Compare Two Files(Column By Column) In Perl or shell Post: 302545664

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Top Forums Shell Programming and Scripting Compare Two Files(Column By Column) In Perl or shell Post 302545664 by kumar96877 on Tuesday 9th of August 2011 05:46:43 AM

08-09-2011

Registered User

Compare Two Files(Column By Column) In Perl or shell

Hi,
I am writing a comparator script, which comapre two txt files(column by column)
below are the precondition of this comparator
1)columns of file are not seperated
Ex.
file1.txt
8888812341181892
1243548895685687
8945896789897789
1111111111111111
file2.txt
9578956789567897
8945789789567894
5789567895678967
1111111111111111

where charactr 1-5 if field1
character 6-9 is field2 etc.

second file is also same structure. but the filed1 of file1 may differ from field1 of file2.

2) Field_Desc.csv
the position of fields is taken from third file (just call it Field_desc.csv)
from this file => we can take a field position and its length
Ex.
FIELD1|OFFSET|LENGTH
My question:
1) i am reading all files, but how to cut a specific column of a file(not line by line). I need entire column in a seperate variable.
Ex.

field1 of file1
88888
12435
89458
11111

field1 of file2
95789
89457
57895
11111
=> I am not getting above result.

2) now I will perform the diff command or check line1 of file1 is equal to line1 of file2. need result as below

Ex.
field1_of_file1 field1_of_file2 Result
88888 95789 "Error not equal value"
12435 89457 "Error not equal value"
89458 57895 "Error not equal value"
11111 11111 "Files has same value"

3) Script is executed as below
perl Script_compare.pl File1.txt File2.txt Filed_Desc.csv
and result must be writeen in another file "Result.log"

please help me. I was in second position "not able to cut the file in column basis.
thanks
vikash

kumar96877

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LEARN ABOUT LINUX

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD

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