This document discusses service objects as an alternative to models in Rails applications. Services are simple objects that encapsulate business logic and are not resources. They have no attributes or state and are intended to be "method objects" that can be called from anywhere. Services should do one thing, have few dependencies, and be easily testable. The document provides examples of how to structure services in a Rails app and advantages like reusability, testability, and composability.
This document provides an overview of Elixir and Phoenix for Rubyists. It begins with background on Elixir, comparing it to Ruby and emphasizing its focus on concurrency, scalability and fault tolerance. It then covers Phoenix, describing it as a server-side web framework similar to Rails but with improved performance. Key differences between Phoenix and Rails highlighted are Phoenix's use of channels for real-time functionality and its clearer request cycle. The document concludes by outlining the directory structure for a new Phoenix project and promising a live coding demo of a simple Phoenix app.
This document provides an overview of Elixir's type system and static type checking tools. It discusses why types sometimes have a bad reputation, describes Elixir's weak dynamic typing, and covers typespecs, Dialyxr static analysis, defining custom types like structs, and parametric polymorphism. The presentation aims to demonstrate how Elixir's types can help structure code and catch bugs without boilerplate or losing expressiveness.
CoffeeScript is a programming language that transcompiles to JavaScript. It adds syntactic sugar like Ruby, Python and Haskell to enhance JavaScript's brevity and readability. Some key features include list comprehension, pattern matching, lambda functions, class statements, and optional braces and parentheses. CoffeeScript is used by companies like Dropbox, GitHub and Microsoft TypeScript. It influenced the development of ECMAScript 6.
This document discusses advanced reflection capabilities in Pharo. It describes how instance variables are currently represented as strings but could be modeled as objects using layouts and slots. It also explains how method structures are not currently modeled at a fine-grained level and proposes using abstract syntax trees (ASTs) to represent methods as objects with sub-elements like message sends, assignments, and variable access. This would enable capabilities like behavioral reflection through meta-object links on AST nodes. The document advocates "ASTs everywhere" and sub-method reflection with meta-links in future versions of Pharo.
This document provides an overview and plan for learning JavaScript. It covers introductory topics like variables, operators, functions, loops, and events. It also explains why JavaScript is important for web development as one of the three main languages, along with HTML and CSS. The document outlines how to integrate JavaScript into HTML pages and defines common JavaScript concepts.
The document introduces Elm, a functional programming language that compiles to JavaScript. It has a focus on simplicity, robustness, and helping developers avoid bugs. Some key points about Elm include its functional, immutable, and statically typed nature; built-in support for functional reactive programming; use for building rich user interfaces; and emphasis on easy refactoring and adding new features. The document also discusses Elm's syntax, type system, record handling, approach to avoiding runtime exceptions, architecture for user interface apps, and ecosystem of tools.
This document provides an overview of the Elm programming language. It discusses that Elm is a functional programming language that compiles to JavaScript, uses immutable data and pure functions. It also describes some key aspects of Elm including its strong typing, use of pattern matching, and adherence to the Elm Architecture of model-view-update. Tools for developing in Elm like elm-make and elm-repl are also mentioned.
This document discusses service objects as an alternative to models in Rails applications. Services are simple objects that encapsulate business logic and are not resources. They have no attributes or state and are intended to be "method objects" that can be called from anywhere. Services should do one thing, have few dependencies, and be easily testable. The document provides examples of how to structure services in a Rails app and advantages like reusability, testability, and composability.
This document provides an overview of Elixir and Phoenix for Rubyists. It begins with background on Elixir, comparing it to Ruby and emphasizing its focus on concurrency, scalability and fault tolerance. It then covers Phoenix, describing it as a server-side web framework similar to Rails but with improved performance. Key differences between Phoenix and Rails highlighted are Phoenix's use of channels for real-time functionality and its clearer request cycle. The document concludes by outlining the directory structure for a new Phoenix project and promising a live coding demo of a simple Phoenix app.
This document provides an overview of Elixir's type system and static type checking tools. It discusses why types sometimes have a bad reputation, describes Elixir's weak dynamic typing, and covers typespecs, Dialyxr static analysis, defining custom types like structs, and parametric polymorphism. The presentation aims to demonstrate how Elixir's types can help structure code and catch bugs without boilerplate or losing expressiveness.
