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watab0shi/loopArray.js

Created September 2, 2020 10:36
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Loop back/forward Array
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loopArray.js
// loop back
const arr1 = [0, 1, 2, 3, 4];
arr1.splice(0, 0, arr1.slice(-1)[0]);
arr1.splice(-1, 1);
console.log(arr1);// [4, 0, 1, 2, 3]
// loop forward
const arr2 = [0, 1, 2, 3, 4];
arr2.splice(arr2.length, 0, arr2.slice(0)[0]);
arr2.splice(0, 1);
console.log(arr2);// >> [1, 2, 3, 4, 0]
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