我有一个JSON数组对象如下:
var orders = [{
orderId: 1,
firstName: 'John',
lastName: 'Smith',
address: {
street: '123 Main Street',
city: 'New York',
zip: 10001
}
}, {
orderId: 2,
firstName: 'John',
lastName: 'Smith',
address: {
street: '456 Main Street',
city: 'New York',
zip: 10001
}
}, {
orderId: 3,
firstName: 'John',
lastName: 'Smith',
address: {
street: '123 Main Street',
city: 'New York',
zip: 10001
}
}, {
orderId: 4,
firstName: 'John',
lastName: 'Smith',
address: {
street: '123 Main Street',
city: 'New York',
zip: 10002
}
}];
我正在尝试使用underscore.js
创建一个新的数组对象,按地址分组,以满足显示已发送到123 Main Street, New York, 1001
的所有订单的用例。
underscore.js
是否有正确的方法来做到这一点?如果是这样,我该怎么办?任何提示都会有所帮助。
答案 0 :(得分:3)
请参阅_.groupBy
console.log(_.groupBy(orders, function(obj){
return obj.address.street + '|' + obj.address.city + '|' + obj.address.zip;
}));
请参阅http://jsfiddle.net/mendesjuan/gc47ruyL/1/
此示例假设您在地址中没有|
,您可能需要更好的分隔符,或使用JSON.stringify
:
console.log(_.groupBy(orders, function(obj){
return JSON.stringify([obj.address.street, obj.address.city, obj.address.zip]);
}));
答案 1 :(得分:2)
如果您的网页中已经有下划线,则可以使用
var filteredOrders = _.filter(orders, function(order){
return (order.address.street === '123 Main Street') &&
(order.address.city === 'New York') &&
(order.address.zip === 10001);
});