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Shell Programming and Scripting
Looping through 2 files simultaneously
Post 302378973 by chris01010 on Wednesday 9th of December 2009 08:41:07 AM
12-09-2009
Looping through 2 files simultaneously
Hi all,
I'm having a problem with a script which should ultimately provide a filename by reading a value from file1 and file2 then join together.
I'm planning to use a loop/ loops to get the values out of both files and create a single string unfortunately the code currently treats the second loop (which is how I have written it to be fair) as nested instead of working simultaneously. The thing is that my sanity is slowly slipping away so I have stripped the code back to try and get a clearer picture.
The file's contain:
num.txt
65
65
66
67
first.txt
MRO0122
MRO0112
MRO0112
MRO0113
Currently the code returns:
MRO011365
MRO011365
MRO011366
MRO011367
What I want is
MRO012265
MRO011265
MRO011266
MRO011367
Anyway here's the code:
for update in `cat num.txt`
do
echo $update
for filename1 in `cat first.txt`
do
echo $filename1
truefile=$filename1$update.TXT
done
echo $truefile
doneLet me know if this is post is confusing in it's description and i'll try to provide clearer detail.
Any help will be thoroughly appreciated
I'm off to shoot myself.
Thanks
Chris
I'm having a problem with a script which should ultimately provide a filename by reading a value from file1 and file2 then join together.
I'm planning to use a loop/ loops to get the values out of both files and create a single string unfortunately the code currently treats the second loop (which is how I have written it to be fair) as nested instead of working simultaneously. The thing is that my sanity is slowly slipping away so I have stripped the code back to try and get a clearer picture.
The file's contain:
num.txt
65
65
66
67
first.txt
MRO0122
MRO0112
MRO0112
MRO0113
Currently the code returns:
MRO011365
MRO011365
MRO011366
MRO011367
What I want is
MRO012265
MRO011265
MRO011266
MRO011367
Anyway here's the code:
for update in `cat num.txt`
do
echo $update
for filename1 in `cat first.txt`
do
echo $filename1
truefile=$filename1$update.TXT
done
echo $truefile
doneLet me know if this is post is confusing in it's description and i'll try to provide clearer detail.
Any help will be thoroughly appreciated
I'm off to shoot myself.
Thanks
Chris
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LEARN ABOUT DEBIAN
rdup-up
RDUP-UP(1) rdup RDUP-UP(1) NAME
rdup-up - update a directory tree with a rdup archive SYNOPSIS
rdup-up [OPTION]... DIRECTORY DESCRIPTION
With rdup-up you can update an (possibly) existing directory structure with a rdup archive. The rdup archive has to be given to rdup-up's standard input. Username and uids rdup outputs both the username and uid, the receiving system (which may be a totally different system) checks if the username and uid match. If the username and uid don't match the (numeric) uid is used on the file. The same holds true for the groupname and gid. OPTIONS
-n Do a dry-run and do not create anything on disk. -t Create DIRECTORY (ala mkdir -p) if it does not exist. -s N Strip N path components from a pathname. If the resulting pathname is empty after this operation it is skipped. Be careful however with the following structure: /foo /foo/bar /foo/bar/bla.txt /foo/blork/bla.txt With rdup-up -s2 this will leave: <empty> <empty> /bla.txt /bla.txt And the last 'bla.txt' will overwrite the previous one, this will happen without warnings. -r PATH This option is related to the -s option, but works different. The string PATH is removed from (the beginning of) each pathname. With -r /home/backup the pathname /home/backup/bin/mycmd becomes /bin/mycmd. The same could be done with -s 2, but then you need to count the slashes. Note -s is always performed before -r. -v Be more verbose and echo the processed files to standard output. -vv Be even more verbose and echo processed file and the uid and gid information to standard output. -T Show a table of contents of the rdup stream received (ala tar -tf -). With -T the directory argument is optional. -T unsets any verbose (-v) options. -h A short help message. -V Show the version. EXIT CODE
rdup-up return a zero exit code on success, otherwise 1 is returned. AUTHOR
Written by Miek Gieben. REPORTING BUGS
Report bugs to <miek@miek.nl>. SEE ALSO
http:/www.miek.nl/projects/rdup/ is the main site of rdup. Also see rdup(1), rdup-tr(1) and rdup-backups(7). COPYRIGHT
Copyright (C) 2005-2010 Miek Gieben. This is free software. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Licensed under the GPL version 3. See the file LICENSE in the source distribution of rdup. 1.1.11 13 Dec 2008 RDUP-UP(1)