Minor cleanup

.gitignore

@@ -29,3 +29,4 @@ functional.la
 .libs/
 functional.lo
 /phpunit.xml
+/vendor

src/Functional/InvokeFirst.php

@@ -36,9 +36,7 @@ function invoke_first($collection, $methodName, array $arguments = array())
     Exceptions\InvalidArgumentException::assertCollection($collection, __FUNCTION__, 1);
     Exceptions\InvalidArgumentException::assertMethodName($methodName, __FUNCTION__, 2);
 
-    foreach ($collection as $index => $element) {
-
-        $value = null;
+    foreach ($collection as $element) {
 
         $callback = array($element, $methodName);
         if (is_callable($callback)) {
@@ -47,4 +45,4 @@ function invoke_first($collection, $methodName, array $arguments = array())
     }
 
     return null;
-}
+}

src/Functional/InvokeLast.php

@@ -38,9 +38,7 @@ function invoke_last($collection, $methodName, array $arguments = array())
 
     $lastCallback = null;
 
-    foreach ($collection as $index => $element) {
-
-        $value = null;
+    foreach ($collection as $element) {
 
         $callback = array($element, $methodName);
         if (is_callable($callback)) {
@@ -51,6 +49,6 @@ function invoke_last($collection, $methodName, array $arguments = array())
     if (!$lastCallback) {
     	return null;
     }
-    
+
     return call_user_func_array($lastCallback, $arguments);
-}
+}

src/Functional/Product.php

@@ -22,13 +22,13 @@
  */
 namespace Functional;
 
-use RecursiveIteratorIterator;
-use RecursiveArrayIterator;
+use Traversable;
 
 /**
  * Takes a collection and returns the product of all elements
  *
- * @param \Traversable|array $collection
+ * @param Traversable|array $collection
+ * @param int $initial
  * @return integer|float
  */
 function product($collection, $initial = 1)

src/Functional/Ratio.php

@@ -22,13 +22,13 @@
  */
 namespace Functional;
 
-use RecursiveIteratorIterator;
-use RecursiveArrayIterator;
+use Traversable;
 
 /**
  * Takes a collection and returns the quotient of all elements
  *
- * @param \Traversable|array $collection
+ * @param Traversable|array $collection
+ * @param int $initial
  * @return integer|float
  */
 function ratio($collection, $initial = 1)

src/Functional/Sum.php

@@ -22,13 +22,13 @@
  */
 namespace Functional;
 
-use RecursiveIteratorIterator;
-use RecursiveArrayIterator;
+use Traversable;
 
 /**
  * Takes a collection and returns the sum of the elements
  *
- * @param \Traversable|array $collection
+ * @param Traversable|array $collection
+ * @param int $initial
  * @return integer|float
  */
 function sum($collection, $initial = 0)