The splice() function also lets you add elements to the middle of the array. On the other hand, `splice()` modifies the array in place.Īrr2 = arr // false Adding Elements to the Middle `arr` still has 'c', because `filter()` doesn't modify the array // in place. Remove 1 element starting at index 2 const arr2 = arr.filter( ( v, i) => i != 2) This means filter() is the better choice for applications that rely on immutability, like React apps. The key difference between these two approaches is that filter() creates a new array. You may see JavaScript projects use filter() instead of splice() to remove elements from an array. The deleteCount parameter tells splice() how many elements to delete. The start parameter tells splice() where to start modifying the array. The first 2 parameters to splice() are called start and deleteCount. Here's how you would remove 'c' using splice(): const arr = The splice() function is the only native array function that lets you remove elements from the middle of the array without creating a new array. It is most commonly used to remove elements from an array, but it can also be used to add elements to the middle of an array. The Array#splice() function lets you modify an array in-place by adding and removing elements.
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