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Full Discussion: finding date numeral from file and check the validity of date format
Top Forums Shell Programming and Scripting finding date numeral from file and check the validity of date format Post 302574318 by manas_ranjan on Thursday 17th of November 2011 05:23:02 AM
Old 11-17-2011
finding date numeral from file and check the validity of date format
hi there

I have file names in different format as below

Code:
triss_20111117_fxcb.csv
triss_fxcb_20111117.csv
xpnl_hypo_reu_miplvdone_11172011.csv
xpnl_hypo_reu_miplvdone_11-17-2011.csv
xpnl_hypo_reu_miplvdone_20111117.csv
xpnl_hypo_reu_miplvdone_20111117xfb.csv
triss_fxcb_20111117.csv.checksum

Now my this little piece of awk will give me only date from that file name

Code:
echo $name | awk -F"_" '{  for(i=1;i<=NF;++i) if($i ~ /[[:digit:]]/) print $i}'

if name is triss_20111117_fxcb.csv then o/p 20111117 which is perfect
if name is xpnl_hypo_reu_miplvdone_11-17-2011.csv then o/p is 11-17-2011.csv which is not perfect as .csv
if name is xpnl_hypo_reu_miplvdone_20111117xfb.csv then o/p is 20111117xfb.csv
if name is triss_fxcb_20111117.csv.checksum then o/p is 20111117.csv.checksum

question is how to remove .csv or any charcter from the o/p as I only need the date from the filename ?

and once I have the date in format like
Code:
YYYYMMDD,DDMMYYYY,MMDDYYYY or YYYY-MM-DD

how can i validate these date format are valid date. date can be in any of above form.
e.g.
11-17-2011
20111117
11172011
 

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MONGOEXPORT(1)							  Mongo Database						    MONGOEXPORT(1)

NAME

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SYNOPSIS

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DESCRIPTION

       mongoexport  is a tool to export a MongoDB collection to either JSON or CSV. The query can be filtered or a list of fields to output can be
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       If the output is CSV, the fields must be specified in order.

EXAMPLES

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OPTIONS

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	      collection to use

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	      comma-separated list of field names

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