hotline #28822 search_speed

fix array_column compatibility with PHP5.4

library/fonctions/array.php

@@ -16,9 +16,17 @@
  *
  * You should have received a copy of the GNU AFFERO GENERAL PUBLIC LICENSE
  * along with BOKEH; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA 
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
  */
-// helpers sur les arrays
+
+
+// compatibility with PHP < 5.5
+if(!function_exists("array_column")) {
+  function array_column($array, $column_name)   {
+    return array_map(function($element) use($column_name){return $element[$column_name];}, $array);
+  }
+}
+
 
 function array_first(array $array) {
   $values = array_values($array);
@@ -27,7 +35,7 @@ function array_first(array $array) {
 
 
 function array_last(array $array) {
-  if (0 == $count = count($array)) 
+  if (0 == $count = count($array))
     return null;
   $values = array_values($array);
   return $values[$count - 1];