Remove an Item from Array using UnderscoreJS Last Updated : 19 Jul, 2024 Comments Improve Suggest changes Like Article Like Report Underscore.js is a JavaScript library that provides a wide range of utility functions for working with arrays, objects, functions, and more. One common task when working with arrays is removing an item based on a specific condition. In this article, we will explore options to remove an item from an array using Underscore.js.Table of Content Using _.without() MethodUsing _.filter() MethodUsing _.reject() MethodApproach 1: Using _.without() MethodThe _.without() method creates a new array with all occurrences of a specified value removed. HTML <!DOCTYPE html> <html> <head> <script src= "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> </script> </head> <body> <script> let array = [1, 2, 3, 4, 5]; let newArray = _.without(array, 3); console.log(newArray); </script> </body> </html> Output: This output will display on console.[1, 2, 4, 5]Approach 2: Using _.filter() MethodThe _.filter() method creates a new array with all elements that pass the test implemented by the provided function. HTML <!DOCTYPE html> <html> <head> <script src= "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> </script> </head> <body> <script> let array = [1, 2, 3, 4, 5]; let newArray = _.filter(array, function(item) { return item !== 3; }); console.log(newArray); </script> </body> </html> Output:[1,2,4,5]Approach 3: Using _.reject() MethodThe _.reject() method is the opposite of _.filter(), creating a new array with all elements that do not pass the test implemented by the provided function. HTML <!DOCTYPE html> <html> <head> <script src= "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> </script> </head> <body> <script> let array = [1, 2, 3, 4, 5]; let newArray = _.reject(array, function(item) { return item === 3; }); console.log(newArray); </script> </body> </html> Output:[1,2,4,5]Approach 4: Using _.findIndex() and Array.splice() MethodsAnother effective way to remove an item from an array using Underscore.js is by combining the _.findIndex() method with the native Array.splice() method. The _.findIndex() method helps find the index of the first element that satisfies a provided condition, and then Array.splice() can be used to remove the element at that index.Example: Implementation of a program to remove an item from an array using _.findIndex() and Array.splice() methods JavaScript const _ = require('underscore'); function removeItem(arr, condition) { const index = _.findIndex(arr, condition); if (index !== -1) { arr.splice(index, 1); } return arr; } // Example usage: let arr = [1, 2, 3, 4, 5]; console.log(removeItem(arr, num => num === 3)); arr = [10, 20, 30, 40, 50]; console.log(removeItem(arr, num => num === 20)); Output:[1,2,4,5][10,30,40,50] Comment More infoAdvertise with us Next Article Remove an Item from Array using UnderscoreJS V vkash8574 Follow Improve Article Tags : JavaScript Web Technologies JavaScript - Underscore.js JavaScript-Questions Similar Reads Non-linear Components In electrical circuits, Non-linear Components are electronic devices that need an external power source to operate actively. 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