CoffeeScript is a programming language that transcompiles to JavaScript. It adds syntactic sugar like Ruby, Python and Haskell to enhance JavaScript's brevity and readability. Some key features include list comprehension, pattern matching, lambda functions, class statements, and optional braces and parentheses. CoffeeScript is used by companies like Dropbox, GitHub and Microsoft TypeScript. It influenced the development of ECMAScript 6.
This document discusses advanced reflection capabilities in Pharo. It describes how instance variables are currently represented as strings but could be modeled as objects using layouts and slots. It also explains how method structures are not currently modeled at a fine-grained level and proposes using abstract syntax trees (ASTs) to represent methods as objects with sub-elements like message sends, assignments, and variable access. This would enable capabilities like behavioral reflection through meta-object links on AST nodes. The document advocates "ASTs everywhere" and sub-method reflection with meta-links in future versions of Pharo.
This document provides an overview and plan for learning JavaScript. It covers introductory topics like variables, operators, functions, loops, and events. It also explains why JavaScript is important for web development as one of the three main languages, along with HTML and CSS. The document outlines how to integrate JavaScript into HTML pages and defines common JavaScript concepts.
The document introduces Elm, a functional programming language that compiles to JavaScript. It has a focus on simplicity, robustness, and helping developers avoid bugs. Some key points about Elm include its functional, immutable, and statically typed nature; built-in support for functional reactive programming; use for building rich user interfaces; and emphasis on easy refactoring and adding new features. The document also discusses Elm's syntax, type system, record handling, approach to avoiding runtime exceptions, architecture for user interface apps, and ecosystem of tools.
This document provides an overview of the Elm programming language. It discusses that Elm is a functional programming language that compiles to JavaScript, uses immutable data and pure functions. It also describes some key aspects of Elm including its strong typing, use of pattern matching, and adherence to the Elm Architecture of model-view-update. Tools for developing in Elm like elm-make and elm-repl are also mentioned.
Dynamically Composing Collection Operations through Collection PromisesMarcus Denker
Dynamically Composing Collection Operations through Collection Promises.
Juan Pablo Sandoval Alcocer, Marcus Denker,
Alexandre Bergel, Yasett Acuran
Presented at IWST 2016
The document discusses the future of web development with functional programming languages like Elixir and Elm. It provides an overview of Elixir as a functional language that runs on the Erlang VM and is good for concurrency, distribution, and fault tolerance. It also discusses Elm as a functional language for building reactive front-end applications in a way that is robust and prevents runtime exceptions. Examples of code in Elixir and Elm are also provided.
This document summarizes a talk on reflection in Pharo. It discusses how:
1) Everything can be represented as an object in Pharo, including code, through the use of abstract syntax trees (ASTs).
2) The AST is now deeply integrated in Pharo and easily accessible. Methods can be annotated by linking meta objects to nodes in the AST.
3) When the code is executed, the links are followed to modify the behavior, allowing aspects like breakpoints or coverage to be implemented through annotation of the AST.
This document discusses new developments in variable representation in Pharo5. It notes that everything used to be represented as objects, including variables, but variables were represented via associations. In Pharo5, variables are now represented as subclasses of objects called slots and literals. This allows variables to be annotated and have custom behavior via delegation to their metaobjects during code generation. It provides examples of using simple slots, weak slots, and property slots, and outlines the roadmap for further developing the slot system in Pharo6.
This document provides an agenda and overview of a presentation on JavaScript. It introduces JavaScript, covering its history, cores, uses today, and programming paradigms. It then discusses object-oriented JavaScript, data types and structures, and control statements in JavaScript. The document also mentions functions, prototypes, and JSON before concluding with examples of libraries and frameworks that could be used in a demo program.
Apache Velocity is a Java-based template engine that allows separation of design and code through templates. It defines its own template language (VTL) and processes templates at runtime rather than compiling them. Velocity has been an Apache project since 2006, is 100% Java-based, and is used widely in projects like Struts, Turbine, and Maven for code generation, documentation, and more.
The document provides an overview of Less, a CSS pre-processor. It discusses key Less features such as variables, mixins, operations, functions, extend, loops, namespaces, and nested rules. These features allow variables, nesting, mixins, functions and many other techniques to extend CSS and make stylesheets more maintainable.
- Objects in JavaScript store key-value pairs and can contain nested objects and functions. Functions stored as object properties are called methods.
- The this keyword refers to the object a method is called on. Functions can be declared, assigned to variables as expressions, or used as constructor functions with new.
