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This article mainly introduces the relevant knowledge of "what are the methods of removing repetition of ES6 array". The editor shows you the operation process through an actual case. The method of operation is simple and fast, and it is practical. I hope this article "what are the methods of removing duplicates of ES6 array" can help you solve the problem.

Five methods: 1, using Set structure and Array.from (), syntax "Array.from (new Set (arr))"; 2, using Set structure and extension operator, syntax "[... new Set (arr)]"; 3, traversing the array, using indexOf () to remove duplicates in the loop body, and so on.

The operating environment of this tutorial: windows7 system, ECMAScript version 6, Dell G3 computer.

Five methods of removing duplicates in ES6 Array

1. Set data structure and Array.from () deduplication

Let arr=; let newArr=Array.from (new Set (arr)); console.log (newArr)

2. Set data structure and extension operator "..." Deweighting

Let arr= [1 new Set (arr)]; console.log (newArr)

3. Using single-layer cycle + indexOf to remove weight.

Var arr= [1, 2, 3, 3, 2, "1", 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1,

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