How to remove the weight of JavaScript
This article will explain in detail how to weigh JavaScript for you. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.
Deweighting
1. The ultimate piece
Array.from (new Set) / / [1 new Set ([1, 2, 3, 3, 4))] / / [1, 2, 3, 3, 4, and 4].
Set is a new data type from ES6 that defines non-repeating arrays.
Array.from converts an array of classes to an array
... Is an extension operator that converts values in set into strings
two。 The beginning
Array.prototype.distinct = function () {var arr = this, result = [], I, j, len = arr.length; for (I = 0; I < len; itemized +) {for (j = I + 1; j < len; juniper +) {if (arr [I] = arr [j]) {j = + + I;}} result.push (arr [I]);} return result;} [1pr 2, 3pr 3, Jing 4].
Take the stored value of the new array and cycle through the comparison of the two array values
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