javascript 翻转布尔变量的简写
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Shorthand for flipping a boolean variable
提问by Chiel ten Brinke
How can I flip the value of a boolean variable in javascript, without having to include the variable name twice? So
如何在 javascript 中翻转布尔变量的值，而不必两次包含变量名？所以
foobarthings[foothing][barthing] = !foobarthings[foothing][barthing];
without writing foobarthings[foothing][barthing]twice.
不用写foobarthings[foothing][barthing]两次。
回答by alex
There is no shorter way than what you currently have.
没有比您目前拥有的更短的方法了。
回答by Sjoerd
You can do this:
你可以这样做：
foo ^= 1
But this really switches foo between 0 and 1, not true and false.
但这确实是在 0 和 1 之间切换 foo，而不是真假。
回答by Anujith
var value = true;
alert(value);
value ^= true;
alert(value);?
You could get 1 or 0 here
你可以在这里得到 1 或 0
回答by Jacob Schneider
To flip the value of a boolean variable in JS you need the syntax like this:
要在 JS 中翻转布尔变量的值，您需要这样的语法：
return !foo;
It's really that easy...
真的是那么容易...
Or you can do (foo ^= 1) == true(must be == not ===)
或者你可以做(foo ^= 1) == true（必须是 == 不是 ===）
回答by Arunkumar Srisailapathi
You can have just foo and !foo in the place where you execute it or check the condition.
您可以在执行它或检查条件的地方只有 foo 和 !foo 。
