[scrapped]

[Jingcong]

[this one is scrapped. Please visit the new version at:

Map and set getters to give a way to get an item at an order

Map.prototype.at() & Set.prototype.at() Stage: 0 (with a dream) Author: Someone tired of converting Maps to arrays Help wanted: Champion, spec writers, emotional support The Pitch Arrays and strings got .at() in ES2022. Negative indices. Clean syntax. No more arr[arr.length - 1] nonsense. Maps and Sets are ordered too. They deserve the same dignity. The Problem (with evidence) const users = new Map([ [1, 'Alice'], [2, 'Bob'], [3, 'Charlie'] ]); // Current state of affairs (all terri…

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[aclaymore]

Method to access the `nth` inserted element in a map

For example: const map = new Map(); map.set(1, 2); map.set(3, 4); console.log(map.nth(1)); // [3, 4] Preserved insertion order is a handy feature of Maps. It makes them more useful for building caches with eviction policies. For example, you can build an LRU cache by deleting and re-inserting items when they are accessed. While implementing the SIEVE algorithm in JS, I noticed that an .nth() method would be handy. Without it, I need to track insertion order in a seperate array, OR copy the ke…

[Jingcong]

Check the new version/api at Map and set getters to give a way to get an item at an order