JavaScript for, for...in, for...of, for-await...of difference All In One

JavaScript for, for...in, for...of, for-await...of difference All In One

for

for...in

for...of

for-await...of

Array

1. forEach
2. map
3. filter
4. reduce
5. sort
   
   ...

refs

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for-await...of

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for

for-each...in

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for-each...in

https://developer.mozilla.org/en-US/docs/Archive/Web/JavaScript/for_each...in

The for each...in statement is deprecated as the part of ECMA-357 (E4X) standard. E4X support has been removed. Consider using for...of instead.

不赞成for ... in语句作为ECMA-357（E4X）标准的一部分。 E4X支持已被删除。考虑使用for ... of。

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