例子:var arr = [1,2,3,[5,6],[7,[8,[9]]]] 转换为 [1,2,3,4,5,6,7,8]
es6语法
arr.flat();//展开一级:[1,2,3,5,6,7,[8,[9]]]
arr.flat(2);//展开两级:[1,2,3,5,6,7,8,[9]]
arr.flat(Infinity);//Infinity:全部展开[1,2,3,4,5,6,7,8]
arr.flat();//展开一级:[1,2,3,5,6,7,[8,[9]]]
arr.flat(2);//展开两级:[1,2,3,5,6,7,8,[9]]
arr.flat(Infinity);//Infinity:全部展开[1,2,3,4,5,6,7,8]
本文标题:将数组降级
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