使用 lodash/underscore 如何更新键的值答案

【问题标题】：Using lodash/underscore how can I update the value of the key使用 lodash/underscore 如何更新键的值
【发布时间】：2015-07-21 19:51:21
【问题描述】：

我必须使用 Date.parse() 将日期转换为时间戳。每次我找到键“Date__c”时。

[
   {
      "Date__c":"07/30/2015",
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   },
   {
      "Date__c":"07/30/2015",
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   },
   {
      "Date__c":"07/30/2015",
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   }
]

To become


[
   {
      "Date__c":1438185600000,
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   },
   {
      "Date__c":1438185600000,
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   },
   {
      "Date__c":1438185600000,
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   }
]

【问题讨论】：

标签： object lodash

【解决方案1】：

arr = [
   {
      "Date__c":"07/30/2015",
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   },
   {
      "Date__c":"07/30/2015",
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   },
   {
      "Date__c":"07/30/2015",
      "End_Time__c":"14:00",
      "Start_Time__c":"07:00"
   }
]

_.map(arr, 
    function (a) { 
        return _.mapValues(a, function(v, k) { 
                return "Date__c" == k ? new Date(v).valueOf() : v; 
            }
        )
    }
)

【讨论】：