What is the best way to toggle a boolean variable?
ruby
Solution
You can use XOR operator.
foo ^= true
foo = false
foo ^= true # => true
foo ^= true # => false
Problem
What is the best way to have a variable toggle between `true` and `false`? An obvious way is to initialize a variable `foo`: ``` foo = false ``` and do: ``` foo = foo.! ``` every time when I want to toggle. But this becomes verbose when the variable name is long. Is there a simpler way to do this (by using anything such as syntax sugar, original classes)? Especially, I wonder if there is a way to toggle by just giving it a single method: ``` foo.some_method ```