当下划线完成它的_.each循环时是否有回调因为如果我console log之后立即显然我用每个循环填充的数组不可用.这是一个嵌套_.each循环.
_.each(data.recipe, function(recipeItem) {
var recipeMap = that.get('recipeMap');
recipeMap[recipeItem.id] = { id: recipeItem.id, quantity: recipeItem.quantity };
});
console.log(that.get('recipeMap')); //not ready yet.