Implemented Collection::contains()

Cake/Test/TestCase/Utility/CollectionTest.php

@@ -188,4 +188,18 @@ public function testSomeReturnFalse() {
 		$this->assertFalse($collection->some($callable));
 	}
 
+/**
+ * Tests contains
+ *
+ * @return void
+ */
+	public function testContains() {
+		$items = ['a' => 1, 'b' => 2, 'c' => 3];
+		$collection = new Collection($items);
+		$this->assertTrue($collection->contains(2));
+		$this->assertTrue($collection->contains(1));
+		$this->assertFalse($collection->contains(10));
+		$this->assertFalse($collection->contains('2'));
+	}
+
 }

Cake/Utility/Collection.php

@@ -175,7 +175,20 @@ public function some(callable $c) {
 		return false;
 	}
 
-	public function contains(callable $c) {
+/**
+ * Returns true if $value is present in this collection. Comparisons are made
+ * both by value and type.
+ *
+ * @param mixed $value the value to check for
+ * @return boolean true if $value is present in this collection
+ */
+	public function contains($value) {
+		foreach ($this as $v) {
+			if ($value === $v) {
+				return true;
+			}
+		}
+		return false;
 	}
 
 	public function mapReduce(callable $map, callable $reduce) {