[Edit]

JavaScript - reorder array

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Created by:

Jan-Alfaro

681

In this article, we would like to show you how to reorder an array in JavaScript.

Quick solution:

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const array = ['a', 'b', 'c', 'd'];
​
const indexFrom = 0; // index to move element from ('a' element)
const indexTo = 2;   // index to move element to
​
array.splice(indexTo, 0, array.splice(indexFrom, 1)[0]);
​
console.log(array); // [ 'b', 'c', 'a', 'd' ]

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Extend `Array.prototype`

Edit

In this example, we add a moveElement() function to Array.prototype so we can use it on any array to move an element from indexFrom to indexTo position.

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var array = ['a', 'b', 'c', 'd'];
​
Array.prototype.moveElement = function(indexFrom, indexTo) {
    this.splice(indexTo, 0, this.splice(indexFrom, 1)[0]);
};
​
array.moveElement(0, 2);
​
console.log(array); // [ 'b', 'c', 'a', 'd' ]