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Subhajit Sahu edited this page Dec 28, 2022 · 14 revisions

Finds key of an entry passing a test.

Alternatives: search, searchAll.
Similar: find, search, searchValue.

function search(x, ft)
// x:  lists
// ft: test function (v, k, x)

const xlists = require('extra-lists');

var x = [['a', 'b', 'c', 'd'], [1, 2, 3, 2]];
xlists.search(x, v => v === 2);
// → 'b'                       ^

xlists.search(x, v => v === 4);
// → undefined

References