Comparing Select Columns from two CSV files in UNIX and create a third file based on comparision
Hi , I want to compare first 3 columns of File A and File B and create a new file File C which will have all rows from File B and will include rows that are present in File A and not in File B based on First 3 column comparison.
Hi there,
I have an csv file.
I want to compare the 16th and 18th columns. They contain alpha numeric characters. Some are same and some are different. We have to pick the ones which are different. But with certain rules.
16th col. 18th col.
---------- ... (1 Reply)
Hi All,
I have two .csv's
input.csv having values as (7 columns)
ABC,A19907103,ABC DEV YUNG,2.17,1000,2157,07/07/2006
XYZ,H00213850,MM TRUP HILL,38.38,580,23308,31/08/2010
output.csv having (25 columns)
A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y... (4 Replies)
cat sample.csv
ID,Name,no
1,AAA,1
2,BBB,1
3,AAA,1
4,BBB,1
cut -d',' -f2 sample.csv | sort | uniq
this gives only the 2nd column values
Name
AAA
BBB
How to I get all the columns of CSV along with this? (1 Reply)
Hi,
I have a file of csv data, which looks like this:
file1:
1AA,LGV_PONCEY_LES_ATHEE,1,\N,1,00020460E1,0,\N,\N,\N,\N,2,00.22335321,0.00466628
2BB,LES_POUGES_ASF,\N,200,200,00006298G1,0,\N,\N,\N,\N,1,00.30887539,0.00050312... (10 Replies)
Hi, I am newbie in shell script.
I need your help to solve my problem.
Firstly, I have 2 files of csv and i want to compare of the contents then the output will be written in a new csv file.
File1:
SourceFile,DateTimeOriginal
/home/intannf/foto/IMG_0713.JPG,2015:02:17 11:14:07... (8 Replies)
Hello all, First post here. I did not notice a previous post to help me down the right path. I am looking to compare a column in a CSV file against another file (which is not a column match one for one) but more or less when a match is made, I would like to append a third column that contains a... (17 Replies)
Dear UNIX experts,
I'm a command line novice working on a Macintosh computer (Bash shell) and have neither found advice that is pertinent to my problem on the internet nor in this forum.
I have hundreds of .csv files in a directory. Now I would like to copy the subset of files that contains... (8 Replies)
I am joining two CSV files based on 'Server_Name' column, 1st column of first file and 2nd column of second file.
If matches, output 1st and 2nd column from first file, 3rd,4th,5th,6th columns from second file.
I am expecting output CSV file as below.
Could you please send me help me with... (6 Replies)
Discussion started by: Anadmbt
6 Replies
LEARN ABOUT DEBIAN
path::class::file::stat
Path::Class::File::Stat(3pm) User Contributed Perl Documentation Path::Class::File::Stat(3pm)NAME
Path::Class::File::Stat - cache and compare stat() calls on a Path::Class::File object
SYNOPSIS
use Path::Class::File::Stat;
my $file = Path::Class::File::Stat->new('path','to','file');
# $file has all the magic of Path::Class::File
# sometime later
if ($file->changed)
{
# do something provocative
}
DESCRIPTION
Path::Class::File::Stat is a simple extension of Path::Class::File. Path::Class::File::Stat is useful in long-running programs (as under
mod_perl) where you might have a file handle opened and want to check if the underlying file has changed.
METHODS
Path::Class::File::Stat extends Path::Class::File objects in the following ways.
use_md5
Calling this method will attempt to load Digest::MD5 and use that instead of stat() for creating file signatures. This is similar to how
File::Modified works.
changed
Returns the previously cached File::stat object if the file's device number and inode number have changed, or if the modification time or
size has changed.
Returns 0 (false) otherwise.
While File::Modified uses a MD5 signature of the stat() of a file to determine if the file has changed, changed() uses a simpler (and
probably more naive) algorithm. If you need a more sophisticated way of determining if a file has changed, use the restat() method and
compare the cached File::stat object it returns with the current File::stat object.
Example of your own changed() logic:
my $oldstat = $file->restat;
my $newstat = $file->stat;
# compare $oldstat and $newstat any way you like
Or just use File::Modified instead.
restat
Re-cache the File::stat object in the Path::Class::File::Stat object. Returns the previously cached File::stat object.
The changed() method calls this method internally if changed() is going to return true.
SEE ALSO
Path::Class, Path::Class::File, File::Signature, File::Modified
AUTHOR
Peter Karman, <karman@cpan.org>
COPYRIGHT AND LICENSE
Copyright (C) 2006 by Peter Karman
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.14.2 2012-01-28 Path::Class::File::Stat(3pm)