Well, in response to
sub validate_integer      { 1 } # how do you do this?

...you could do...
sub validate_integer {$_[0] == int($_[0])}

I assume, of course, that by "validate integer" you meant to check if the number was an integer.

Quinn Slack
perl -e 's ssfhjok qupyrqs&&tr sfjkohpyuqrspitnrapj"hs&&eval&&s&&&'

In reply to Re: An example of programming by contract by qslack
in thread An example of programming by contract by princepawn

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