带有自定义变量索引的 Javascript 数组
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Javascript array with custom variable indexing
提问by Alan A
Is it possible to set the custom index of an array with a variable.
是否可以使用变量设置数组的自定义索引。
for example:
例如：
var indexID = 5;
var temp = {
indexID: new Array()
};
The above example sets the array index to indexIDand not 5. I have tried using =snd quotes but I without any success.
上面的示例将数组索引设置为indexID和 not 5。我曾尝试使用=snd 引号，但没有任何成功。
Thnaks
纳克斯
回答by VisioN
Yes, just use square brackets notation:
是的，只需使用方括号表示法：
var temp = {};
temp[indexID] = [];
Also pay attention to the fact that tempis an object, and not an array. In JavaScript all associative arrays(or dictionaries) are represented as objects.
还要注意它temp是一个对象，而不是一个数组。在 JavaScript 中，所有关联数组（或字典）都表示为对象。
MORE:http://www.jibbering.com/faq/faq_notes/square_brackets.html#vId
更多：http : //www.jibbering.com/faq/faq_notes/square_brackets.html#vId
回答by Nick Fishman
I think what you want is:
我想你想要的是：
var indexID = 5;
var temp = {};
temp[indexID] = "stuff"
回答by pvorb
With your code, you will create an object.
使用您的代码，您将创建一个对象。
Instead you can do
相反，你可以做
var indexID = 5;
var temp = [];
temp[indexID] = [];
回答by KooiInc
You are mixing Arraywith Object. Arrays know a (numeric) index, Objects consist of key-value pairs, where key may be any string.
您正在Array与Object. 数组知道一个（数字）索引，对象由键值对组成，其中键可以是任何字符串。
Not everyone would agree, bu you could extend Object.prototype
不是每个人都会同意，但你可以延长 Object.prototype
Object.prototype.append = function(key,val){
// confine to Object instances
if (this.constructor !== Object &&
!/object/i.test(this.constructor.prototype)) { return this; }
this[key] = val;
return this;
}
And subsequently use:
随后使用：
var temp = {}.append(indexID,[]};
回答by ALI ALRIKABI
for node-red project i had to add Apostrophe to the index name
对于节点红色项目，我必须在索引名称中添加撇号
var Trend_1={};
Trend_1[**'x'**]=Date_TimeArray;
回答by nihal malik
var index=7; //YOUR CUSTOM INDEX
var newarray=[];
If you need array index to be an array you can do it like this:
如果你需要数组索引是一个数组，你可以这样做：
newarray[index] = {
'KEY':'VAL',
'KEY':'VAL',
'KEY':'VAL'
}
If you need to assign just a value to your custom array index you can do it like this:
如果您只需要为自定义数组索引分配一个值，您可以这样做：
newarray[index] = "ANY-THING-YOU-WANT"
