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Bugzilla:Languages: Difference between revisions
→Perl Cons
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** That "my ($var) = @_" will get you the first item of the array, but "my $var = @_" will get you a number. | ** That "my ($var) = @_" will get you the first item of the array, but "my $var = @_" will get you a number. | ||
** In a hash created with (), if you accidentally have invalid items, you have an invalid hash. That is, you can't really do %hash = (key1 => $cgi->param('unset_param'), key2 => 'something'), because then you'll actually just have an invalid hash. (key1 will equal "key2" and "something" won't even have a real value.) In general it's safer to always make hashrefs when in doubt. | ** In a hash created with (), if you accidentally have invalid items, you have an invalid hash. That is, you can't really do %hash = (key1 => $cgi->param('unset_param'), key2 => 'something'), because then you'll actually just have an invalid hash. (key1 will equal "key2" and "something" won't even have a real value.) In general it's safer to always make hashrefs when in doubt. | ||
** In array context, $cgi->param('value') returns an ''empty list'' if "value" wasn't passed to the CGI. It doesn't return undef. This is why we have "scalar $cgi->param()" all over the code. | |||
== Perl6 == | == Perl6 == | ||