Case sensitive

DaWolf has asked for the wisdom of the Perl Monks concerning the following question:

Hello there.

This is, I think, a very basic question, but since I'm a newbie this sort of thing doesn't bother me...

I need a script to ignore the case used by a user in a form field. How can I do that? I only have a wild guess here: I'll need to use tr right?

So, let's assume that I've called that user entry $foo in my script (pretty original huh?)

How do I make $foo case insensitive to the script, so if the user types "Test" or "TeSt" or "test" or "TEST" doesn't make a difference to the script?

Tx in advance,

Er Galvão Abbott
a.k.a. Lobo, DaWolf
Webdeveloper

Comment on Case sensitive Download Code

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Re: Case sensitive by Fastolfe (Vicar) on Nov 08, 2000 at 21:29 UTC
I'm assuming you're talking about CGI here, and that you're talking about the value of a form element. In this case, something like lc might be what you need: `use CGI; my $value = param('field'); # "mY vALuEs RuLE" $value = lc(param('field')); # "my values rule" $value = uc(param('field')); # "MY VALUES RULE"` [download]	[reply] [d/l]
Re: Case sensitive by kilinrax (Deacon) on Nov 08, 2000 at 21:32 UTC
Yeah, `tr` would work as a way of converting something to lower case: `$foo =~ tr/A-Z/a-z/;` [download] And in the spirit of TMTOWTDI: `$foo = "\Lfoo";` [download] However, this is probably the most sensible way: `$foo = lc $foo;` [download] Lastly, you could use a case-insensitive regex instead. For example, if `$test` is the string you are matching it with: `if ($foo =~ /^$test$/i) { ... }` [download]	[reply] [d/l] [select]
Re: Case sensitive by stephen (Priest) on Nov 08, 2000 at 21:34 UTC
DaWolf-- Here're a couple of answers. Easiest: you can convert $foo to lowercase, like so: `if ( lc($foo) eq "test" ) { print "It was test!\n"; }` [download] Or use a regular expression with 'i' on the end to indicate case-insensitivity: `if ( $foo =~ /^test$/i) { print "It was test!\n"; }` [download] stephen	[reply] [d/l] [select]
Re: Case sensitive by DaWolf (Curate) on Nov 09, 2000 at 02:13 UTC
Thanks, fellas. That was exactly what I was looking for. Best regards, Er Galvão Abbott a.k.a. Lobo, DaWolf Webdeveloper	[reply]