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Array.apply使用技巧
2019-11-14 07:46:32
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- `Array.apply(null, {length: 20})` - 参考: https://segmentfault.com/a/1190000011435501 - `map函数并不会遍历数组中没有初始化或者被delete的元素(有相同限制还有forEach, reduce方法)`
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