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Full Discussion: Perl script to read string from file#1 and find/replace in file#2
Top Forums Shell Programming and Scripting Perl script to read string from file#1 and find/replace in file#2 Post 302951651 by pchang on Saturday 8th of August 2015 11:37:25 PM
Old 08-09-2015
Perl script to read string from file#1 and find/replace in file#2
Hello Forum.

I have a file called abc.sed with the following commands;

s/1/one/g
s/2/two/g
...

I also have a second file called abc.dat and would like to substitute all occurrences of "1 with one", "2 with two", etc and create a new file called abc_new.dat

Code:
sed -f abc.sed abc.dat > abc_new.dat

For small files, this command works fine but for large files, it's very slow

I read that Perl might be faster in doing this kind of operation.

Can you please help me write the Perl code if you think it can work faster?

I am a newbie in Perl scripting.

Thanks and appreciate all the help you can provide.
 

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LEARN ABOUT SUNOS

unknown

UNKNOWN(1)						      General Commands Manual							UNKNOWN(1)

NAME

       unknown - identify possible genotypes for unknowns

SYNOPSIS

       A program to rapidly identify which genotypes are possible for individuals typed as unknowns in the input pedigree.

       unknown [ -cl ]

DESCRIPTION

       unknown infers possible genotypes and mating combinations for parents with unknown genotypes for ilink(1), mlink(1) and linkmap(1).

OPTIONS

       -c     Use conditional allele frequencies.

       -l     Choose a good set of loop breakers automatically.

RETURN VALUE

       0     Successful completion

ERRORS

       10    File not found
       255   Failure

EXAMPLES

       Normally, unknown(1) is run immediately prior to its sister programs, ilink(1), mlink(1) and linkmap(1), like this:

       unknown
       mlink

FILES

       unknown(1) reads the two files pedfile.dat and datafile.dat as its own input and produces various temporary files that are used as input to
       the next program. These temporary files are ipedfile.dat, upedfile.dat, speedfile.dat and newspeedfile.dat.

NOTES

       unknown(1) is part of the FASTLINK package, which is a re-implementation of the LINKAGE suite  of  computer  tools  that  help  investigate
       genetic linkage as first proposed G.M. Lathrop, J.M. Lalouel, C. Julier, and J. Ott.

AUTHORS

       Dylan Cooper, Alejandro Schaffer, and Tony Schurtz based on work originally by Jurg Ott, Ph.D, et. al.

       This manual page was written by Elizabeth Barham <lizzy@soggytrousers.net> for the Debian GNU/Linux system (but may be used by others).

WORD-WIDE-WEB
       http://www.ncbi.nlm.nih.gov/CBBResearch/Schaffer/fastlink.html

SEE ALSO

       ilink(1), linkmap(1), lodscore(1), mlink(1).

								  April 15, 2003							UNKNOWN(1)
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