Backbone/chaplinJS : 如何检查对象中是否存在键

Question

{
                  "providerProperties": [
                    {
                      "key": "hotelnum",
                      "value": "123"
                    },
                    {
                      "key": "contract",
                      "value": "ABC"
                    },
                    {
                      "key": "Sequence",
                      "value": "1213"
                    },
                    {
                      "key": "lastFourDigit",
                      "value": "5454"
                    },
                    {
                      "key": "shop",
                      "value": "abc"
                    },
                    {
                      "key": "bookingEmailAddress",
                      "value": "abc@gmail.COM"
                    },
                    {
                      "key": "numOfRooms",
                      "value": "1"
                    }
}

Backbone/chaplinJS : 如何检查对象中是否存在键。例如要检查密钥 "numOfRooms" 是否可用。

Answer 1

你可以使用下划线方法 findWhere 就像 _.findWhere(yourObject.providerProperties, {key: "numOfRooms"}); 如果结果不是 undefined 那么它存在

Backbone/chaplinJS : 如何检查对象中是否存在键

Backbone/chaplinJS : How to check for key existence in object

backbone.js

chaplinjs