When Javascript isn't Javascript
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This document discusses using Ruby code in the browser through a Ruby to JavaScript compiler called Opal. Opal allows you to write Ruby code and compile it to JavaScript, enabling the use of Ruby concepts and syntax directly in web applications. Some key points covered include how Opal maps Ruby concepts like self, nil, and truthy values to their JavaScript equivalents, a demo of a calculator application built with Opal, and answers to common questions about whether and how Ruby and JavaScript can interact when using Opal. Benchmarks are also mentioned comparing performance of Ruby code compiled to JS versus interpreting Ruby directly in the browser.
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This document provides an introduction to developing web applications using Node.js. It begins with an overview of JavaScript and Node.js, then discusses building a basic HTTP server. It outlines the components needed for a sample web application that allows users to view pages and upload files, including an HTTP server, router, request handlers, views, and file uploading. The document explains key Node.js concepts like asynchronous callbacks and event-driven programming. It serves as a guide for experienced developers new to JavaScript and Node.js.
Rjb
Rjb is a Ruby gem that allows Ruby code to interact with Java objects by wrapping them in Ruby classes, enabling Ruby applications to leverage existing Java libraries and solutions. It provides a simple API for loading Java classes and calling methods on Java objects from Ruby without requiring a full Java runtime like JRuby. The document discusses how to install, configure and use Rjb to integrate Java functionality into Ruby and Rails applications.
What does JavaScript
This document discusses JavaScript and its uses for web programming. It covers server-side and client-side programming, how browsers are designed using the MVC pattern with JavaScript, and examples of asynchronous JavaScript using Ajax and the node.js reactive framework. JSON is also discussed as a simple, human-readable data format well-suited for JavaScript's complexity. References to CouchDB are made as a database that can be accessed freely with JavaScript and provides high availability and concurrency using Erlang.
Introduction to JRuby
This document provides an introduction to JRuby, which is a Ruby interpreter rewritten in Java. It discusses motivations for using JRuby such as accessing Java libraries from Ruby and vice versa. It covers key aspects of JRuby including running Ruby code on the Java Virtual Machine, interacting with Java classes from Ruby, and inheriting from Java classes. It also benchmarks JRuby performance and outlines future directions. The document is intended to explain what JRuby is and why developers might want to use it.
React js basics
This document provides an introduction to ReactJS, including what it is, why people use it, and some basic concepts. It discusses how React is a declarative, efficient JavaScript library for building user interfaces. It also highlights some common use cases for React like building presentations, virtual reality experiences, shopping carts, online editors, and mobile apps. The document then covers prerequisites for learning React and introduces some of the main components that make up the React ecosystem like JSX, Babel, and module bundlers. It concludes with a quick "Hello World" example and outlines further topics to explore like components, state management, and other advanced React patterns.
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Languages used by web app development services remotestac x
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The Art of Tracking
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NuBank - Hyperlocal Banking
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14 th Edition of International conference on computer vision
About the event
14th Edition of International conference on computer vision
Computer conferences organized by ScienceFather group. ScienceFather takes the privilege to invite speakers participants students delegates and exhibitors from across the globe to its International Conference on computer conferences to be held in the Various Beautiful cites of the world. computer conferences are a discussion of common Inventions-related issues and additionally trade information share proof thoughts and insight into advanced developments in the science inventions service system. New technology may create many materials and devices with a vast range of applications such as in Science medicine electronics biomaterials energy production and consumer products.
Nomination are Open!! Don't Miss it
Visit: computer.scifat.com
Award Nomination: https://x-i.me/ishnom
Conference Submission: https://x-i.me/anicon
For Enquiry: Computer@scifat.com
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When Javascript isn't Javascript
- 1. When Javascript isn't Javascript Ruby in the Browser
- 2. @parasquid Chief Problem Solver at Mindvalley
- 4. Brendan Eich Douglas Crockford Mike Shaver
- 5. JavaScript is the Assembly Language of the Web
- 8. JavaScript is the new Java
- 13. SIMD is coming to Firefox, V8, and Chakra
- 14. JavaScript is so fast now that any performance impact due to inefficient code is almost negligible
- 16. It begs the question: can I use JavaScript without writing JavaScript?
- 17. why not php?
- 18. Opal Ruby to JavaScript Compiler
- 19. Opal you can precompile ruby code to js generated code is JavaScript concepts are mapped directly to underlying JavaScript features and objects when possible
- 20. Opal for the Rubyist self is compiled to this (and the runtime properly binds this to the correct self value) nil is a JavaScript var (because in Ruby, nil is an actual object)
- 21. Opal for the Rubyist "" 0 and [] is truthy true and false are of the Boolean class, not TrueClass and FalseClass strings are immutable (because js strings are immutable)
- 22. Calculator Demo
- 23. FAQA can you use js inside ruby? yes can you use ruby inside js? yes can you access the browser elements (like the location bar, control the window, etc)? yes can I use jQuery? yes
- 24. FAQA is it really ruby? yes (5,122 rubyspec since 10 June 2015) so that means you have method_missing? yes can I just write ruby without precompiling it? yes, but it's less performant
- 25. Benchmarks
- 26. but why?
- 27. some concepts can be written more expressively
- 28. application logic can easily be shared between the client and the server
- 29. you get to use a power operator http://news.softpedia.com/news/ ecmascript-2016-new-version-of- the-javascript-language- released-505625.shtml
- 30. You get to approach the same problem in different ways, which can broaden your perspective and change the way you think about programming.
- 32. @parasquid Chief Problem Solver at Mindvalley