数组去重

转载地址  https://www.jb51.net/article/118657.htmjavascript 好记性不如烂笔头。敲一敲 贼鸡儿方便的ES6   Setjava let arr = [1,2,3,3]; let newA = Array.from(new Set(arr)); console.log(newA);//[1, 2, 3] 双层循环，外层循环元素，内层循环时比较值数组

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