Oct 20, 2010 · To make an independent copy of an array rather than a copy of the refence to it, you can use the array slice method. Example: var oldArray = ["mip", "map", "mop"]; var …

Apr 11, 2019 · slice returns a shallow copy of an array based on the provided start/end index you provide. If we want the first 3 elements: [ 1 , 2 , 3 , 4 , 5 ].slice( 0 , 3 ); // [1, 2, 3] // Starts at …

Nov 9, 2024 · In JavaScript, cloning an array means creating a new array with the same elements as the original array without modifying the original array. Here are some common use cases …

Aug 11, 2023 · There are several ways to copy or clone an array in JavaScript. Here are some common methods with examples. 1. Shallow Copy Methods. The spread operator (`…`) …

Oct 2, 2023 · We can use this function to copy an array by passing an empty array as the target object and the original array as the source object. We can also pass a true value as the first …

Feb 7, 2023 · We simply loop over the original array and push each element to the new array. newArr.push(arr[i]); The spread operator is one of the fastest methods and was introduced …

Jul 12, 2022 · In JavaScript, arrays are passed by reference. Learn 5 different ways to clone an array, including using the spread operator.

Jul 29, 2020 · There are several easy ways to clone an array in JavaScript. You can use the Array#slice() method, or the spread operator. // Clone using `slice()` const arr2 = arr.slice(); …

Basically, the slice() operation clones the array and returns a reference to a new array. For references, strings and numbers (and not the actual object), slice() copies object references …

Apr 28, 2025 · The Array.concat() method in JavaScript copies array items into another array by merging the original array with one or more arrays or values. JavaScript const a1 = [ 1 , 2 , 3 , …