If I am running a cat|awk|sed on a file to get a bunch of numbers between 1 and 500 billion, how can I stay in stream, and still compare "this value" with "the previous value"?
Really I could do this all in Perl, but if I can get it to work in-stream, its gonna be TONS faster... even if I can... (14 Replies)
Hi
I have a file from which i need to remove the first 4 and the last 2 lines.. i know how to do it with sed but i need to do it in a perl script.. can you please help me how to do that.
Thanks (10 Replies)
Hi
Is there any command to scan thru a file looking for 2 consecutive blank lines and if any remove one of them. Please let me know.
Regards,
Tipsy (6 Replies)
I have a file, we'll call it file.txt. It has thousands of lines of all kinds of output at any given time (ie. foo bar foo bar)
I need to copy out just a portion of the file from Point-A to Point-B. I'd like to save off just that portion to a file called test123xyz.txt.
How do I do that?
... (7 Replies)
Hello,
We have edi files we need to do some extra parsing on.
There is a line that shows up that looks like this:
GE|8,845|000000000
We need to parse the file, find the line ( that begins with GE "^GE" ), and remove the comma(s).
What is the easiest way to do that ? I know I can grab... (5 Replies)
Dear all
I would like to know if you have face to the problems as add
1. 256 MB DDR Ram memory
2. IDE 40 GB slaved hard-disk
my current machine is GA-SIML Rev 1.0, 1.6 GHz CPU, 1GB HDD, 256 MB DDR-Ram memory, as I add another 256 DDR-Ram, and 40 GB Slaved EDI Hard disk it, the systems... (1 Reply)
I am trying to output two command substitutions echo "$(command) $(command)" with a single echo however when using wc -l within the second substitution, that substitution, instead of appearing in order at the end of the line output, it overwrites the beginning of the output line.
I've tried... (2 Replies)
I've one EDI file which is to be parsed into 7 different file.
I managed to extract required segments for a file(HEADER) to a separate file(sample3.dat) and is given below.
$ cat sample3.dat
REF*EI*273543997~
REF*2U*HELLO~
REF*G2*77685|132~
CLM*1000*0.00***12>B>1*N*A*Y*I~
CN1*05~... (5 Replies)
Discussion started by: ashokv3
5 Replies
LEARN ABOUT MOJAVE
english
English(3pm) Perl Programmers Reference Guide English(3pm)NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English;
use English qw( -no_match_vars ) ; # Avoids regex performance penalty
# in perl 5.16 and earlier
...
if ($ERRNO =~ /denied/) { ... }
DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get
triggered just by accessing them (like $0) will still be affected.
For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be
referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module.
See perlvar for a complete list of these.
PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if
your code is to run on perl 5.18 or earlier.
This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters
in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing
use English qw( -no_match_vars ) ;
. It is especially important to do this in modules to avoid penalizing all applications which use them.
perl v5.18.2 2014-01-06 English(3pm)