Re^3: Boolean counter?

[ikegami]

in reply to Re^2: Boolean counter?
in thread Boolean counter?

Don't modify a variable that you're using elsewhere in an expression. At best, it's unclear. At worse, the result is undefined.

$toggle = - --$toggle;

should be

$toggle = -( $toggle - 1 );

which can be shortened to previously mentioned

$toggle = 1 - $toggle;