How would one go about deleting the first two characters on each line of a file on Unix? I thought about using awk, but cannot seem to find if it can explicitly do this. In this case there might or might not be a field separator. Meaning that the data might look like this.
01999999999... (5 Replies)
I have a file that looks like this:
It is a huge file and basically I want to delete everything at the > line except for the number after “C”.
>c1154... (2 Replies)
I have two files abc.dat and sant.dat (Big file 60k rows)
for every line's 1,4 of abc.dat need to seach if this is present on 28,4 of sant.dat every line.
if its present the output needs to go to bde.dat
Example:
contents abc.dat
aaaa
bbbb
cccc
dddd
contents sant.dat
this is... (4 Replies)
Hi
I have a file which contains wrong XML, There are some garbage characters at the end of line that I want to get rid of. Example:
<request type="product" ><attributes><pair><name>q</name><value><!]></value></pair><pair><name>start</name><value>1</value></pair></attributes></request>�J ... (7 Replies)
Hi,
I have a weird requirement. I am having a file with 12fields in it and the end of the line for each record is "\n" (Just \n and no carriage returns) and the field delimiter is "|". Problem is I can have new line characters in any field in the data and these new line characters can even come... (11 Replies)
Hi,
I am trying to get an output like :
+----------------------------------+ ----------- +
+ some variable substitution + some text +
Is there a way I can specify in printf (in ksh) the particular position I want to print a character, and also repeat a character from... (1 Reply)
Hi gurus,
I am trying to figure out how to extract substring from file line (all lines in file), as specified position and specified legth.
Example input (file lines)
dhaskjdsa dsadhkjsa dhsakjdsad hsadkjh
dsahjdksahdsad sahkjd sahdkjsahd sajkdh adhjsak
I want to extract substring on... (5 Replies)
I have several questions about using awk. I'm hoping someone could lend me a hand. (I'm also hoping that my questions make sense.)
I have a file that contains pipe separated data. Each line has similar data but the number of fields and the field position on each line is variable. ... (3 Replies)
I have a file with 100 lines. On 50 th line , from position 5 to rest of the data , I need to change the occurrence of A to B and Occurrence of M to N.
Input file :
Line1
Line2
Line3
--
--
12345ABCDEFM
---
--
Line 100
Output
Line1
Line2 (40 Replies)
Hi,
I need to remove line breaks from a file, but only the ones at specific position.
Input file:
this is ok
this line is divided at posit
ion 30. The same as this one,
also position 30
the rest of lines are ok
with different lengths
The longest ones are always s
plitted at same... (15 Replies)
Discussion started by: qranumo
15 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)