Question

我在下面找到了这段代码：

var this.something = {};

var box = {};

box.id = X[0];
box.name = X[1]
box.address = X[2];

if(!this.something.ids[box.id]){                    
  this.something.ids[box.id] = 1;
  this.something.datas.push(box);
}

如何更改“this.something”数据结构中“box.id”=“z”的“box.name”？

任何人都可以帮助我吗？

我需要引用“this.something”并编辑相关的“box”数组。但是，我不知道如何。

感谢。

Answer 1

首先，您不能将属性声明为变量：var this.something = {}是错误的。请改用this.something = {}。

什么是X对象？而不是将this.something作为对象{}，其属性为数组.ids和.datas，您应该使用this.something作为数组[]，然后将其推到那里box对象。然后你可以简单地循环你的数组并只对那些元素进行更改，你正在搜索id。

//Better use array, not object with 2 properties of arrays for ids and objects.
this.something = [];

//Create box object and push to array.
var box = {
   id: X[0],
   name: X[1],
   address: X[2]
}; //You also can create object as you did, but this way is short-hand definition of object with custom properties.

//Push box to array
this.something.push(box)

var boxIdToChange = 'abc';

// Instant edit when you still have access to your 'box' object.
if (box.id === boxIdToChange){
      //Make your changes to 'elem' object here.
      elem.name = 'New name';
      elem.address = 'Different address than original';
}

// If you want to make changes later, for example after creating multiple box elements.
for (var i = 0; i<this.something.length;i++){
   var elem = this.something[i];
   if (elem.id === boxIdToChange){
      //Make your changes to 'elem' object here.
      elem.name = 'New name';
      elem.address = 'Different address than original';
   }
}

Answer 2

简单地做

for(var i = 0; i < this.something.datas.length; i++){
    var box = this.something.datas[i];
    if(box.id === 'z'){
        box.name = "New Name";
    }
}

你可以把它变成一个功能

var Something = function(){
    this.ids = [];
    this.datas = [];

    this.addBox = function(X){
        var box = {};

        box.id = X[0];
        box.name = X[1]
        box.address = X[2];

        if(!this.ids[box.id]){                    
            this.ids[box.id] = 1;
            this.datas.push(box);
        }
    }

    this.getBoxById = function(id){
        for(var i = 0; i < this.datas.length; i++){
            var box = this.datas[i];
            if(box.id === id){
                return box;
            }
        }
        return undefined;
    }
}

var something = new Something();
...
var box = something.getBoxById('z');
if(box){
    box.name = "new name";
}

Answer 3

如果我得到你所说的话，不应该只是：

if (box.id == "z") box.name = "whatever";

是你在寻找什么？

任何人都可以解释这个Javascript数据结构？

3 个答案: