Shorthand for flipping a boolean variable

Question

How can I flip the value of a boolean variable in javascript, without having to include the variable name twice? So

foobarthings[foothing][barthing] = !foobarthings[foothing][barthing];

without writing foobarthings[foothing][barthing] twice.

Solution 1

There is no shorter way than what you currently have.

Solution 2

You can do this:

foo ^= 1

But this really switches foo between 0 and 1, not true and false.

Solution 3

var value = true;
alert(value);
value ^= true;
alert(value);​

You could get 1 or 0 here