@extra-iterable/scan-until-right.min NPM

Scans from right, until a test passes. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Alternatives: scanWhile, scanWhileRight, scanUntil, scanUntilRight. Similar: search, scan, find.
This is part of package extra-iterable.

This is browserified, minified version of @extra-iterable/scan-until-right. It is exported as global variable iterable_scanUntilRight. CDN: unpkg, jsDelivr.

iterable.scanUntilRight(x, ft);
// x:  an iterable
// ft: test function (v, i, x)
// → first index where test fails till end

const iterable = require("extra-iterable");

var x = [1, 1, 2, 2, 3, 3, 4, 4];
iterable.scanUntilRight(x, v => v % 3 === 0);
// 6                       ^

iterable.scanUntilRight(x, v => v % 2 === 0);
// 8                            ^

iterable.scanUntilRight(x, v => v % 6 === 0);
// 0    ^