes deconstructing data structures like lists and optional values easy. The Scala library includes collections, functions, and other functional programming constructs.
Graspan: A Big Data System for Big Code AnalysisAftab Hussain
We built a disk-based parallel graph system, Graspan, that uses a novel edge-pair centric computation model to compute dynamic transitive closures on very large program graphs.
We implement context-sensitive pointer/alias and dataflow analyses on Graspan. An evaluation of these analyses on large codebases such as Linux shows that their Graspan implementations scale to millions of lines of code and are much simpler than their original implementations.
These analyses were used to augment the existing checkers; these augmented checkers found 132 new NULL pointer bugs and 1308 unnecessary NULL tests in Linux 4.4.0-rc5, PostgreSQL 8.3.9, and Apache httpd 2.2.18.
- Accepted in ASPLOS ‘17, Xi’an, China.
- Featured in the tutorial, Systemized Program Analyses: A Big Data Perspective on Static Analysis Scalability, ASPLOS ‘17.
- Invited for presentation at SoCal PLS ‘16.
- Invited for poster presentation at PLDI SRC ‘16.
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.
Utilocate offers a comprehensive solution for locate ticket management by automating and streamlining the entire process. By integrating with Geospatial Information Systems (GIS), it provides accurate mapping and visualization of utility locations, enhancing decision-making and reducing the risk of errors. The system's advanced data analytics tools help identify trends, predict potential issues, and optimize resource allocation, making the locate ticket management process smarter and more efficient. Additionally, automated ticket management ensures consistency and reduces human error, while real-time notifications keep all relevant personnel informed and ready to respond promptly.
The system's ability to streamline workflows and automate ticket routing significantly reduces the time taken to process each ticket, making the process faster and more efficient. Mobile access allows field technicians to update ticket information on the go, ensuring that the latest information is always available and accelerating the locate process. Overall, Utilocate not only enhances the efficiency and accuracy of locate ticket management but also improves safety by minimizing the risk of utility damage through precise and timely locates.
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.
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.
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI AppGoogle
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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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#AIFusionBuddyProsandCons,
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#HowDoesAIFusionBuddyWorks
Why Mobile App Regression Testing is Critical for Sustained Success_ A Detail...kalichargn70th171
A dynamic process unfolds in the intricate realm of software development, dedicated to crafting and sustaining products that effortlessly address user needs. Amidst vital stages like market analysis and requirement assessments, the heart of software development lies in the meticulous creation and upkeep of source code. Code alterations are inherent, challenging code quality, particularly under stringent deadlines.
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!
OpenMetadata Community Meeting - 5th June 2024OpenMetadata
The OpenMetadata Community Meeting was held on June 5th, 2024. In this meeting, we discussed about the data quality capabilities that are integrated with the Incident Manager, providing a complete solution to handle your data observability needs. Watch the end-to-end demo of the data quality features.
* How to run your own data quality framework
* What is the performance impact of running data quality frameworks
* How to run the test cases in your own ETL pipelines
* How the Incident Manager is integrated
* Get notified with alerts when test cases fail
Watch the meeting recording here - https://www.youtube.com/watch?v=UbNOje0kf6E
Flutter is a popular open source, cross-platform framework developed by Google. In this webinar we'll explore Flutter and its architecture, delve into the Flutter Embedder and Flutter’s Dart language, discover how to leverage Flutter for embedded device development, learn about Automotive Grade Linux (AGL) and its consortium and understand the rationale behind AGL's choice of Flutter for next-gen IVI systems. Don’t miss this opportunity to discover whether Flutter is right for your project.
Artificia Intellicence and XPath Extension FunctionsOctavian Nadolu
The purpose of this presentation is to provide an overview of how you can use AI from XSLT, XQuery, Schematron, or XML Refactoring operations, the potential benefits of using AI, and some of the challenges we face.
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
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.
Takashi Kobayashi and Hironori Washizaki, "SWEBOK Guide and Future of SE Education," First International Symposium on the Future of Software Engineering (FUSE), June 3-6, 2024, Okinawa, Japan
Odoo ERP software
Odoo ERP software, a leading open-source software for Enterprise Resource Planning (ERP) and business management, has recently launched its latest version, Odoo 17 Community Edition. This update introduces a range of new features and enhancements designed to streamline business operations and support growth.
