为什么在闭包内设置的值在闭包外不能使用？
var orderList = doc.orderList;
var orderShopList = new Array();
orderList.forEach(function(oneOrder){
Shop.findOne({'name': oneOrder.shopName},function(err,shop){
orderShopList[orderShopList.length] = shop;
console.log(orderShopList);//有数值
})
})
console.log(orderShopList);//打印为null
求教这是为什么，orderList是一个对象数组，orderShopList最终不是应该有数值吗？
5 回复
var orderList = doc.orderList; var orderShopList = new Array(); var outputFunction= function(){ console.log(orderShopList); } orderList.forEach(function(oneOrder){ Shop.findOne({‘name’: oneOrder.shopName},function(err,shop){ orderShopList[orderShopList.length] = shop; outputFunction(); }) })
