map$

Transform values of an array.

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

function map$(x, fm)
// x:  an array (updated)
// fm: map function (v, i, 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