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Subhajit Sahu edited this page Jun 20, 2020 · 23 revisions

Finds index of first value passing a test. 🏃 📼 📦 🌔 📒

Alternatives: search, searchRight, searchAll.

array.search(x, ft);
// x:  an array
// ft: test function (v, i, x)
// --> index of value, -1 if not found

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

var x = [1, 2, 3, 2, 5];
array.search(x, 2);
// 1        ^

var x = [1, -2, 3, 2, 5];
array.search(x, 2, (a, b) => Math.abs(a) - Math.abs(b));
// 1         ^

var x = [1, -2, 3, 2, 5];
array.search(x, 2, null, v => Math.abs(v));
// 1         ^

references