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Re: Return?

by Anonymous Monk
on Apr 14, 2000 at 22:49 UTC ( #7649=note: print w/replies, xml ) Need Help??


in reply to Return?

Ok, thanx, I solved that problem!

Now this:
How can I see if the textbox contains ONLY spaces and nothing else?
I don't need code that checks for carriage returns and all, just for spaces.

Replies are listed 'Best First'.
RE: Re: Return?
by btrott (Parson) on Apr 14, 2000 at 22:55 UTC
    You mean just the space character? Not for any whitespace?

    To check if a string contains only space characters, use

    my $string = " "; $string = "Default" if $string =~ /^ *$/;
    This sets $string to "Default" if $string consists of 0 or more space characters, and only space characters; if $string is " a " or something such, the regular expression won't match.

    If you're looking to match strings that consist only of whitespace (no non-whitespace characters), use:

    my $string = " \t \n "; $string = "Default" if $string =~ /^\s*$/;
    \s matches whitespace, so this does the same as the last regex, but matches any whitespace (not just space characters).

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