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Subhajit Sahu edited this page Dec 8, 2022
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14 revisions
Find key of an entry passing a test.
Similar: search, searchAll.
Similar: find, search, searchValue.
function search(x, ft)
// x: an object
// ft: test function (v, k, x)
const object = require('extra-object');
var x = {a: 1, b: 2, c: 3, d: 2};
object.search(x, v => v === 2);
// → 'b' ^
object.search(x, v => v === 4);
// → null