- Scopes in JavaScript are determined lexically at compile time. Variables are stored in execution contexts and functions form closures by maintaining references to outer scopes even after execution leaves them.
- JavaScript uses prototypal inheritance where objects inherit directly from other objects via the internal [[Prototype]] property. The prototype is used to lookup properties not found on the object itself.
JavaScript is an interpreted programming language that is used for client-side scripting in web browsers. It was originally developed by Brendan Eich at Netscape under the name Mocha and later LiveScript, before being standardized as ECMAScript. JavaScript can be used for client-side development in areas like jQuery, and server-side development with Node.js. It is a prototype-based, multi-paradigm scripting language that is dynamic, weak typed, and supports object-oriented, imperative, and declarative programming styles.
Functional programming in Java 8 allows for:
1) The use of lambda expressions and streams for a more declarative programming style without iteration.
2) Functional interfaces like Function, Predicate, and Consumer along with lambda expressions enable function composition and chaining.
3) Features like immutable collections help reduce mutability and side effects, important aspects of functional programming.
This document outlines the objectives of a lecture on JavaScript. It will introduce JavaScript, including using script tags and linking external JavaScript files. It will cover JavaScript expressions, operators, functions, flow control, objects, arrays, the Document Object Model, forms, cookies and more. The lecture aims to provide an overview of the JavaScript language and how it is used for client-side scripting.
TypeScript is an open-source programming language developed and maintained by Microsoft. It is a strict syntactical superset of JavaScript, and adds static typing and class-based object-oriented programming to the language. Anders Hejlsberg, the chief architect of C# and creator of Delphi and Turbo Pascal, worked on the development of TypeScript. TypeScript can be used to build JavaScript applications for execution on the client-side or server-side (Node.js). Some key features of TypeScript include static typing, support for type definitions of existing JavaScript libraries, and support for object-oriented programming.
This document provides an introduction to using Scala, including how to install Scala, use the Scala interactive console and compile Scala scripts and programs. It also discusses SBT (Scala Build Tool) for managing Scala projects and dependencies, and introduces some useful Scala frameworks like Xitrum for building web applications and Akka for building concurrent and distributed applications.
This document discusses different types of variables used by shells including environmental variables, positional parameters, and user-defined variables. It also covers getting input from users. There are three main types of variables: environmental variables which provide system information to shells, positional parameters which store command line arguments, and user-defined variables which are created and assigned values by users. The read command is used to get input from users and store it in variables.
This document discusses functional programming (FP) as an alternative to object-oriented programming (OOP). It notes issues with OOP like null pointer problems and inheritance issues. It then gives reasons for using FP like the need to write concurrent programs and handle data management problems. FP is described as using recursion instead of loops, higher-order functions, and treating programs as mathematical functions. FP avoids variables and assignments and favors immutability. Examples of FP languages provided are Erlang, Haskell and Clojure. Caution is given around maintainability, advocating for readability over one-liners. Real-world adoptions of FP at companies like Facebook and LinkedIn are also mentioned.
An Introduction to Functional Programming with JavascriptDoug Sparling
The document introduces functional programming with JavaScript. It discusses that functional programming uses functions as the basic unit of abstraction. The document outlines key concepts of functional programming like anonymous functions, first-class functions, lexical closure, and higher-order functions. It also covers common functional patterns in Underscore.js like chaining, mapping, filtering and reducing operations. The document provides examples of functional programming concepts and recommends resources to learn more about functional JavaScript.
Dynamically Composing Collection Operations through Collection PromisesMarcus Denker
Dynamically Composing Collection Operations through Collection Promises.
Juan Pablo Sandoval Alcocer, Marcus Denker,
Alexandre Bergel, Yasett Acuran
Presented at IWST 2016
The document discusses the future of web development with functional programming languages like Elixir and Elm. It provides an overview of Elixir as a functional language that runs on the Erlang VM and is good for concurrency, distribution, and fault tolerance. It also discusses Elm as a functional language for building reactive front-end applications in a way that is robust and prevents runtime exceptions. Examples of code in Elixir and Elm are also provided.
This document summarizes a talk on reflection in Pharo. It discusses how:
1) Everything can be represented as an object in Pharo, including code, through the use of abstract syntax trees (ASTs).
2) The AST is now deeply integrated in Pharo and easily accessible. Methods can be annotated by linking meta objects to nodes in the AST.
