05-21-2009
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
hi all
i wrote a shell script which uses perl script my code is :
>cat filename | while read i
>do
>perl -e 'require "/home/scripts/abc.pl" ; abc("$i")'
>done
perl script used will simply check syntax of Cobol programs but it didn't work for me so i asked my colleague he suggested... (1 Reply)
Discussion started by: zedex
1 Replies
2. UNIX for Dummies Questions & Answers
I have a slew of files for historical reference.
Each file has a unique line in the file, such as "Today's datetime is:"
Each file also contains a unique set of characters on line X, such as "DMX Info." This line number will be different each time a new file is generated. So, for one... (7 Replies)
Discussion started by: jjp
7 Replies
3. UNIX for Advanced & Expert Users
hi all
i was going through some perl code i came across this line and i am not getting what is exactly going on ..
$$this{localtion} = GetName->GetVarName("EXE_DIR") ;
what is the red part doing in above code (2 Replies)
Discussion started by: zedex
2 Replies
4. Shell Programming and Scripting
find . -type f -name "*.sql" -print|xargs perl -i -pe 's/pattern/replaced/g'
this is simple logic to find and replace in multiple files & folders
Hope this helps.
Thanks
Zaheer (0 Replies)
Discussion started by: Zaheer.mic
0 Replies
5. Shell Programming and Scripting
Can someone please explain what tr#A-Za-z0-9+/# -_#; means in perl? (4 Replies)
Discussion started by: 3junior
4 Replies
6. UNIX for Dummies Questions & Answers
Could you please tell the meaning of Below mentioned perl script lines:
format OWNER_TOTAL =
@< Owner Code @<<<<<<total: @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @######
#.##
$prev_cust_type, $prev_owner_code,... (2 Replies)
Discussion started by: vinothrajan55
2 Replies
7. Shell Programming and Scripting
I am using this line of perl code to change the file format and remove ^M at the end of each line in files:
perl -i -pe's/\r$//;' <name of file here>
Can you explain to me what this code does, and translate it into bash/awk/sed? (2 Replies)
Discussion started by: locoroco
2 Replies
8. UNIX for Beginners Questions & Answers
@sorted = sort { $a <=> $b } @unsorted;
I am having hard time understanding how this works? I know the output but interested to know the working.
Thanks in advance. (2 Replies)
Discussion started by: Tanu
2 Replies
9. UNIX for Beginners Questions & Answers
sub uniq {
my %h;
return grep { !$h{$_}++ } @_
}
The above code is to remove duplicates from array.
I am having hard time understanding below things (basically around highlighted code in bold)-
when was the value inserted in hash?
and are we only adding a key in Hash not... (1 Reply)
Discussion started by: Tanu
1 Replies
LEARN ABOUT SUNOS
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)