比较两个对象的角度答案

【问题标题】：Comparing two objects angular比较两个对象的角度
【发布时间】：2019-11-21 19:23:35
【问题描述】：

我有一个这样的对象

workingHours = [{
  endTime: 11:30,
  fixed: true,
  period: 'AM',
  startTime: 10:30,
  weekday: 'MONDAY'
},
{
  endTime: 10:30,
  fixed: true,
  period: 'AM',
  startTime: 08:20,
  weekday: 'FRIDAY'
}
}];

还有一个像这样的对象

workingHoursWeek = [{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'MONDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'TUESDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'WEDNESDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'THURSDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'FRIDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'SATURDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'SUNDAY',
  checked: false
}];

我需要比较这两个对象并更新 workingHoursWeek 以获取 workingHours

的所有值

最后 workingHoursWeek 应该是这样的

workingHoursWeek = [{
  endTime: 11:30,
  fixed: true,
  period: 'AM',
  startTime: 10:30,
  weekday: 'MONDAY',
  checked: true
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'TUESDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'WEDNESDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'THURSDAY',
  checked: false
},
{
   endTime: 10:30,
  fixed: true,
  period: 'AM',
  startTime: 08:20,
  weekday: 'FRIDAY',
  checked: true
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'SATURDAY',
  checked: false
},
{
  endTime: null,
  fixed: false;
  period: 'AM';
  startTime: null;
  weekday: 'SUNDAY',
  checked: false
}];

有没有简单的方法将对象属性重新映射到新对象？谢谢

【问题讨论】：

您想将两个对象合并为一个吗？
好的，谢谢
你想如何比较这两个对象？
我想根据另一个对象上的值更新对象，请看我的例子，你会说现在只有 MONDAY 和 FRIDAY 有值并检查为 true

标签： angular typescript

【解决方案1】：

非常简单，使用 forEach() 循环：

this.workingHoursWeek.forEach(day => {
  this.workingHours.forEach(newDay => {
    if (day.weekday === newDay.weekday) {
      day.endTime = newDay.endTime;
      // etc, update other times and check value to true
    }
  });
});

【讨论】：

【解决方案2】：

尝试使用：

this.workingHours.forEach(newDay => {
this.workingHoursWeek.find(function(element){
        if(element.weekday === newDay.weekday){
           element = newDay;
         }
     })
  })

【讨论】：

【解决方案3】：

this.workingHoursWeek.forEach(day => {
   this.workingHours.forEach(newDay => {
      if (day.weekday === newDay.weekday) {
         day.endTime = newDay.endTime;
         // etc, update other times and check value to true
      }
   });
});

或者你也可以使用Lodash库

Npm 包https://www.npmjs.com/package/lodash 对于前 -

var a = {};
var b = {};

a.prop1 = 2;
a.prop2 = { prop3: 2 };

b.prop1 = 2;
b.prop2 = { prop3: 3 };

_.isEqual(a, b); // returns false if different

【讨论】：