3) When the code is executed, the links are followed to modify the behavior, allowing aspects like breakpoints or coverage to be implemented through annotation of the AST.
This document discusses new developments in variable representation in Pharo5. It notes that everything used to be represented as objects, including variables, but variables were represented via associations. In Pharo5, variables are now represented as subclasses of objects called slots and literals. This allows variables to be annotated and have custom behavior via delegation to their metaobjects during code generation. It provides examples of using simple slots, weak slots, and property slots, and outlines the roadmap for further developing the slot system in Pharo6.
This document provides an agenda and overview of a presentation on JavaScript. It introduces JavaScript, covering its history, cores, uses today, and programming paradigms. It then discusses object-oriented JavaScript, data types and structures, and control statements in JavaScript. The document also mentions functions, prototypes, and JSON before concluding with examples of libraries and frameworks that could be used in a demo program.
Apache Velocity is a Java-based template engine that allows separation of design and code through templates. It defines its own template language (VTL) and processes templates at runtime rather than compiling them. Velocity has been an Apache project since 2006, is 100% Java-based, and is used widely in projects like Struts, Turbine, and Maven for code generation, documentation, and more.
The document provides an overview of Less, a CSS pre-processor. It discusses key Less features such as variables, mixins, operations, functions, extend, loops, namespaces, and nested rules. These features allow variables, nesting, mixins, functions and many other techniques to extend CSS and make stylesheets more maintainable.
- Objects in JavaScript store key-value pairs and can contain nested objects and functions. Functions stored as object properties are called methods.
- The this keyword refers to the object a method is called on. Functions can be declared, assigned to variables as expressions, or used as constructor functions with new.
- Scopes in JavaScript are determined lexically at compile time. Variables are stored in execution contexts and functions form closures by maintaining references to outer scopes even after execution leaves them.
- JavaScript uses prototypal inheritance where objects inherit directly from other objects via the internal [[Prototype]] property. The prototype is used to lookup properties not found on the object itself.
JavaScript is an interpreted programming language that is used for client-side scripting in web browsers. It was originally developed by Brendan Eich at Netscape under the name Mocha and later LiveScript, before being standardized as ECMAScript. JavaScript can be used for client-side development in areas like jQuery, and server-side development with Node.js. It is a prototype-based, multi-paradigm scripting language that is dynamic, weak typed, and supports object-oriented, imperative, and declarative programming styles.
Functional programming in Java 8 allows for:
1) The use of lambda expressions and streams for a more declarative programming style without iteration.
2) Functional interfaces like Function, Predicate, and Consumer along with lambda expressions enable function composition and chaining.
3) Features like immutable collections help reduce mutability and side effects, important aspects of functional programming.
This document outlines the objectives of a lecture on JavaScript. It will introduce JavaScript, including using script tags and linking external JavaScript files. It will cover JavaScript expressions, operators, functions, flow control, objects, arrays, the Document Object Model, forms, cookies and more. The lecture aims to provide an overview of the JavaScript language and how it is used for client-side scripting.
TypeScript is an open-source programming language developed and maintained by Microsoft. It is a strict syntactical superset of JavaScript, and adds static typing and class-based object-oriented programming to the language. Anders Hejlsberg, the chief architect of C# and creator of Delphi and Turbo Pascal, worked on the development of TypeScript. TypeScript can be used to build JavaScript applications for execution on the client-side or server-side (Node.js). Some key features of TypeScript include static typing, support for type definitions of existing JavaScript libraries, and support for object-oriented programming.
This document provides an introduction to using Scala, including how to install Scala, use the Scala interactive console and compile Scala scripts and programs. It also discusses SBT (Scala Build Tool) for managing Scala projects and dependencies, and introduces some useful Scala frameworks like Xitrum for building web applications and Akka for building concurrent and distributed applications.
This document discusses different types of variables used by shells including environmental variables, positional parameters, and user-defined variables. It also covers getting input from users. There are three main types of variables: environmental variables which provide system information to shells, positional parameters which store command line arguments, and user-defined variables which are created and assigned values by users. The read command is used to get input from users and store it in variables.
