[英]How to convert a String to a Symbol in JavaScript
I need to find a way to convert any string to a symbol. 我需要找到一种将任何字符串转换为符号的方法。 If there was a function that did that, it would be something like this:
如果有一个函数可以做到这一点,那就是这样的:
function toSymbol(variable) = {
//... converts var to symbol
};
//toSymbol("mySymbolString") would return: mySymbolString
Is there any clever way of doing this other than storing potential string to symbol mappings in a dictionary? 除了将潜在的字符串到符号映射存储在字典中之外,还有什么聪明的方法吗?
function toSymbol(variable) {
return Symbol(variable);
};
Keep in mind toSymbol("some_string") === toSymbol("some_string") // false
( by spec. You you need to keep it in true - add memoization ) 请记住
toSymbol("some_string") === toSymbol("some_string") // false
(根据规范。您需要将其保持为toSymbol("some_string") === toSymbol("some_string") // false
添加备注)
I need it to be a variable.
我需要它是一个变量。
All global variables are actually a property of window
所有全局变量实际上都是
window
的属性
eg: 例如:
window.abc = 123
abc == 123
you can also reference properties using strings, eg: 您还可以使用字符串来引用属性,例如:
window["abc"] = 123
window.abc == 123
abc == 123
If you're using namespaces or objects, then it's just the same, eg: 如果您使用名称空间或对象,则它们是相同的,例如:
My.Namespace["variable"]=value
My.Namespace.variable == value
This gives your example "variable": 这给出了您的示例“变量”:
window["variable"] = value
it's not clear what you want to do with this, but you could make it = null
or = {}
to use later. 目前尚不清楚您要如何处理,但可以将其设置为
= null
或= {}
以供以后使用。
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