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Full Discussion: Adding Leading Zeros for date in a file
Top Forums Shell Programming and Scripting Adding Leading Zeros for date in a file Post 302981180 by bakunin on Thursday 8th of September 2016 04:54:26 AM
Old 09-08-2016
Quote:
Originally Posted by Mannu2525
Here Date format should be in mm/dd/yyyy but file has date format in different format - m/dd/yyyy or mm/d/yyyy or m/d/yyyy. If the format is not correct then a leading zero should be added to make it in mm/dd/yyyy like 4/5/2016 to 04/05/2016.
In your sample there seem to be no other data similar to dates, so the following abbreviation may (or may not, depending on how representative your sample is) work:

Replace every instance of a single digit followed by a slash by this sequence with a "0" prepended. This would amount to a simple sed-command:

Code:
sed 's/\([^0-9]\)\([0-9]\/\)/\10\2/g' /path/to/your/file

This will replace in i.e. "|4/5/2016" the "|4/" with "|04/" and then the "/5/" to "/05/".

I hope this helps.

bakunin
 

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LEARN ABOUT OPENDARWIN

getdate

GETDATE(1)                                                         User Commands                                                        GETDATE(1)

NAME

       getdate - AME

SYNOPSIS

       [-dv][-n dec][-f format] [ra dec sys] itype2otype [date and/or time]

DESCRIPTION

       Convert date and time between various formats

              [-dv][-n dec][-f format] itype2otype @file

              itype: nfd=ISOFITS fd=FITS, dt=yyyy.mmdd, hr=hh:mm:ss, deg=dd:mm:ss

              jd=Julian  Date,  mjd=Modified Julian Date hjd=Heliocentric Julian Date, mhjd=Modified HJD ep=epoch, epj=Julian epoch, epb=Besselian
              epoch lt=local time, ut=UT, ts=seconds since 1950-01-01 now=current time, ang=fractional degrees

              otype: fd=FITS, dt=yyyy.mmdd, jd=Julian Date, mjd=Modified Julian Date

              hjd=Heliocentric Julian Date, mhjd=Modified HJD  hr=hh:mm:ss,  deg=dd:mm:ss,  ang=fractional  degrees  ep=epoch,  epj=Julian  epoch,
              epb=Besselian epoch ts=seconds since 1950-01-01, tsu=Unix sec, tsi=IRAF sec gst=Greenwich Sidereal Time, lst=Local Sidereal Time

              @file: First one or two columns are in itype format ra dec sys:  Need for Heliocentric conversions

       -a: Append date to input file, if there is one

       -d: Print date without time

       -e: Print output as ET/TDT/TT converting from UT

       -f: Format for output number (C printf)

       -h hours: Longitude in hours, west positive

       -l degrees: Longitude in degrees, west positive

       -n: Number of decimal places in sec, epoch, JD

       -t: Print time without date

       -v: Verbose

getdate 3.8.4                                                        June 2012                                                          GETDATE(1)
All times are GMT -4. The time now is 03:22 AM.
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