This document discusses functional programming (FP) as an alternative to object-oriented programming (OOP). It notes issues with OOP like null pointer problems and inheritance issues. It then gives reasons for using FP like the need to write concurrent programs and handle data management problems. FP is described as using recursion instead of loops, higher-order functions, and treating programs as mathematical functions. FP avoids variables and assignments and favors immutability. Examples of FP languages provided are Erlang, Haskell and Clojure. Caution is given around maintainability, advocating for readability over one-liners. Real-world adoptions of FP at companies like Facebook and LinkedIn are also mentioned.
An Introduction to Functional Programming with JavascriptDoug Sparling
The document introduces functional programming with JavaScript. It discusses that functional programming uses functions as the basic unit of abstraction. The document outlines key concepts of functional programming like anonymous functions, first-class functions, lexical closure, and higher-order functions. It also covers common functional patterns in Underscore.js like chaining, mapping, filtering and reducing operations. The document provides examples of functional programming concepts and recommends resources to learn more about functional JavaScript.
A programming paradigm is a style or approach to programming. Some common paradigms include imperative, declarative, structured, procedural, functional, object-oriented, logic-based, and constraint-based programming. Paradigms define aspects like control flow, use of variables and data, and how programmers specify programs. Many popular languages support multiple paradigms to varying degrees. Pure languages focus on a single paradigm while multi-paradigm languages facilitate multiple approaches. Paradigms are not exclusive categories as programs may incorporate elements of different styles.
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and C.
- Ruby supports functional, aspect-oriented, and design-by-contract programming paradigms. It is well-suited for practices like extreme programming.
- Core concepts include classes, modules, blocks/iterators, exceptions, regular expressions and strings. Common data structures include arrays, hashes, ranges and more.
- Examples demonstrate basic syntax like variables, loops, conditions, classes and modules. Ruby emphasizes flexibility, dynamism and "
This document provides an overview of the Ruby programming language for Perl programmers. Ruby is a dynamic, reflective, object-oriented scripting language that is similar to Perl in many ways but also differs in its stronger object-oriented focus. The document discusses Ruby's syntax, core classes, object model, modules, blocks and iterators, and other features.
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It borrows concepts from Perl, Smalltalk, Lisp, and C but has a stronger object orientation than Perl.
- Ruby places an emphasis on flexibility, dynamism, and a "human-oriented" design with principles like "least surprise." It aims to provide multiple ways to accomplish tasks.
- The document discusses Ruby's syntax, basic programming concepts like classes and modules, and core library classes like Array, IO, and String. It also notes Ruby's support for paradigms like functional programming.
This document provides an overview of the Ruby programming language for Perl programmers. Ruby is an interpreted, object-oriented scripting language that is very similar to Perl in many ways, such as its syntax for regular expressions and control structures like loops and conditionals. However, Ruby differs from Perl in that it was designed from the start to be object-oriented and highly dynamic. The document discusses Ruby's core concepts like classes, modules, blocks and iterators in detail and provides many code examples to illustrate Ruby's syntax and features.
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and C.
- Ruby supports functional, aspect-oriented, and design-by-contract programming paradigms. It is well-suited for practices like extreme programming.
- Core concepts include classes, modules, blocks/iterators, exceptions, regular expressions and strings. Common data structures include arrays, hashes, ranges and more.
- Examples demonstrate basic syntax like variables, loops, conditions, classes and modules. Ruby emphasizes flexibility, dynamism and "
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and C.
- Ruby supports functional, aspect-oriented, and design-by-contract programming paradigms. It is well-suited for practices like extreme programming.
- Core concepts include classes, modules, blocks/iterators, exceptions, regular expressions and strings. Common data structures include arrays, hashes, ranges and more.
- Examples demonstrate basic syntax like variables, loops, conditions, classes and modules. Ruby emphasizes flexibility, dynamism and "
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and C.
- Ruby supports features like classes, modules, blocks/iterators, exceptions, regular expressions and threads. Everything in Ruby is an object.
- Compared to Perl, Ruby is more object-oriented, dynamic, and has built-in support for threads. Syntax also differs in some key ways.
- The document provides examples of basic Ruby syntax like variables, loops, conditions, classes and modules to illustrate how the language works.
This document provides an overview of the Ruby programming language for Perl programmers. Ruby is an interpreted, object-oriented scripting language that is very similar to Perl in many ways, such as its syntax for regular expressions and special variables, but differs in its stronger emphasis on object-oriented principles and more dynamic features. The document discusses Ruby's history and influences, basic syntax, core classes and modules, functional programming capabilities, and ease of extension.
