为什么在数组迭代中使用“for ... in”是一个坏主意?

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JavaScript 迭代 数组 37046 次浏览

为什么不能for in ,最佳实践是什么

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Hey there,

Using "for...in" doesnt have an iteration index so won't always work especially in javascript. I prefer to use 'for...of.

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