我如何使用非唯一键索引数组。我尝试使用lodashindexBy，但它没有给出预期的结果。varkeys=[{'dir':'left','code':97},{'dir':'left','code':100},{'dir':'right','code':50},{'dir':'right','code':51}];vara=_.indexBy(keys,'dir');结果:{left:{dir:'left',code:100},right:{dir:'right',code:51}}预期结果:{left:[{dir:'left',code:100},{'dir':'left','cod

使用symfony2/doctrine2，我很难为我的查询定义索引。我的代码:$queryBuilder=$this->_em->createQueryBuilder()->select('u,uis,cost,p,stock')->from('AppBundle:FoodAnalytics\UserIngredient','u','p.id')->leftJoin('u.product','p')->leftJoin('u.numberObjects','stock')->leftJoin('u.userIngredientSuppliers','uis')->leftJoin('u

使用symfony2/doctrine2，我很难为我的查询定义索引。我的代码:$queryBuilder=$this->_em->createQueryBuilder()->select('u,uis,cost,p,stock')->from('AppBundle:FoodAnalytics\UserIngredient','u','p.id')->leftJoin('u.product','p')->leftJoin('u.numberObjects','stock')->leftJoin('u.userIngredientSuppliers','uis')->leftJoin('u