feat+fix: add where(), fix typo

Author: adhocore

src/Underscore.php

@@ -94,7 +94,7 @@ public function foldr(callable $fn, $memo)
     public function find(callabe $fn)
     {
         foreach ($this->data as $index => $value) {
-            if ($fn($value, $key)) {
+            if ($fn($value, $index)) {
                 return $value;
             }
         }
@@ -190,15 +190,34 @@ public function invoke(callable $fn)
 
     public function pluck($columnKey, $indexKey = null)
     {
-        if (\function_exists('array_column')) {
-            $data = \array_column($this->data, $columnKey, $indexKey);
-        } else {
-            $data = Helper::arrayColumn($this->data, $columnKey, $indexKey);
-        }
+        $data = \array_column($this->data, $columnKey, $indexKey);
 
         return new static($data);
     }
 
+    public function where(array $props)
+    {
+        return $this->filter($this->matcher($props));
+    }
+
+    public function findWhere(array $props)
+    {
+        return $this->find($this->matcher($props));
+    }
+
+    protected function matcher(array $props)
+    {
+        return function ($value, $index) use ($props) {
+            foreach ($props as $prop => $criteria) {
+                if ($value !== $criteria || $prop != $index) {
+                    return false;
+                }
+            }
+
+            return true;
+        };
+    }
+
     /**
      * {@inheritdoc}
      */
@@ -262,6 +281,11 @@ public function __toString()
     {
         return \json_encode($this->data);
     }
+
+    public static function _($data)
+    {
+        return new static($data);
+    }
 }
 
 \class_alias('Ahc\Underscore\Underscore', 'Ahc\Underscore');