This document provides an overview of the Ruby programming language for Perl programmers. Ruby is an interpreted, object-oriented scripting language that is very similar to Perl in many ways, such as its syntax for regular expressions and special variables, but differs in its stronger emphasis on object-oriented principles and more dynamic features. The document discusses Ruby's history and influences, basic syntax, core programming concepts like classes and modules, and ways that Ruby code can be easily extended.
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and C.
- Ruby supports features like classes, modules, blocks/iterators, exceptions, regular expressions and threads. Everything in Ruby is an object.
- Compared to Perl, Ruby is more object-oriented, dynamic, and has built-in support for threads. Syntax also differs in some areas like conditionals.
- The document provides examples of common Ruby constructs like classes, modules, loops, conditions and built-in core classes like Array, IO
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and C.
- Ruby supports functional, aspect-oriented, and design-by-contract programming paradigms. It is well-suited for practices like extreme programming.
- Core concepts include classes, modules, blocks/iterators, exceptions, regular expressions and strings. Common data structures include arrays, hashes, ranges and more.
- Examples demonstrate basic syntax like variables, loops, conditions, classes and modules. Ruby emphasizes flexibility, dynamism and "
This document provides an overview of the Ruby programming language for Perl programmers. Ruby is a dynamic, reflective, object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and other languages. Some key points covered include Ruby's object-oriented design, syntax similarities and differences compared to Perl, core classes and features like blocks/iterators, modules and mixins, exceptions, and Ruby's open and flexible nature.
The document provides an overview of the Ruby programming language for Perl programmers. Some key points:
- Ruby is an object-oriented scripting language that is interpreted, not compiled. It draws influences from Perl, Smalltalk, Lisp, and C.
- Ruby supports functional, aspect-oriented, and design-by-contract programming paradigms. It is well-suited for practices like extreme programming.
- Core concepts include classes, modules, blocks/iterators, exceptions, regular expressions and strings. Common data structures include arrays, hashes, ranges and more.
- Examples demonstrate basic syntax like variables, loops, conditions, classes and modules. Ruby emphasizes flexibility, dynamism and "
This document provides an overview of the Ruby programming language for Perl programmers. Ruby is an interpreted, object-oriented scripting language that is very similar to Perl but also introduces significant differences. Both languages are suitable for tasks like text processing and system administration scripts. Ruby places a stronger emphasis on object-oriented principles and is more dynamic than Perl.
Basics of functional Programming by Siddharth KulkarniChandulal Kavar
You must have heard people talk about Functional programming whilst your nod apprehensively, and how cool people do functional programming. You must have heard people talk about functional purity and imperative blasphemy. But what exactly does functional programming entail? Why is it making a comeback? This talk is aimed at providing an objective and practical view of what FP can and cannot do, and how it's nothing to be scared of, what languages support functional style and how it can help alleviate some common programming problems.
Go is a general purpose programming language created by Google. It is statically typed, compiled, garbage collected, and memory safe. Go has good support for concurrency with goroutines and channels. It has a large standard library and integrates well with C. Some key differences compared to other languages are its performance, explicit concurrency model, and lack of classes. Common data types in Go include arrays, slices, maps, structs and interfaces.
Similar to A (very brief) into to Functional Programming (20)
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Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
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TrustArc Webinar - 2024 Global Privacy SurveyTrustArc
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
“An Outlook of the Ongoing and Future Relationship between Blockchain Technologies and Process-aware Information Systems.” Invited talk at the joint workshop on Blockchain for Information Systems (BC4IS) and Blockchain for Trusted Data Sharing (B4TDS), co-located with with the 36th International Conference on Advanced Information Systems Engineering (CAiSE), 3 June 2024, Limassol, Cyprus.
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/building-and-scaling-ai-applications-with-the-nx-ai-manager-a-presentation-from-network-optix/
Robin van Emden, Senior Director of Data Science at Network Optix, presents the “Building and Scaling AI Applications with the Nx AI Manager,” tutorial at the May 2024 Embedded Vision Summit.
In this presentation, van Emden covers the basics of scaling edge AI solutions using the Nx tool kit. He emphasizes the process of developing AI models and deploying them globally. He also showcases the conversion of AI models and the creation of effective edge AI pipelines, with a focus on pre-processing, model conversion, selecting the appropriate inference engine for the target hardware and post-processing.
van Emden shows how Nx can simplify the developer’s life and facilitate a rapid transition from concept to production-ready applications.He provides valuable insights into developing scalable and efficient edge AI solutions, with a strong focus on practical implementation.
