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Subhajit Sahu edited this page May 3, 2023 · 23 revisions

Find index of first value passing a test.

Alternatives: search, searchRight, searchAll.
Similar: search, scan, find.

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

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

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

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

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

References