Underscore.js - Javascript

Underscore.js is a popular Javascript library that provides a variety of utility functions for performing common programming tasks.

Features

Some of the key features of Underscore.js include:

• Collection functions for working with arrays and objects, including map, reduce, and filter.
• Function functions for working with functions, including bind, defer, and throttle.
• Utility functions for general programming tasks, including extend, template, and noop.
• Support for chaining functions together to create more complex operations.

Installation

To use Underscore.js in your project, you can download the library and include it in your HTML code. Alternatively, you can use a package manager like npm or yarn to install the library and include it in your code using a tool like Webpack.

Usage

Here's an example of how you might use Underscore.js in a Javascript program to filter out all of the even numbers from an array:

const _ = require('underscore'); // Assume we're using Node.js

const numbers = [1, 2, 3, 4, 5, 6];
const evens = _.filter(numbers, (num) => num % 2 === 0);

console.log(evens); // Outputs [2, 4, 6]

In this example, we first import the Underscore.js library using the require function. We then create an array of numbers and use the filter function from Underscore.js to select only the even numbers. Finally, we log the resulting array to the console.

Conclusion

Underscore.js is a powerful and popular library that can help you write cleaner and more efficient Javascript code. Whether you're working with collections, functions, or just need some general utility methods, Underscore.js has you covered.