Mastering JavaScript Design Patterns

Hints and tips

There are two excellent libraries to work with collections in a functional fashion in JavaScript: Underscore.js and Lo-Dash. Used in combination with TypeScript or Traceur, they have a very pleasant syntax and provide immense power.

For instance, finding all the members of a collection that satisfy a condition using Underscore.js looks like this:

_.filter(collection, (item) =>item.Id> 3);

This code will find all the items where the ID is greater than 3.

One of these libraries is one of the first things I add to a new project. Underscore.js is actually bundled with Backbone.js, an model-view framework.

Tasks for Grunt and Gulp exist to compile code written in TypeScript or Traceur. There is, of course, also good support for TypeScript ...