The Odoo Community serves as a cost-free edition within the Odoo suite of ERP systems. Tailored to accommodate the standard needs of business operations, it provides a robust platform suitable for organisations of different sizes and business sectors. Within the Odoo Community Edition, users can access a variety of essential features and services essential for managing day-to-day tasks efficiently.
This blog presents a detailed overview of the features available within the Odoo 17 Community edition, and the differences between Odoo 17 community and enterprise editions, aiming to equip you with the necessary information to make an informed decision about its suitability for your business.
5. Scala Concepts
• Scala is an object oriented language in pure form:
every value is an object and every operator is a
method.
• “ + ”, “ - ”, “ * ”, “ / ” are all methods
6. Scala Concepts
• Everythingisanexpression
• Expressionisaninstructiontoexecutesomethingthatwillreturna
value.
• Anexpressionevaluatestoaresultorresultsinavalue
• Expressions, Types and Values are the fundamental building blocks
for Scala Programs. Understanding these concepts is necessary to
build a mental model of how Scala programs work.
7. Scala Concepts
In the Scala console or worksheet enter "Hello world!" and press return (in the
console) or save the worksheet. You should see an interaction similar to this:
8. In your console type “Hello world!”.toUpperCase
Scala Concepts
9. Compile time and Runtime
• Two distinct stages that a Scala program goes through: first it is
compiled, and if it compiles successfully it can then be run or
evaluated.
• It is important to understand that compile time and
runtime really are distinct, as it is this distinction that allows
us to properly understand the difference between types
and values.
• Compilation is a process of checking that a program makes
sense.
10. WhatareTypes
• Types are restrictions on our programs that limit how we can
manipulate objects.
• We have already seen two types, String and Int, and seen that
we can perform different operations depending on the type.
• The most important point about types is that expressions
have types but values do not.
16. Program with Scala (Main)
Demo01
object Demo1 {
def main (args: Array[String]): Unit = {
println(“Hello Everyone”)
println(“Welcome to today’s workshop”)
}
}
17. Program with Scala (App)
Demo02
object Demo2 extends App {
val todaysEvent = “Nairobi JVM”
lazy val fun = (0 to 4).map(x => “fun”).mkString(“ ”)
println(“Hello world”)
println(“Welcome to ” + todaysEvent + “! n”)
}
18. Scala Concepts
❖ var, val
❖ If expressions
❖ def
❖ Block expressions
❖ While - Loops
❖ For - Loops
❖ Nested Function
❖ Recursion vs Tail recursion
❖ Pattern Matching
19. Scala Concepts
Demo05
❖ val - value
A value is an expression
that cannot be changed
any further
(Immutable)
It's similar to final in
Java
❖ var - variable
Something that is able or
likely to change or be
changed (Mutable)
20. Expression with Semicolon?
= “scala”
one
Demo06
val x = 5566
val y = 87
val java = “Java” ; val scala
If you have multiple expressions in
line, you will need semicolons(;).
Otherwise you don't need it.
21. The syntax for a conditional expression is:
If(condition)
trueExpression
else
falseExpression
Where:
1. condition is an expression with Boolean type
2. trueExpression is the expression evaluated if condition evaluates
to true
3. falseExpression is the expression evaluated if condition evaluates
to false
If Expressions
Demo02
22. If Expressions
Demo07
❖ If has return value (expression)
❖ Scala has no ternary operator (? : )
val value = 0
val negative = If (value < 0 ) true else false
Everything is an expression
23. “def” starts a function definition
Result type of function
Function name
braces
Demo08
Parameters Equals sign
def max (x: Int, y: Int): Int = {
If (x > y) x else y
} Function body in Curly
def
27. Summary of def
❖ You don't need a return statement
- Last expression of a block will be the return value
❖ You don't need return type in method or function definition.
