map$ - nodef/extra-set GitHub Wiki

Transform values of a set.

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

function map$(x, fm)
// x:  a set (updated)
// fm: map function (v, v, x)

const set = require('extra-set');

var x = new Set([1, 2, 3, 4]);
set.map$(x, v => v * 2);
// → Set(4) { 2, 4, 6, 8 }

x;
// → Set(4) { 2, 4, 6, 8 }

References

• Data.List.map: Haskell
• Array.prototype.map: MDN web docs
• array_map: PHP
• Array.map: sugarjs
• filter-collection: @dimd13