切换字符串的等效布尔值

I know you can do the following in javascript to toggle a boolean in a one liner.

我知道你可以在javascript中执行以下操作来切换一个线程中的布尔值。

var toggle = false;
if(true) toggle != toggle;

but is this also possible with a string? i know it can be done by some if statements. But is it possible to do it in a oneliner? something like this:

但这也可以用字符串吗？我知道可以通过一些if语句来完成。但是有可能在oneliner中做到吗？像这样的东西：

var string_toggle = "CAT";
if(true) "CAT" = "ESP" || "ESP" = "CAT";

If it is not clear what i am asking let me know so i can improve the question.

如果不清楚我要问什么让我知道所以我可以改善这个问题。

2 个解决方案

#1

You could use the ternary operator.

您可以使用三元运算符。

string_toggle = (string_toggle === "CAT") ? "ESP" : "CAT";

This effectively translates to:

这有效地转化为：

if (string_toggle === "CAT") {
  string_toggle = "ESP";
} else {
  string_toggle = "CAT";
}

#2

If you are a heavy user,why not to make some class?overkill

如果你是一个沉重的用户，为什么不做一些课程？矫枉过正

Here im using this javascript syntax.

我在这里使用这个javascript语法。

You should check ECMAScript 6,you will like it!

你应该检查ECMAScript 6，你会喜欢它！

class ToggleValue {

  constructor(value1,value2){
    
    this.values = [value1,value2]
    this.pointer = 0
  
  }
  
  toggle(){
    
     this.pointer = +!this.pointer
    
  }
  
  valueOf(){
  
    return this.values[this.pointer]
  
  }
  
}



var dupaOrGrabowa = new ToggleValue('dupa', 'grabowa')

dupaOrGrabowa.toggle()
console.log(dupaOrGrabowa + '')
dupaOrGrabowa.toggle()
console.log(dupaOrGrabowa + '')

#1