如何在循环中创建动态对象？

Question

基本上，我想在JavaScript中创建一个包含多个对象的大对象。类似于：

var objects = {}
for (x)
objects.x = {name: etc}

有什么想法吗？

- mike

---

这很令人困惑。回答一下：你正在循环什么，你的预期结果是什么？说明你的输入和期望输出。 - Alex Wayne

可能只是我，但我不明白... - Andras Vass

这个问题与我在这里的另一个问题有关：https://dev59.com/XUzSa4cB1Zd3GeqPllfm我尝试将其作为对象数组传递，但它不起作用，所以我正在尝试这种方法。类似于： ManyObjects：{Object1：{name：etc，x：etc}， Object2：{name：etc，x：etc}} - mike

Answer 1

var objects = {};

for (var x = 0; x < 100; x++) {
  objects[x] = {name: etc};
}

- Tomalak

Answer 2

一个实际的实现

使用100个其他对象填充一个容器对象。

<script>
var container = { }; // main object

// add 100 sub-object values
for(i = 0; i < 100; ++i) {
 container['prop'+i ]  /*property name or key of choice*/
         = { 'a':'something', 
             'b':'somethingelse', 
             'c': 2 * i
           }; 
}

测试结果-迭代并显示对象...

for(var p in container) {
 var innerObj = container[p];
 document.write('<div>container.' + p + ':' + innerObj + '</div>');
 // write out properties of inner object
 document.write('<div> .a: ' + innerObj['a'] + '</div>');
 document.write('<div> .b: ' + innerObj['b'] + '</div>');
 document.write('<div> .c: ' + innerObj['c'] + '</div>');
}
</script>

输出结果如下：

container.prop0:[object Object]
.a: something
.b: somethingelse
.c: 0
container.prop1:[object Object]
.a: something
.b: somethingelse
.c: 2
container.prop2:[object Object]
.a: something
.b: somethingelse
.c: 4

etc...

- John K

Answer 3

Using object[propertyname] is the same as using object.propertyname and hence we can dynamically create object keys with object[propertyname] format
for eg:

var fruits = ["Apple", "Orange", "Banana","Grapes"];
var colors = ["red", "Orange", "yellow","blue"];
var newObj = {};
for (var i = 0; i < fruits.length; i++) {
  newObj[fruits[i]] = colors[i];
}
console.log(newObj);

- A5H1Q

Answer 4

试一下这个

var objects = new Array();
var howmany = 10;

for (var i = 0; i < howmany; i++)
{
    objects[i] = new Object();

}

- streetparade

---

你的全局变量i泄漏了。别忘了使用var。 - Eli Grey

不要使用 new Array() 和 **new Object()**，因为它们在性能方面不够高效。相反，请使用字面量。 - Zaheen

Answer 5

//On Nested Obj like that
var playersCount = {
    "Players" : {}
}

var exempleCount = 5;

for(i=0; i <= exempleCount;i++){
    var BadID = Math.floor(Math.random() * 10000);
  
        playersCount.Players["Player_"+i] = {
            "id":BadID, 
            "xPos":0, 
            "yPos":0, 
            "zPos":0
        };
    }
  console.log(playersCount);

- Francesco

Answer 6

可重复使用的动态对象创建方法

const text = ["Cherries", "Strawberry", "Banana"];
const emoji = ["", "", ""];

const createDynamicObj = (keys, values) => {
  if(!keys || !values) return
  let newObj = {};

  for (let i = 0; i < keys.length; i++) {
    newObj[keys[i]] = values[i];
  }
  return newObj
}


console.log(
  createDynamicObj(emoji, text)
)

- GMKHussain