Switch with intervals

[Anon]

How can I make the switch/case construct react to intervals rather than simple types?

I need four reactions:
case <0 :
case 0 :
case 1 :
case >0 :
(I know the syntaxt is wrong here, but you get the idea)

I want to keep the switch argument intact. Can't the cases express intervals?

I know I can convert my numbers to simple types to do the switch, but just out of curiosity...

Martin

[Anon]

Try this,

switch ($arg) {
case 1 : ...
case 0 : ...
default :
$new_arg = $arg $arg $arg;
$new_arg = $new_arg/(abs($arg)abs($arg)abs($arg));
switch ($new_arg) {
case -1 : ... <0
case 1 : ... >0
}
}

The switch operator does not let you execute logical expressions, like $arg>0).
Function abs() turns negative number into the positive. Its the main idea.

Bye.