基于For循环迭代的拼接数组

Question

我正在尝试采用一个数组（“ selectedWorkshops”），并将其中的对象移动到“ registeredWorkshops”。 然后，我也想从“ selectedWorkshops”和另一个名为“ workshops”的数组中删除这些对象。

在此处查看我的Codepen： http ：//codepen.io/trueScript/pen/wBVqNN

数组：

var workshops = [
  {
    name: 'apples',
    WorkshopId: '19'
  },
  {
    name: 'oranges',
    WorkshopId: '3b'
  },
  {
    name: 'pears',
    WorkshopId: 'x6'
  },
  {
    name: 'pineapples',
    WorkshopId: '55'
  },
  {
    name: 'watermelons',
    WorkshopId: '8v'
  }
];

var selectedWorkshops = [
  {
    name: 'oranges',
    WorkshopId: '3b'
  },
  {
    name: 'watermelons',
    WorkshopId: '8v'
  },
  {
    name: 'pears',
    WorkshopId: 'x6'
  }
];

var registeredWorkshops = [];

应该将研讨会移至“已注册工作坊”并将其从“ selectedWorkshops”和“ workshops”中删除的功能：

flipWorkshops = function(){
    var numberOfWorkshops = selectedWorkshops.length;
    var X = 1;
    for(var i = 0; i < numberOfWorkshops; i++ ){
        registeredWorkshops.push(selectedWorkshops[i]);
        for(var j = 0, arrayLength = workshops.length; j < arrayLength; j++) {
            var selectedWorkshop = selectedWorkshops[i];
            var originalWorkshop = workshops[j];
            if(selectedWorkshop == originalWorkshop){
                var matchingWorkshop = j;
                workshops = workshops.splice(j, 1);
                selectedWorkshops = selectedWorkshops.splice(i, 1);
            }
        }
    }
};
flipWorkshops();

为什么没有像应有的那样从“车间”和“ selectedWorkshop”阵列中正确剪接对象？ 我究竟做错了什么？

Answer 1

“ splice（）方法在数组中添加/删除项目，并返回删除的项目。” http://w3schools.com/jsref/jsref_splice.asp因此，基本上，您是在将工作坊简化为单个对象，即删除的数组元素。

相反，请更改：

workshops = workshops.splice(j, 1);
selectedWorkshops = selectedWorkshops.splice(i, 1);

...至：

workshops.splice(j, 1);
selectedWorkshops.splice(i, 1);

JSFiddle

---

也许这就是您想要的：

var registeredWorkshops = [];
var flipWorkshops = function(){
    var numberOfWorkshops = selectedWorkshops.length;
    var X = 1;
    for(var i = numberOfWorkshops - 1; i >= 0; i-- ){
        registeredWorkshops.push(selectedWorkshops[i]);
        var selectedWorkshop = selectedWorkshops[i];
        for(var j = workshops.length - 1; j >= 0; j--) {
            var originalWorkshop = workshops[j];
            if(selectedWorkshop.name == originalWorkshop.name &&
              selectedWorkshop.WorkshopId == originalWorkshop.WorkshopId){
                var matchingWorkshop = j;
                workshops.splice(j, 1);
                selectedWorkshops.splice(i, 1);
            }
        }
    }
};
flipWorkshops();

修复了splice ，按照jwatts1980的建议反转了循环，将selectedWorkshop var从循环中移出，并比较了每个对象项，而不是比较对象，因为对象不进行比较 。

JSFiddle进行了调整

JSFiddle对象比较示例