chore(_collection): add docblocks

Author: adhocore

src/UnderscoreCollection.php

@@ -40,6 +40,10 @@ public function map(callable $fn)
 
     /**
      * Alias of map().
+     *
+     * @param callable $fn The callback.
+     *
+     * @return self
      */
     public function collect(callable $fn)
     {
@@ -61,6 +65,11 @@ public function reduce(callable $fn, $memo)
 
     /**
      * Alias of reduce().
+     *
+     * @param callable $fn   The callback.
+     * @param mixed    $memo The initial value carried over to each iteration and returned finally.
+     *
+     * @return mixed
      */
     public function foldl(callable $fn, $memo)
     {
@@ -69,6 +78,11 @@ public function foldl(callable $fn, $memo)
 
     /**
      * Alias of reduce().
+     *
+     * @param callable $fn   The callback.
+     * @param mixed    $memo The initial value carried over to each iteration and returned finally.
+     *
+     * @return mixed
      */
     public function inject(callable $fn, $memo)
     {
@@ -90,6 +104,11 @@ public function reduceRight(callable $fn, $memo)
 
     /**
      * Alias of reduceRight().
+     *
+     * @param callable $fn   The callback.
+     * @param mixed    $memo The initial value carried over to each iteration and returned finally.
+     *
+     * @return mixed
      */
     public function foldr(callable $fn, $memo)
     {
@@ -115,6 +134,11 @@ public function find(callable $fn, $useValue = true)
 
     /**
      * Alias of find().
+     *
+     * @param callable $fn       The truth test callback.
+     * @param bool     $useValue Whether to return value or the index on match.
+     *
+     * @return mixed|null
      */
     public function detect(callable $fn)
     {
@@ -141,6 +165,10 @@ public function filter($fn = null)
 
     /**
      * Alias of filter().
+     *
+     * @param callable|string|null $fn The truth test callback.
+     *
+     * @return self
      */
     public function select(callable $fn = null)
     {
@@ -175,6 +203,10 @@ public function every(callable $fn)
 
     /**
      * Alias of every().
+     *
+     * @param callable $fn The truth test callback.
+     *
+     * @return bool
      */
     public function all(callable $fn)
     {
@@ -195,6 +227,10 @@ public function some(callable $fn)
 
     /**
      * Alias of some().
+     *
+     * @param callable $fn The truth test callback.
+     *
+     * @return bool
      */
     public function any(callable $fn)
     {