backbone.js - Backbone/chaplinJS：如何检查对象中的键是否存在

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密钥。例如要检查键“numOfRooms”是否可用。

Answer 1

您可以使用下划线方法findWhere，例如_.findWhere(yourObject.providerProperties, {key: "numOfRooms"});如果结果不undefined存在则存在