ECMAScript 6: maps and sets

Check out my book (free online): “Exploring ES6”. Updated version of this blog post: chapter “Maps and Sets”. Among others, the following four data structures are new in ECMAScript 6: Map, WeakMap, Set and WeakSet. This blog post explains how they work. Map # JavaScript has always had a very spartan standard library. Sorely missing was a data structure for mapping values to values. The best you c

[efcl]

Map, WeakMap, Set, WeakSetの挙動についての解説。 それぞれのAPIの解説、WeakMapを使ったプライベートデータ, spread operatorとあわせた使い方等について

[t32k]

#es6 Among others, the following four data structures are new in ECMAScript 6: Map, WeakMap, Set and WeakSet. This blog post explains how they work.