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Underscore.js is a utility-belt library for JavaScript offering functional programming support. It provides an extensive range of utility functions for common programming tasks without extending any of the core JavaScript objects. These utility functions include, but are not limited to, operations for iterating over arrays and objects, manipulating and testing values, creating composite functions, and more. These operations are particularly useful when dealing with collections and arrays of data.
Usage of underscore.js is quite intuitive. To use it in your project, you need to first include it. You can install it using npm with the command npm install underscore. Once installed, you can import and use the functions provided by the underscore.js library in your JavaScript code.
Here's an example where we import underscore, and then use its _.each function to iterate over an array:
var _ = require('underscore');
var arr = [1, 2, 3, 4, 5];
_.each(arr, function(num){
console.log(num);
});
In this code snippet, _.each function is used to loop over the array and print each number to the console.
Documentation for Underscore.js, including a comprehensive API reference detailing all of the library's functions, is available on the official Underscore.js website at https://underscorejs.org. This reference guide provides in-depth information on each function's usage, notes, and examples.
