search - nodef/extra-iterable GitHub Wiki

Find index of first value passing a test.

Alternatives: search, searchRight, searchAll. Similar: search, searchValue, searchInfix, searchSubsequence. Similar: search, [scan], find.

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

const xiterable = require('extra-iterable');

var x = [1, 2, 3, 4, 5];
xiterable.search(x, v => v % 2 == 0);
// → 1      ^

xiterable.search(x, v => v % 2 == 1);
// → 0   ^

References