Merge pull request #310 from alleyinteractive/collections-only

Adding only_children() method to collections

src/mantle/support/class-collection.php

@@ -789,6 +789,28 @@ public function only( $keys ) {
 		return new static( Arr::only( $this->items, $keys ) );
 	}
 
+	/**
+	 * Get the items in an collection of arrays with filtered child keys.
+	 *
+	 * @param mixed[]|mixed $keys The keys to filter by.
+	 * @return static
+	 */
+	public function only_children( $keys ) {
+		if ( is_null( $keys ) ) {
+			return new static( $this->items );
+		}
+
+		if ( $keys instanceof Enumerable ) {
+			$keys = $keys->all();
+		}
+
+		$keys = is_array( $keys ) ? $keys : func_get_args();
+
+		return $this->map(
+			fn ( $item ) => Arr::only( $item, $keys ),
+		);
+	}
+
 	/**
 	 * Get and remove the last item from the collection.
 	 *

src/mantle/support/traits/trait-enumerates-values.php

@@ -68,22 +68,22 @@ trait Enumerates_Values {
 		'every',
 		'filter',
 		'first',
-		'flatMap',
-		'groupBy',
-		'keyBy',
+		'flat_map',
+		'group_by',
+		'key_by',
 		'map',
 		'max',
 		'min',
 		'partition',
 		'reject',
-		'skipUntil',
-		'skipWhile',
+		'skip_until',
+		'skip_while',
 		'some',
-		'sortBy',
-		'sortByDesc',
+		'sort_by',
+		'sort_by_desc',
 		'sum',
-		'takeUntil',
-		'takeWhile',
+		'take_until',
+		'take_while',
 		'unique',
 		'until',
 	];