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slackshyamraj55
Discover the seamless integration of RPA (Robotic Process Automation), COMPOSER, and APM with AWS IDP enhanced with Slack notifications. Explore how these technologies converge to streamline workflows, optimize performance, and ensure secure access, all while leveraging the power of AWS IDP and real-time communication via Slack notifications.
2. WHY FP?
• More structured (like goto vs OO)
• Clear & concise
• Performance, parallelism, concurrency
• Reusable, generics
• Expand your horizons!
• Become a more flexible programmer
• Have fun
3. WHAT IS FUNCTIONAL
PROGRAMMING
• Family of languages
• Not one monolithic thing
• Collection of attributes & (very) general style
4. TWO SOLUTIONSTOTHE SAME
ENTSCHEIDUNGSPROBLEM
AlanTuring Alonzo Church
Imperative (Instructions) Functional (everything is a function)
Global State (“memory”) Stateless (like REST)
Mechanistic (Turing Machine) Mathematical (Lambda Calculus)
5. CONSTELLATION OF
ATTRIBUTES
• Immutability
• Recursion
• Stateless / explicit state
• Higher-order functions
• Data types
• Type safety
• Don’t need all of these!
• Some languages enforce these more than others
• Can do some FP in traditionally “imperative” languages, too
• Java, Ruby, JavaScript, and so on
• Lazy evaluation
• Composition
• Referential transparency
• Currying & partial function application
• Reusability
• Pattern matching
6. APPROACH
• Imperative style describes how to do things
• Functional style is often declarative
• describes what things are
• …plus data and transformations between them
• Sometimes called “data oriented”
9. IMMUTABILITY, PURITY &
RECURSION
• Advantages
• Get parallelization “for free” because no shared state
• No deadlocks or strange state infection bugs
• Compact and/or “does the work for you”
• Disadvantages
• Recursion can be mind bending at first
• Recursion may have time or memory space costs
10. IMMUTABILITY MAKES SENSE
What you type What the compiler says
x = 42 Okay,“x” means 42
x Hmmm… 42!
x = 99
What are you? Some kind of liar?
“x” means 42, obviously!
x Hmmm… still 42!
11. MAPPING, FILTERS, FOLDING &
ACCUMULATION
• Much simpler to reason about & cleaner syntax
• Often has a performance advantage
# Ruby Fold Example: sum numbers
range = (0..99_999_999)
## Imperative/procedural
total = 0
i = 0
while i < range.count do
total += range[i]
i += 1
end
total
## Functional
range.reduce(:+)
• Don’t need to calculate the length of the array
• Don’t rely on a throwaway variable
## Roughly
def reduce_add(array)
return 0 if array == []
array[0] + reduce_add(array[1..-1])
end
12. LIST COMPREHENSIONS &
CONSTRAINT PROGRAMMING
-- Haskell List Comprehension
[(x, y) | x <- [50..100], y <- [1..99], x `mod` 7 == 3, x `mod` y == 42]
-- RESULT: [(87,45),(94,52)]
-- Haskell List Comprehension: INFINITE EDITION
[(x, y) | x <- [50..], y <- [1..99], x `mod` 7 == 3, x `mod` y == 42]
-- RESULT: [(87,45),(94,52),(101,59),(108,66),(115,73),(122,80),(129,87),
(136,47),(136,94),(150,54),(164,61),(171,43),(178,68),(192,50),(192,75),
(206,82),(213,57),(220,89),(234,48),(234,64),(234,96),(255,71),(262,44),
(262,55),(276,78),(290,62),(297,51),(297,85),(318,46),(318,69)…
…and so on, FOREVER, and while working with the data stream
13. FURTHER, CRAZIER STUFF
• Faster custom server
• Serves ~2 million requests/second
• Triggered a rare Linux flaw due to high throughput
• Quantum computing
• Massive truly parallel systems
• Parallelism “for free” (more or less)
14. FURTHER READING
• There is so much more!
We’ve barely scratched the surface
• Vancouver Functional Programmers
• LearnYou a Haskell for Great Good
• Clojure for the Brave andTrue
• What I Wish I Knew Before Learning Haskell
• Refactoring Ruby with Monads
• The Underscore.js Source
• Don’t Fear the Monad
• Don’t be Afraid of Functional Programming (SmashingMag)