lepu-test-platform-web/node_modules/es5-ext/array/#/last-index.js

16 lines
412 B
JavaScript

"use strict";
var toPosInt = require("../../number/to-pos-integer")
, value = require("../../object/valid-value")
, objHasOwnProperty = Object.prototype.hasOwnProperty;
module.exports = function () {
var i, length;
if (!(length = toPosInt(value(this).length))) return null;
i = length - 1;
while (!objHasOwnProperty.call(this, i)) {
if (--i === -1) return null;
}
return i;
};