Sep 2, 2015 · You could use SET to remove duplicates and compare, If you copy the array into a set it will remove any duplicates. Then simply compare the length of the array to the size of the …

Jul 9, 2016 · Interestingly the most obvious and elegant solution (imho) is missing: Array.prototype.reduce (...). All major browsers support this feature since about 2011 (IE) or …

JavaScript : Remove all duplicate elements from the internal arrays of the given 2-D array

Apr 7, 2025 · In JavaScript, array methods such as filter () and indexOf () can be used to find duplicates in a concise way. filter () creates a new array containing elements that satisfy a …

Mar 14, 2022 · To find duplicates in an array using JavaScript, combining the filter and indexOf methods provides an elegant solution. The filter method creates a new array with all elements …

Learn how to find duplicate values in a JavaScript array with this comprehensive guide, including examples and step-by-step instructions.

We are required to write a JavaScript function that takes in a two-dimensional array of literals. Our function should return a new array that contains all the entries from the original array but the …

Jul 3, 2021 · Learn how to check if an array contains duplicate values using indexOf (), set object, and iteration in JavaScript.

May 4, 2023 · In this article, let’s look at the different ways to find duplicates in an array in JavaScript. We’re going to be looking at different pre-defined JavaScript methods and finally …

Feb 27, 2025 · javascript 1. Using a Set for Efficient Duplicate Detection. JavaScript’s Set object is perfect for detecting duplicates because it stores only unique values. By iterating over the …