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#weakmap — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #weakmap, aggregated by home.social.

  1. JavaScriptBuzz @[email protected] ·

    WeakMap REJECTS Primitive Keys?!

    WeakMap has a SECRET rule! It ONLY accepts objects as keys. Try to use a string and it FAILS silently. This hidden restriction will cause bugs you'll never find!

    #javascript #javascripttricks #weakmap #objectkeys #javascriptweird #javascriptquiz #codingchallenge #javascriptshorts #javascriptwtf #weakreferences #javascriptbugs #advancedjavascript

    youtube.com/watch?v=C_bVlNy3FMI

    #javascript #javascripttricks #weakmap #objectkeys #javascriptweird #javascriptquiz
  2. Aubreader Masto @[email protected] ·

    javascript weakmaps should be iterable

    wingolog.org/archives/2024/08/

    #JavaScript #WeakMap

    #weakmap #javascript
  3. Doug Parker 🕸️ @[email protected] ·

    Literal #ShowerThought #idea: A #JavaScript "composite" #WeakMap. Returns a value for a given array of references. All weakly referenced to avoid memory leaks. Something like:

    ```
    const map = new CompositeWeakMap();
    const keys = [ {}, {}, {} ];

    map.set(keys, 'test');
    map.get(keys); // 'test'
    ```

    Not 100% sure it's possible since `WeakMap` is only keyed by a single reference, but I think it's possible if you chain two `WeakMap` objects together. I have an implementation in my head, but I'll have to actually try it to see if it works for real. 🤔

    #showerthought #idea #javascript #weakmap