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Lodash _.rest

Overview

Introduction: The lodash _.rest method is a functional programming method in JavaScript that is used to create a new array that contains all the elements except for the first element of an existing array. The created array is a shallow copy of the original array, which means that it does not modify the original array. The _.rest method is defined in the lodash library, which is a popular utility library that provides over 300 methods to interact with JavaScript objects.

Syntax: _.rest(array)

Parameters:

  • array (Array): The array to query.

Returns: (Array): Returns the slice of array.

Examples:

Using _.rest on an array of numbers:

const _ = require('lodash');

const numbers = [1, 2, 3, 4, 5];

const restNumbers = _.rest(numbers);

console.log(restNumbers); // Output: [2, 3, 4, 5]

Using _.rest on an array of strings:

const _ = require('lodash');

const strings = ['apple', 'banana', 'cherry', 'date', 'elderberry'];

const restStrings = _.rest(strings);

console.log(restStrings); // Output: ['banana', 'cherry', 'date', 'elderberry']

Using _.rest on an array of objects:

const _ = require('lodash');

const objects = [{ name: 'John', age: 20 }, { name: 'Michael', age: 30 }, { name: 'Sarah', age: 25 } ];

const restObjects = _.rest(objects);

console.log(restObjects); // Output: [{ name: 'Michael', age: 30 }, { name: 'Sarah', age: 25 }]

Conclusion: In conclusion, the lodash _.rest method is a useful utility method in JavaScript that allows developers to create a new array that contains all the elements except for the first element of an existing array. The method is easy to use and provides support for all types of arrays including arrays of numbers, strings, and objects. The lodash library comes with many other useful methods that can enhance the development process and improve the efficiency and readability of the code.