01-26-2011
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi
I was wondering if it's possible to use a command to get the first 3 characters of a line in a text file, I tried grep but it returns the whole line but I am only interested in the first 3 characters. Is this possible with grep or I need any other command?
Also is it possible deleting from... (2 Replies)
Discussion started by: g-e-n-o
2 Replies
2. UNIX for Dummies Questions & Answers
give this a try and let me know if it works
grep '^' filename
rachael (2 Replies)
Discussion started by: rachael
2 Replies
3. Shell Programming and Scripting
I must remove hex characters 0A and 0D from several fields within an MS Access Table. Since I don't think it can be done in Access, I am trying here.
I am exporting a Table from Access (must be fixed length fields, I think, for my idea to work here) into a text format.
I then want to run a... (2 Replies)
Discussion started by: BAH
2 Replies
4. HP-UX
Hi,
Whats the command or how do you display the hexadecimal characters of an ascii file.
thanks
Bud (2 Replies)
Discussion started by: budrito
2 Replies
5. Shell Programming and Scripting
Hi friends,
I want your help.
I have a flat file. I want a script to search following pattern in it and once it get that pattern it should grep next 7 characters from it and should keep it in output file output.TXT
Pattern is
RSTD3R0*******
In above example, characters in the place of *... (3 Replies)
Discussion started by: anushree.a
3 Replies
6. Programming
Hi All,
My main intension of is to convert the Hexstring stored in a char* into hex and then prefixing it with "0x" and suffix it with ','
This has to be done for all the hexstring char* is NULL.
Store the result prefixed with "0x" and suffixed with ',' in another char* and pass it to... (1 Reply)
Discussion started by: rvan
1 Replies
7. Shell Programming and Scripting
Hello All,
I have a requirement where I need to replaced the hex character - '\x0D' with 2 hex characters - 'x0D' & 'x0A'
I am trying to use SED -
But somehow its not working. Any pointers?
Also the hex character '\x0D' can occur anywhere in the line.
Can this also be accomplished... (6 Replies)
Discussion started by: paragkalra
6 Replies
8. Shell Programming and Scripting
Hi,
I am a bit stuck with displaying characters. I am having values like below in the proper displayable characters. which I would want to print the actual value on the right hand side. I dont want to create an array because I would have to create 255 different values. isnt there another way of... (17 Replies)
Discussion started by: ahmedwaseem2000
17 Replies
9. UNIX for Dummies Questions & Answers
I have the following file consisting of dates and sample measurements:
05��Oct��2010 1.31��
06��Oct��2010 1.32��
07��Oct��2010 1.31��
The hex characters are \xc2\xa0 in sequence.
I have tried to remove the characters as follows:
sed -i '' -e 's/\xc2\xa0//g' file.dat
and as follows... (6 Replies)
Discussion started by: figaro
6 Replies
10. HP-UX
Hi guys,
First off, i'm a complete noob to UNIX and LINUX so apologies if I don't understand the basics!
I have a file which contains a hex value of '0D' at the end of each line when I look at it in a hex viewer.
I need to change it so it contains a hex value of '0D0A0A'
I thought... (10 Replies)
Discussion started by: AndyBSG
10 Replies
LEARN ABOUT DEBIAN
tie::hash::regex
Tie::Hash::Regex(3pm) User Contributed Perl Documentation Tie::Hash::Regex(3pm)
NAME
Tie::Hash::Regex - Match hash keys using Regular Expressions
SYNOPSIS
use Tie::Hash::Regex;
my %h;
tie %h, 'Tie::Hash::Regex';
$h{key} = 'value';
$h{key2} = 'another value';
$h{stuff} = 'something else';
print $h{key}; # prints 'value'
print $h{2}; # prints 'another value'
print $h{'^s'}; # prints 'something else'
print tied(%h)->FETCH(k); # prints 'value' and 'another value'
delete $h{k}; # deletes $h{key} and $h{key2};
or (new! improved!)
my $h : Regex;
DESCRIPTION
Someone asked on Perlmonks if a hash could do fuzzy matches on keys - this is the result.
If there's no exact match on the key that you pass to the hash, then the key is treated as a regex and the first matching key is returned.
You can force it to leap straight into the regex checking by passing a qr'ed regex into the hash like this:
my $val = $h{qr/key/};
"exists" and "delete" also do regex matching. In the case of "delete" all vlaues matching your regex key will be deleted from the hash.
One slightly strange thing. Obviously if you give a hash a regex key, then it's possible that more than one key will match (consider
c<$h{qw/./}>). It might be nice to be able to do stuff like:
my @vals = $h{$pat};
to get all matching values back. Unfortuately, Perl knows that a given hash key can only ever return one value and so forces scalar context
on the "FETCH" call when using the tied interface. You can get round this using the slightly less readable:
my @vals = tied(%h)->FETCH($pat);
ATTRIBUTE INTERFACE
From version 0.06, you can use attributes to define your hash as being tied to Tie::Hash::Regex. You'll need to install the module
Attribute::Handlers.
METHODS
FETCH
Get a value from the hash. If there isn't an exact match try a regex match.
EXISTS
See if a key exists in the hash. If there isn't an exact match try a regex match.
DELETE
Delete a key from the hash. If there isn't an exact match try a regex match.
AUTHOR
Dave Cross <dave@mag-sol.com>
Thanks to the Perlmonks <http://www.perlmonks.org> for the original idea and to Jeff "japhy" Pinyan for some useful code suggestions.
COPYRIGHT
Copyright (C) 2001-8, Magnum Solutions Ltd. All Rights Reserved.
LICENSE
This script is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
perl(1).
perltie(1).
Tie::RegexpHash(1)
perl v5.10.0 2008-06-30 Tie::Hash::Regex(3pm)