filter

Keep values which pass a test.

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

function filter(x, ft)
// x:  an array
// ft: test function (v, i, x)

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

var x = [1, 2, 3, 4, 5];
array.filter(x, v => v % 2 === 1);
// → [ 1, 3, 5 ]

array.filter(x, v => v % 2 === 0);
// → [ 2, 4 ]

References

• Data.List.filter: Haskell
• Array.prototype.filter: MDN web docs
• array_filter: PHP
• _.remove: lodash
• _.without: lodash
• _.compact: lodash
• _.pull: lodash
• _.pullAll: lodash
• _.pullAllBy: lodash
• _.pullAllWith: lodash
• Array.filter: sugarjs
• Array.exclude: sugarjs
• Array.compact: sugarjs
• array-tools.where: @75lb