Merge pull request #135 from funkjedi/array-first-last-dot-notation

Add support for array first/last dot notation

Author: sanmai

src/Liquid/Context.php

@@ -330,6 +330,16 @@ private function variable($key)
 			}
 
 			if (is_array($object)) {
+				// if the last part of the context variable is .first we return the first array element
+				if ($nextPartName == 'first' && count($parts) == 0 && !array_key_exists('first', $object)) {
+					return StandardFilters::first($object);
+				}
+
+				// if the last part of the context variable is .last we return the last array element
+				if ($nextPartName == 'last' && count($parts) == 0 && !array_key_exists('last', $object)) {
+					return StandardFilters::last($object);
+				}
+
 				// if the last part of the context variable is .size we just return the count
 				if ($nextPartName == 'size' && count($parts) == 0 && !array_key_exists('size', $object)) {
 					return count($object);

tests/Liquid/ContextTest.php

@@ -319,6 +319,30 @@ public function testOverrideSize()
 		$this->assertEquals(5000, $this->context->get('hash.size'));
 	}
 
+	public function testArrayFirst()
+	{
+		$this->context->set('array', array(11, 'jack', 43, 74, 5, 'tom'));
+		$this->assertEquals(11, $this->context->get('array.first'));
+	}
+
+	public function testOverrideFirst()
+	{
+		$this->context->set('array', array(11, 'jack', 43, 'first' => 74, 5, 'tom'));
+		$this->assertEquals(74, $this->context->get('array.first'));
+	}
+
+	public function testArrayLast()
+	{
+		$this->context->set('array', array(11, 'jack', 43, 74, 5, 'tom'));
+		$this->assertEquals('tom', $this->context->get('array.last'));
+	}
+
+	public function testOverrideLast()
+	{
+		$this->context->set('array', array(11, 'jack', 43, 'last' => 74, 5, 'tom'));
+		$this->assertEquals(74, $this->context->get('array.last'));
+	}
+
 	public function testDeepValueNotObject()
 	{
 		$this->context->set('example', array('foo' => new ToLiquidNotObject()));