If you want anything that isn't a digit or a leter (or an underscore), then you might consider using: \W
while ($in =~ /\W/) {
# do something
}
Or:
while ($in !~ /\w/) { ... }
Otherwise:
while ($in =~ /[^a-zA-Z0-9]/) {
# do something
}
Or:
while ($in !~ /[a-zA-Z0-9]/) { ... }
There's not much to chose between =~ and !~, but I generally like the emphasis of saying "as long as it's not one of these things..."
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
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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).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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