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Functional JavaScript: Introducing Functional Programming with Underscore.js Michael Fogus
Publisher: O'Reilly Media, Incorporated

In a previous post, Functional Reactive Programming in JavaScript, I wrote about functional reactive programming (FRP) using Bacon.js and RxJS. Underscore is an open source functional programming utility library for JavaScript. Jul 11, 2013 - Because the topic of the featured presentation by Richard Ashkettle was functional programming, I made sure to attend my first meeting of the newly revived Pittsburgh JavaScript meetup. It is not for gurus or functional programmers. The focus of functional programming is on returning a value, from an expression that includes function calls, rather than munging some mutable global state, or modifying state through a reference passed into a function as a . That is: R.mult(2 There are already functional style libraries for JavaScript - Underscore and Lodash are the best known - but Ramda claims that its way of doing things provides a better and more efficient form of functional programming. I usually put in an empty object as the first argument to the Underscore _.extend call so that I get a new object instead of modifying the given options object in place. Nov 21, 2013 - whether we call them frontend frameworks, UI kits, design systems, or whatever else, their purpose is clear: to help developers build functional, attractive, reliable interfaces, quickly and easily, from pre-crafted components. I was waist deep in this mass of suffering when a colleague of mine introduced me to underscore.js. ϻ�Functional JavaScript: Introducing Functional Programming with Underscore.js. Jun 26, 2013 - Tuesday, 25 June 2013 at 17:11. Nov 4, 2013 - (Though it looks like one will be introduced in ECMAScript 6.) Sets are a feature that I often . 4 days ago - The first function add is curried to create an add one function then the mult function is curried to create a multiply by 2 function and this is applied to the add one function. Have you ever had to deal with javascript code that was less than elegant and performed like it looked? Underscore provides many useful functions for working with arrays or collections of JavaScript objects, including filtering, sorting and querying. The library is composed of about 80 functions that provide functional programming support without extending the built-in javascript objects. Using underscore is as simple as If you were introduced to JavaScript by writing jQuery, then the object-oriented style might be a more comfortable choice because it follows a similar approach. Aug 12, 2013 - About Underscore.js.