map$

Updates values based on map function. 🏃 📼 📦 🌔 📒

Alternatives: map, map$.
Similar: map, filter, reduce, accumulate.

array.map$(x, fn, [ths]);
// x:   an array (updated)
// fn:  map function (v, i, x)
// ths: this argument
// --> x

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

var x = [1, 2, 3, 4];
array.map$(x, v => v * 2);
// [ 2, 4, 6, 8 ]

x;
// [ 2, 4, 6, 8 ]

references

• Data.List.map: Haskell
• Array.prototype.map: MDN web docs
• array_map: PHP