Base

resources/js/binaryIndexOf.js

@@ -0,0 +1,28 @@
+function binaryIndexOf(searchElement) {
+	'use strict';
+
+	var minIndex = 0;
+	var maxIndex = this.length - 1;
+	var currentIndex;
+	var currentElement;
+	var resultIndex;
+
+	while (minIndex <= maxIndex) {
+		resultIndex = currentIndex = (minIndex + maxIndex) / 2 | 0;
+		currentElement = this[currentIndex];
+
+		if (currentElement < searchElement) {
+			minIndex = currentIndex + 1;
+		}
+		else if (currentElement > searchElement) {
+			maxIndex = currentIndex - 1;
+		}
+		else {
+			return currentIndex;
+		}
+	}
+
+	return ~maxIndex;
+}
+
+Array.prototype.binaryIndexOf = binaryIndexOf;