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Perl regex
Post 302838795 by jhamaks on Tuesday 30th of July 2013 01:17:10 PM
07-30-2013
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For a programming exercise, I am mean to design a Perl script that detects double letters in a text file.
I tried the following expressions
# Check for any double letter within the alphabet
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Hi,
Can anyone help me to find regular expression for the following in Perl?
"The string can only contain lower case letters (a-z) and no more than one of any letter."
For example: "table" is accepted, whether "dude" is not.
I have coded like this:
$str = "table";
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I have got numbers like
l255677
l376039
l188144
l340482
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l254113
to match the numbers starting with '13' what would be the regex
=~/13(.*)/ =======>This is not working ....
But for user123,user657
regex =~/user(.*)/ ========>works
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I am having trouble parsing rpm filenames in a shell script.. I found a snippet of perl code that will perform the task but I really don't have time to rewrite the entire script in perl. I cannot for the life of me convert this code into something sed-friendly:
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Hi,
I get the following when I cat a file *.log
xxxxx
=====
dasdas gwdgsg fdsagfsag agsdfag
=====
random data
=====
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the random data should be printed.
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HI,
I'm new to perl and need simple regex for reading a file using my perl script.
The text file reads as -
filename=/pot/uio/current/myremificates.txt
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Hi Guys
I have the following regex
$OSRELEASE = $1 if ($output =~ /(Mac OS X (Server )?10.\d)/);
output is currently
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when the introduction of Mac 10.8 output changes to
OS X 10.8.2
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Could anyone please make me understand how the ?= works below ..
After executing this I am getting the same output.
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I am not a big expert in regex and have just little understanding of that language.
Could you help me to understand the regular Perl expression:
^(?!if\b|else\b|while\b|)(?:+?\s+){1,6}(+\s*)\(*\) *?(?:^*;?+){0,10}\{
------
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Experts -
I found a script on one of the servers that I work on and I need help understanding
one of the lines.
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Can someone help me with this?
Here's the script...
#!/usr/bin/perl
use strict;
use... (2 Replies)
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LEARN ABOUT DEBIAN
keyhead
keyhead(1) General Commands Manual keyhead(1) Name keyhead - Change FITS or IRAF header keyword names Synopsis keyhead [-hknv] <FITS or IRAF file> kw1=kw1a kw2=kwd2a ... kwn=kwdna Description Change the names of keywords in FITS or IRAF image headers. Each current image keyword whose entry is to be modified should be followed by an equal sign and a second keyword, with no intervening spaces. If the -r option is used, the value of the second keyword is transfered to that of the first. Otherwise, the name of the first keyword is changed to the second keyword. To change keywords in a list of files, sub- stitute @<listfile> for the file names on the command line. To change a lot of keywords, put them, one pair separated by an = sign with no spaces per line, in a file and substitute @<keylistfile> on the command line. If two @ commands are present, the program will figure out which contains file names and which contains keywords. Lines in a keyword list file which do not contain an = are ignored. Options -h Write HISTORY line into output header with sethead version, current date and time, and names of keywords set. -k Write KEYHEAD keyword into output header with the keyhead version, current date and time, and names of keywords whose names are changed. If a KEYHEAD keyword already exists, move the old value to a HISTORY line before writing the new value -n Write a new file with an added "e" before the extension. -r letter Replace value of 1st keyword with value of 2nd keyword instead of changing the name of the 1st keyword to the 2nd keyword. The 2nd keyword remains in the header. If the 1st keyword does not exist in the header, it is created. -v Print confirmations of each keyword change. Web Page http://tdc-www.harvard.edu/software/wcstools/keyhead.html Author Doug Mink, SAO (dmink@cfa.harvard.edu) 6 July 2001 WCSTools keyhead(1)