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Full Discussion: Date & NUmber Validation Query
Top Forums Shell Programming and Scripting Date & NUmber Validation Query Post 59969 by zazzybob on Wednesday 5th of January 2005 06:06:58 PM
Old 01-05-2005
Don't worry about damaging /dev/null - unless you're logged in as root and issue rm /dev/null nothing bad will happen!

The > redirection operator will erase anything in a file before outputting to it - use >> if you want to append.

If you want to change the format to delimit the date components with "-" just change the command to

echo "12-31-2004" | grep '^[0-1][0-9]-[0-3][0-9]-[0-9]\{4\}$' > myfile # or wherever

If you had the date in a variable, say DATE, then you can check the format of DATE with

Code:
echo "$DATE" | grep '^[0-1][0-9]-[0-3][0-9]-[0-9]\{4\}$' > /dev/null 2>&1
if [ "$?" -eq "0" ]; then
   echo "Date correctly formatted"
else
   echo "Date incorrectly formatted"
fi

If you have a something along the lines of
Code:
DATE="12/31/2004"

and you want to change the format, try
Code:
echo "$DATE" | grep '^[0-1][0-9]/[0-3][0-9]/[0-9]\{4\}$' > /dev/null 2>&1
if [ "$?" -eq "0" ]; then
   echo "Date correctly formatted"
   echo "$DATE" | tr '/' '-'
else
   echo "Date incorrectly formatted"
fi

And the "/" will be substituted for "-"

If this isn't what you want please post exact requirements.

Cheers
ZB
 

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LEARN ABOUT DEBIAN

apertium-validate-modes

apertium-validate-modes(1)												apertium-validate-modes(1)

NAME

       apertium-validate-modes - This application is part of ( apertium )

       This tool is part of the apertium open-source machine translation toolbox: http://www.apertium.org.

SYNOPSIS

       apertium-validate-modes <input_file>

DESCRIPTION

       This is an intermediate tool from Apertium level 2 engine. You should never have to use it independently.

       It is a script that validates a modes.xml file against the apertium structural modes DTD using the xmllint utility.

OPTIONS

       It has no options.

FILES

       input_file A modes.xml file

       modes.dtd The DTD used to validate the input file.

SEE ALSO

       apertium-gen-modes(1), apertium-gen-oldbil(1), apertium-interchunk(1), apertium-validate-postchunk(1), apertium-validate-interchunk(1).

BUGS

       Lots of them...lurking in the dark and waiting for you!

AUTHOR

       Copyright  (c)  2005-2007 Universitat d'Alacant / Universidad de Alicante.  This is free software.  You may redistribute copies of it under
       the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.

								    2006-03-11						apertium-validate-modes(1)
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