JavaScript：在对象声明中声明变量
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JavaScript: Declare variable inside object declaration
提问by Randomblue
Is it possible to declare variables in JavaScript inside an object declaration? I'm looking for something similar to
是否可以在 JavaScript 中的对象声明中声明变量？我正在寻找类似的东西
var myObject = {
myLabel: (var myVariable)
};
instead of having to write
而不是必须写
var myVariable;
var myObject = {
myLabel: myVariable
};
EDIT
编辑
I want this in the context of Node.JS. This is what I have:
我希望在 Node.JS 的上下文中使用它。这就是我所拥有的：
var server = {};
var database = {};
var moar = {};
module.exports = {
server: server,
database: databse,
moar: moar
};
doStuffAsync(function callback() {
// Populate variables
server = stuff();
database = stuff2();
});
回答by palerdot
If you want to scope a variable inside an object you can use IIFE (immediately invoked function expressions)
如果你想在一个对象中定义一个变量，你可以使用 IIFE（立即调用的函数表达式）
var myObject = {
a_variable_proxy : (function(){
var myvariable = 'hello';
return myvariable;
})()
};
回答by Jan Han?i?
You can assign a value to a key directly.
您可以直接为键赋值。
If you now have:
如果你现在有：
var myVariable = 'some value';
var myObject = {
myLabel: myVariable
};
you can replace it with:
您可以将其替换为：
var myObject = {
myLabel: 'some value'
};
