angularjs之根據某個屬性值將json分組

angular.forEach(rightOptions.options,function(v,k){
    _label = v.group;
    var subInsertMenus = {};
    if(!rightMenus[_label]){//判斷父節點是否存在
	  subMenu(v);
	  subInsertMenus[v.label] = srm;
	  var rm = {
			  "label": _label,
			  "separator_before":false,
			  "separator_after":false,
			  "submenu":subInsertMenus
	  };
	  rightMenus[_label] = rm;
    }else{
	  subMenu(v);
	  rightMenus[_label].submenu[v.label] = srm;
    }
});