Comments (9)
kangax
commented on July 28, 2024
what about it?
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Yaffle
commented on July 28, 2024
I think, Traceur does not provide Map, Set and WeakMap support
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kangax
commented on July 28, 2024
@arv could you shed some light on this?
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arv
commented on July 28, 2024
Traceur does not provide any of these. Traceur is mostly focusing on new syntax and semantics and not polyfills. Existing polyfills ashtray work great with Traceur. No need to duplicate them.
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Yaffle
commented on July 28, 2024
@arv, but existing polyfills for Map and Set can not provide O(1) performance for object as keys, seems
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arv
commented on July 28, 2024
If you can mutate object keys you can get O(1) which is the standard solution.
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Yaffle
commented on July 28, 2024
@arv, ok, what about WeakMap ?
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arv
commented on July 28, 2024
Where did that "ashtray" come from? Stupid Android auto complete!
@Yaffle WeakMaps cannot be fully emulated. The closest thing is to store the association as an expando on the key itself. Once again this require extensible keys.
Here is one:
https://github.com/Polymer/WeakMap
This is not complete but it is very small and it has been highly optimized for speed.
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Yaffle
commented on July 28, 2024
anyway,
Map, Set, WeakMap should be setted as not supported for "Traceur" column
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