Check for non blank entry

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

Trying to check data entry to make sure something was entered. If something is entered then continue processing. So I want to use a regular expression that checks if there is NO Blank entries and if so then process: This is not working:

!^\s*$
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Comment on Check for non blank entry Download Code

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Re: Check for non blank entry by Roy Johnson (Monsignor) on Jan 05, 2006 at 18:04 UTC
`/\S/` [download] (capital S) will check for the presence of non-whitespace. Caution: Contents may have been coded under pressure.	[reply] [d/l]
Re: Check for non blank entry by jZed (Prior) on Jan 05, 2006 at 18:29 UTC
If nothing was entered, your $value might be undefined so better to do (defined $value and $value =~ /\S/).	[reply]
Re: Check for non blank entry by smokemachine (Hermit) on Jan 05, 2006 at 18:07 UTC
`!~ /^\s*$/` or `=~ /\S/`	[reply] [d/l] [select]