map$
Subhajit Sahu edited this page Dec 5, 2022
·
17 revisions
Transform values of a map.
Alternatives: map, map$.
Similar: map, reduce, filter, filterAt, reject, rejectAt.
function map$(x, fm)
// x: a map (updated)
// fm: map function (v, k, 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 }