| "use strict"; |
| |
| var toPosInt = require("../../number/to-pos-integer") |
| , callable = require("../../object/valid-callable") |
| , value = require("../../object/valid-value") |
| , floor = Math.floor; |
| |
| module.exports = function (compareFn) { |
| var length, low, high, middle; |
| |
| value(this); |
| callable(compareFn); |
| |
| length = toPosInt(this.length); |
| low = 0; |
| high = length - 1; |
| |
| while (low <= high) { |
| middle = floor((low + high) / 2); |
| if (compareFn(this[middle]) < 0) high = middle - 1; |
| else low = middle + 1; |
| } |
| |
| if (high < 0) return 0; |
| if (high >= length) return length - 1; |
| return high; |
| }; |
