javascript 如何增加对象变量内的值
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How to increment a value inside an object variable
提问by Swift
I have the following.
我有以下内容。
var dataset = {val1 : 0, val2 : 0, val3 : 0};
var person = [];
var totalPeople = 10;
for(var i = 0; i <totalPeople; i++) {
person[i] = dataset;
}
Why i chose this approach, click here .
为什么我选择这种方法，请单击此处。
I'm trying to make one of the values auto increment inside another forloop.
我正在尝试使另一个for循环中的值之一自动递增。
I've tried the following approaches to no avail.
我尝试了以下方法无济于事。
person[1]{val1 : 0,
val2 : 0,
val3 : val3 + 1};
person[1]{val1 : 0,
val2 : 0,
val3 : person[1].val3 + 1};
person[1].val3 = person[1].val3 + 1;
any ideas?
有任何想法吗？
采纳答案by Gerald
Totally sorry. The solution that you're referring to herewas posted by me and is incorrect. I just updated my answer in that post.
完全抱歉。你在这里提到的解决方案是我发布的，是不正确的。我刚刚在那篇文章中更新了我的答案。
Don't use the array initialization style that I originally posted:
不要使用我最初发布的数组初始化样式：
var dataset = {val1 : 0, val2 : 0, val3 : 0};
var person = [];
var totalPeople = 10;
for(var i = 0; i < totalPeople; i++) {
person[i] = dataset; // this assigns the *same* object reference to every
// member of the person array.
}
This is the correctway to initialize your person array:
这是初始化 person 数组的正确方法：
var person = [];
var totalPeople = 10;
for(var i = 0; i < totalPeople; i++) {
person[i] = {val1 : 0, val2 : 0, val3 : 0}; // do this to create a *unique* object
// for every person array element
}
If you use the correct array initializtion shown directly above, then you can increment val3 like this with each loop iteration:
如果您使用上面直接显示的正确数组初始化，那么您可以在每次循环迭代中像这样递增 val3：
var person = [];
var totalPeople = 10;
for(var i = 0; i < totalPeople; i++) {
person[i] = {val1 : 0, val2 : 0, val3 : 0};
person[i]['val3'] = i;
}
Sorry again for the bad information that I provided in the other post. (All other info is correct. Just the array initialization code was bad.) I hope this updated information helps.
再次为我在另一篇文章中提供的错误信息感到抱歉。（所有其他信息都是正确的。只是数组初始化代码不好。）我希望这些更新的信息有帮助。
回答by reyaner
This should be the right:
这应该是正确的：
person[1].val3 += 1;
回答by Santiago Nicolas Roca
This should work.
这应该有效。
var dataset = {val1 : 0, val2 : 0, val3 : 0};
var person = [];
var totalPeople = 10;
for(var i = 0; i <totalPeople; i++) {
dataset[i].val3 ++;
}
Could you explain more what you are trying to achieve?
你能解释更多你想要达到的目标吗？
