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Then what happens to operations that access the collection? like third argument in JavaScript's native forEach?
by msoad 12y ago
Then what happens to operations that access the collection? like third argument in JavaScript's native forEach?
- aeflash 12y agoIt's not supported. But if you're doing things right, you shouldn't need it.
- acjohnson55 12y agoThat's what a zipper [1] is good for. It gives you access to the rest of a collection relative to the current position. [1] http://en.wikipedia.org/wiki/Zipper_%28data_structure%29 http://en.wikipedia.org/wiki/Zipper_%28data_structure%29