Speeding up search and replace in a for loop Post: 302657465

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl: Search for string on line then search and replace text

Hi All, I have a file that I need to be able to find a pattern match on a line, search that line for a text pattern, and replace that text. An example of 4 lines in my file is: 1. MatchText_randomNumberOfText moreData ReplaceMe moreData 2. MatchText_randomNumberOfText moreData moreData...

2. UNIX for Dummies Questions & Answers

Speeding up a Shell Script (find, grep and a for loop)

Hi all, I'm having some trouble with a shell script that I have put together to search our web pages for links to PDFs. The first thing I did was: ls -R | grep .pdf > /tmp/dave_pdfs.outWhich generates a list of all of the PDFs on the server. For the sake of arguement, say it looks like...

3. Shell Programming and Scripting

awk - replace number of string length from search and replace for a serialized array

Hello, I really would appreciate some help with a bash script for some string manipulation on an SQL dump: I'd like to be able to rename "sites/WHATEVER/files" to "sites/SOMETHINGELSE/files" within the sql dump. This is quite easy with sed: sed -e...

4. Programming

PERL, search and replace inside foreach loop

Hello All, Im a Hardware engineer, I have written this script to automate my job. I got stuck in the following location. CODE: .. .. ... foreach $key(keys %arr_hash) { my ($loc,$ind,$add) = split /,/, $arr_hash{$key}; &create_verilog($key, $loc, $ind ,$add); } sub create_verilog{...

5. UNIX for Dummies Questions & Answers

Speeding/Optimizing GREP search on CSV files

Hi all, I have problem with searching hundreds of CSV files, the problem is that search is lasting too long (over 5min). Csv files are "," delimited, and have 30 fields each line, but I always grep same 4 fields - so is there a way to grep just those 4 fields to speed-up search. Example:...

6. Shell Programming and Scripting

perl search and replace - search in first line and replance in 2nd line

Dear All, i want to search particular string and want to replance next line value. following is the test file. search string is tmp,??? ,10:1 "???" may contain any 3 character it should remain the same and next line replace with ,10:50 tmp,123 --- if match tmp,??? then...

7. Shell Programming and Scripting

search replace with loop and variable

Hi, could anyone help me with this, tried several times but still not getting it right or having enough grounding to do it outside of javascript: Using awk or sed or bash: need to go through a text file using a for next loop, replacing substrings in the file that consist of a potentially multi...

8. Shell Programming and Scripting

Nested search in a file and replace the inner search

Hi Team, I am new to unix, please help me in this. I have a file named properties. The content of the file is : ##Mobile props east.url=https://qa.east.corp.com/prop/end west.url=https://qa.west.corp.com/prop/end south.url=https://qa.south.corp.com/prop/end...

9. Shell Programming and Scripting

Speeding up substitutions

Hi all, I have a lookup table from which I am looking up values (from col1) and replacing them by corresponding values (from col2) in another file. lookup file a,b c,d So just replace a by b, and replace c by d. mainfile a,fvvgeggsegg,dvs a,fgeggefddddddddddg...

10. Shell Programming and Scripting

Help speeding up script

This is my first experience writing unix script. I've created the following script. It does what I want it to do, but I need it to be a lot faster. Is there any way to speed it up? cat 'Tax_Provision_Sample.dat' | sort | while read p; do fn=`echo $p|cut -d~ -f2,4,3,8,9`; echo $p >> "$fn.txt";...

LEARN ABOUT REDHAT

mac2unix

dos2unix(1)						      General Commands Manual						       dos2unix(1)

NAME

       dos2unix - DOS/MAC to UNIX text file format converter

SYNOPSYS

       dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

       [-hkqV] [--help] [--keepdate] [--quiet] [--version]

DESCRIPTION

       This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format.

OPTIONS

       The following options are available:

       -h --help
	      Print online help.

       -k --keepdate
	      Keep the date stamp of output file same as input file.

       -q --quiet
	      Quiet mode. Suppress all warning and messages.

       -V --version
	      Prints version information.

       -c --convmode convmode
	      Sets conversion mode. Simulates dos2unix under SunOS.

       -o --oldfile file ...
	      Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.

       -n --newfile infile outfile ...
	      New  file  mode.	Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
	      used or you WILL lost your files.

EXAMPLES

       Get input from stdin and write output to stdout.

	      dos2unix

       Convert and replace a.txt. Convert and replace b.txt.

	      dos2unix a.txt b.txt

	      dos2unix -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.  Convert	c.txt  from  Mac  to  Unix
       ascii format.

	      dos2unix a.txt -c iso b.txt

	      dos2unix -c ascii a.txt -c iso b.txt

	      dos2unix -c mac a.txt b.txt

       Convert and replace a.txt while keeping original date stamp.

	      dos2unix -k a.txt

	      dos2unix -k -o a.txt

       Convert a.txt and write to e.txt.

	      dos2unix -n a.txt e.txt

       Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.

	      dos2unix -k -n a.txt e.txt

       Convert and replace a.txt. Convert b.txt and write to e.txt.

	      dos2unix a.txt -n b.txt e.txt

	      dos2unix -o a.txt -n b.txt e.txt

       Convert c.txt and write to e.txt. Convert and replace a.txt.  Convert and replace b.txt. Convert d.txt and write to f.txt.

	      dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt

DIAGNOSTICS

BUGS

       The program does not work properly under MSDOS in stdio processing mode.  If you know why is that so, please tell me.

AUTHORS

       Benjamin Lin - <blin@socs.uts.edu.au>

       Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org>

MISCELLANY

       Tested environment:

	      Linux 1.2.0 with GNU C 2.5.8

	      SunOS 4.1.3 with GNU C 2.6.3

	      MS-DOS 6.20 with Borland C++ 4.02

       Suggestions and bug reports are welcome.

SEE ALSO

       unix2dos(1) mac2unix(1)

1995.03.31							   dos2unix v3.0						       dos2unix(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl: Search for string on line then search and replace text

Discussion started by: Crypto

2. UNIX for Dummies Questions & Answers

Speeding up a Shell Script (find, grep and a for loop)

Discussion started by: Dave Stockdale

3. Shell Programming and Scripting

awk - replace number of string length from search and replace for a serialized array

Discussion started by: otrotipo

4. Programming

PERL, search and replace inside foreach loop

Discussion started by: riyasnr007