What is wrong with the code hdb gave you?

That code does not have the problem your code has, so why are you not using it?

As a hint, a string is always true in Perl. And your code simply constructs a string but never matches against it:

...
if ("(".join('|', @{$opts->{params}}).")" # This constructs a string
    and !grep { /^$_/i } keys %$format)   # and this matches $_ agains
+t itself
...

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In reply to Re^4: check parameters by Corion
in thread check parameters by ag4ve

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