searchRight - nodef/extra-array GitHub Wiki

Find index of last value passing a test.

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

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

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

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

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

xarray.searchRight(x, 2, null, v => Math.abs(v));
// → 3             ^

References