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Full Discussion: Script for getting the file merged
Top Forums Shell Programming and Scripting Script for getting the file merged Post 302911474 by Don Cragun on Thursday 31st of July 2014 07:06:15 PM
Old 07-31-2014
RudiC gave you code that meets all of your stated requirements except that you don't like it. In what way does sort fail to meet your needs?

When we see statements like this after a seemingly good solution is proposed, it often means that the submitter is working on a homework assignment and is not allowed to use the tools proposed. Is this a homework assignment?

Are there other requirements that you haven't stated? If there are multiple lines for a given key in the first file, do you really want a copy of every line with that value in the second file duplicated in your new file for each occurrence of that value in the first file?

Is it important that your program run very slowly for medium sized files and run at a snail's pace for large files?

Is it important that your output file maintain the (possibly unsorted) order of lines in the 1st file and for all copies of lines from the 2nd file?

What OS are you using?

The people who read your posts and try to help you find solutions for your problems are volunteers. We are not on your payroll. This problem may be urgent for you, but you can't expect volunteers to ignore other things that they might want to do to satisfy your personal requirements. There are special forums that can be used for "Urgent" requests. In the regular forums requests that need to be responded to urgently are inappropriate. Is this another indication that you have a homework assignment that is due soon and you haven't figured out how to do it yet?
 

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LEARN ABOUT OSX

sdiff

SDIFF(1)							   User Commands							  SDIFF(1)

NAME

       sdiff - side-by-side merge of file differences

SYNOPSIS

       sdiff [OPTION]... FILE1 FILE2

DESCRIPTION

       Side-by-side merge of file differences.

       -o FILE	--output=FILE
	      Operate interactively, sending output to FILE.

       -i  --ignore-case
	      Consider upper- and lower-case to be the same.

       -E  --ignore-tab-expansion
	      Ignore changes due to tab expansion.

       -b  --ignore-space-change
	      Ignore changes in the amount of white space.

       -W  --ignore-all-space
	      Ignore all white space.

       -B  --ignore-blank-lines
	      Ignore changes whose lines are all blank.

       -I RE  --ignore-matching-lines=RE
	      Ignore changes whose lines all match RE.

       --strip-trailing-cr
	      Strip trailing carriage return on input.

       -a  --text
	      Treat all files as text.

       -w NUM  --width=NUM
	      Output at most NUM (default 130) columns per line.

       -l  --left-column
	      Output only the left column of common lines.

       -s  --suppress-common-lines
	      Do not output common lines.

       -t  --expand-tabs
	      Expand tabs to spaces in output.

       -d  --minimal
	      Try hard to find a smaller set of changes.

       -H  --speed-large-files
	      Assume large files and many scattered small changes.

       --diff-program=PROGRAM
	      Use PROGRAM to compare files.

       -v  --version
	      Output version info.

       --help Output this help.

       If a FILE is `-', read standard input.

AUTHOR

       Written by Thomas Lord.

REPORTING BUGS

       Report bugs to <bug-gnu-utils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.

       This  program  comes  with NO WARRANTY, to the extent permitted by law.	You may redistribute copies of this program under the terms of the
       GNU General Public License.  For more information about these matters, see the file named COPYING.

SEE ALSO

       The full documentation for sdiff is maintained as a Texinfo manual.  If the info and sdiff programs are properly installed  at  your  site,
       the command

	      info diff

       should give you access to the complete manual.

diffutils 2.8.1 						    April 2002								  SDIFF(1)
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