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Top Forums UNIX for Dummies Questions & Answers list all files containing 4 digit number using grep Post 302444083 by hobiwhenuknowme on Wednesday 11th of August 2010 12:39:56 AM
Old 08-11-2010
Raj,
thanks for the effort buddy.
unfortunately there is no output on the screen despite the fact that some files do have
4 digit numbers.
doesn't work.

---------- Post updated at 11:39 PM ---------- Previous update was at 11:36 PM ----------

guruprasad,
when i am in my home directory after i do cd ~, i have files in my home directory that contain numbers that are 4 digits long.
all i am trying to do i list the files that have 4 digit long numbers, what line they are on within the file and what are the numbers themselves, all this without outputting out the entire line.

---------- Post updated at 11:39 PM ---------- Previous update was at 11:39 PM ----------

i am a beginner user, using putty.
 

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CheckDigits::MXX_002(3pm)				User Contributed Perl Documentation				 CheckDigits::MXX_002(3pm)

NAME
CheckDigits::MXX_002 - compute check digits for CAS SYNOPSIS
use Algorithm::CheckDigits; $cas = CheckDigits('cas'); if ($cas->is_valid('1333-74-0')) { # do something } $cn = $cas->complete('1333-74-'); # $cn = '1333-74-0' $cd = $cas->checkdigit('1333-74-0'); # $cd = '0' $bn = $cas->basenumber('1333-74-0'); # $bn = '1333-74-' DESCRIPTION
ALGORITHM 1. Beginning right with the second digit all digits are weighted ascending starting with 1. 2. The sum of those products is computed. 3. The checksum is the last digit of the sum from step 2 (modulo 10). METHODS is_valid($number) Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above. Returns false otherwise, complete($number) The check digit for $number is computed and concatenated to the end of $number. Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces. basenumber($number) Returns the basenumber of $number if $number has a valid check digit. Return '' otherwise. checkdigit($number) Returns the checkdigit of $number if $number has a valid check digit. Return '' otherwise. EXPORT None by default. AUTHOR
Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de> THANKS
Aaron W. West pointed me to a fault in the computing of the check digit. HERMIER Christophe made me aware that CAS is now assigning 10-digit CAS Registry Numbers (http://www.cas.org/newsevents/10digitrn.html) SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de, www.cas.org http://www.cas.org/expertise/cascontent/registry/checkdig.html perl v5.10.0 2008-05-17 CheckDigits::MXX_002(3pm)
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