- Scalac will infer your return type in most cases. Its a good habit
to have a return type, especially if your API has a public
interface
❖ You don't need curly brackets
- If you have multiple lines of code, using curly brackets ({ }) is a
good habit
28. Block expressions (Curly brackets)
return value, then it will be assign result to
Demo012
val n = 5
val factorial = {
var result = 1
for (i <- 1 to n )
result = result * i
result
} Last expression (result) in block will be the
“factorial”
35. Recursion vs Tail - recursion
import scala.annotation.tailrec “Add annotation is a good habit. Compiler
can check whether or not it can bedef factorial(n : Int): BigInt = {
@tailrec optimised. ”
def helpFunction(acc : Int, n: Int) : BigInt = {
If (n == 0)
acc
else
helpFunction(acc * n , n -1 )
}
helpFunction(1,n)
“You have to add a return type, when the
function is recursive”
}
factorial(15000)
Demo018
36. Pattern Matching
- It can match anything
Pattern matching is a feature that is very common in functional
languages
❖ It matches a value against an expression
❖ Each pattern points to an expression
It's similar to “switch case” but its more general. There are some
differences:
- No fall through
- Each condition needs to return a value(Everything in scala is an
expression)
37. Pattern Matching
Demo019
def matchString(x : String): String = {
x match {
case “Dog” => x
case “Cat” => “Not a cat person”
case _ => “Neither Dog or Cat”
}
matchString(“Dog”)
matchString(“Human”)
39. Scala (Object Oriented)
v Classes
v Extends , with, override
v Abstract classes
v Objects,
v Companion objects
v Traits
v Case classes
40. Classes
Demo020
Primary Constructor valin constructor willgiveyoua getter
class Employee(id : Int, val name: String, address: String, var salary: Long
)
var in constructor will give you a getter and setter
val employee = new Employee(1,”Hungai”,”Kakamega”,40L)
41. Extends, with, override.
Single inheritance enables a derived class to inherit
properties and behaviour from a single parent class
❖ Scala is single inheritance like Java.
❖ Scala - extends = Java - extends
❖ Scala - with = Java - implements
❖ Scala - override = Java - @Override
42. Abstract classes.
Abstract classes are just like normal classes but can have abstract
methods and abstract fields
In scala, you don't need the keyword abstract for methods and fields
in an abstract class
43. Abstract classes.
def speaks : Unit
Demo021
abstract class Animal (val name: String) {
val footNumber: Int
val fly : Boolean Subclasses should be in the same file.
}
class Dog(name: String) extends Animal (name) {
override val footNumber : Int = 4
override val fly = false
override def speak : Unit = println(“Spark”)
}
class Bird(name : String) extends Animal(name) {
override val footNumber : Int = 2
override val fly = true
override def speaks: Unit = println(“chatter”)
}
44. Objects.
• A singleton object is declared using the object keyword.
• When a singleton object shares the same name with a class it's referred
to as a Companion object.
• A companion object and its classes can access each others private
methods or fields
46. Case Classes.
Case classes are just regular classes that are :
➔ Immutable by default
➔ Decomposable through pattern matching
➔ Compared by structural equality instead of by reference.
When you declare a case class the scala compiler does the following for you:
➔ Creates a class and its companion object
Implements the ‘apply’ method that you can use a factory. This lets you
create instances of the class without the ‘new’ keyword
47. Case classes.
Demo023
abstract class Notification
case class Email(sourceEmail: String, title: String, body: String) extends Notification.
case class SMS (sourceNumber: String, message: String) extends Notification.
case class VoiceRecording(contactName: String, link: String) extends Notification.
val emailNotification = Email(“h@hungaikev.in”,”Scavannah”,”Todays lesson”)
println(emailNotification)
53. Functional Concepts.
Demo012
Immutability (Referential Transparency - Expressions always evaluates to
the same result in any context)
- No side effects (Modifies state, Not predictable)
❖ Functions as values
- Functions as objects
Higher order functions - Input: Takes one or more functions as parameters,
Output: Returns a function as result
55. Anonymous functions.
Demo025
((x : Int ) => x * x)
(0 until 10).map ((value: Int) => value * value)
(0 until 10).map (value => value * value )
(0 until 10).map (value => value + 1)
(0 until 10).map (_ + 1)
61. Collections
❖
❖ Concept of Collections
❖ Hierarchy of Collections
- Immutable
- Mutable
❖ Immutable List
62. Collections.
❖ Scala supports mutable collections and immutable collections.
A mutable collection can be updated or extended in place. This means you
can change, add or remove elements as a side effect.
Immutable collections never change. You have still operations that stimulate
additions, removals, updates by creating a new collection and leave the old
unchanged.
68. Summary of Scala.
❖ Keep it simple
❖ Don’t pack too much in one expression
❖ Find meaningful names
❖ Prefer functional
❖ Careful with mutable objects