map$

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Subhajit Sahu edited this page Feb 3, 2021 · 17 revisions

Updates values based on map function. 📦 😺 🏃 📼 🌔 📜 📰 📘

Alternatives: map, map$.
Similar: map, reduce, filter, filterAt, reject, rejectAt.

map.map$(x, fm);
// x:  a map (updated)
// fm: map function (v, k, x)
// → x

const map = require("extra-map");

var x = new Map([["a", 1], ["b", 2], ["c", 3], ["d", 4]]);
map.map$(x, v => v * 2);
// Map(4) { "a" => 2, "b" => 4, "c" => 6, "d" => 8 }

x;
// Map(4) { "a" => 2, "b" => 4, "c" => 6, "d" => 8 }

References