comment on

If you're stuck with using scalars (I'd recommend getting unstuck ASAP and use an actual data structure) then you could do it like this

no strict 'refs';
for($cgi->param) {
  ## &func is bad form, see. perlsub
  complain()
    unless exists  ${__PACKAGE__."::"}{$_}
       and defined *{ ${__PACKAGE__."::"}{$_} }{SCALAR}
       and defined ${ *{ ${__PACKAGE__."::"}{$_} }{SCALAR} };
}
[download]

So for each parameter check if the package variable with the name of the given parameter is defined (check symbol table entry, then type glob entry for SCALAR, then value referenced in type slot) and complain if not. So as you can see, using symbolic variables is a very icky route indeed (as Dominus illustrates very very well).
HTH

_________ broquaint

In reply to Re: Validating the contents of scalars using an array based list by broquaint
in thread Validating the contents of scalars using an array based list by JPaul

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


go ahead... be a heretic
	PerlMonks