Added missing array extension methods to the client version of crafit…

…y.arrays

crafity.arrays.js

@@ -65,4 +65,87 @@
 		return !arrays.contains.apply(this, arrays.toArray(arguments));
 	};
 
+	/**
+	 * Return an array, containing the common members of both input arrays.
+	 * Example arrays.intersect([1,2,3], [3,4,5]) returns [3]
+	 * @returns {Array} an array
+	 */
+
+	arrays.intersect = function (first, second) {
+		if (arguments.length === 0) {
+			return [].slice();
+		}
+		var a1 = first
+			, a2 = null
+			, a = []
+			, n = 1
+			, l, l2
+			, i, j;
+
+		while (n < arguments.length) {
+			a2 = arguments[n];
+			l = a1.length;
+			l2 = a2.length;
+			for (i = 0; i < l; i++) {
+				for (j = 0; j < l2; j++) {
+					if (a1[i] === a2[j] && a.indexOf(a1[i]) === -1) {
+						a.push(a1[i]);
+					}
+				}
+			}
+			n++;
+		}
+		return a;
+	};
+
+	/**
+	 * Group values in an array.
+	 * @param {Array} array The array to group
+	 * @param {Function} fn (optional) A grouping function
+	 * @return {Object} A object with grouped key/values
+	 *
+	 * @example A Simple group by example: groupBy([1, 2, 3, 2, 4, 4, 3, 5]).
+	 * Result:  { '1': [ 1 ],'2': [ 2, 2 ],'3': [ 3, 3 ],'4': [ 4, 4 ],'5': [ 5 ] }
+	 *
+	 * @example A simple group by and return length example: groupBy([1, 2, 3, 2, 4, 4, 3, 5],
+	 *              function (array) {
+ * 								return array.length;
+ *							}));
+	 * Result: { '1': 1, '2': 2, '3': 2, '4': 2, '5': 1 }
+	 *
+	 * @example A simple group by and sum example: groupBy([1, 2, 3, 2, 4, 4, 3, 5],
+	 *            function (array) {
+ * 							return array.reduce(function (seed, value) { return seed + value }, 0);
+ *						}));
+	 * Result: { '1': 1, '2': 4, '3': 6, '4': 8, '5': 5 }
+	 *
+	 */
+	arrays.groupBy = function (array, fn) {
+		var result = {};
+		array.forEach(function (item) {
+			result[item] = result[item] || [];
+			result[item].push(item);
+		});
+		if (fn) {
+			Object.keys(result).forEach(function (key) {
+				result[key] = fn(result[key]);
+			});
+		}
+		return result;
+	};
+
+	/**
+	 * Get all the unique values in an Array
+	 * @param {Array} array The array to get the unique values from;
+	 * @return {Array} A new array containing all the unique values
+	 */
+	arrays.distinct = function (array) {
+		var result = [];
+		array.forEach(function (value) {
+			if (arrays.contains.not(result, value)) {
+				result.push(value);
+			}
+		});
+		return result;
+	};
 }(window.crafity = window.crafity || {}));