filterAt

Keep entries with given keys.

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

function filterAt(x, ks)
// x:  ilists
// ks: keys

const xilists = require('extra-ilists');

var x = [['a', 'b', 'c', 'd', 'e'], [1, 2, 3, 4, 5]];
xilists.filterAt(x, ['a', 'c', 'e']);
// → [ [ 'a', 'c', 'e' ], [ 1, 3, 5 ] ]

xilists.filterAt(x, ['b', 'd']);
// → [ [ 'b', 'd' ], [ 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