I am using Perl version 5.8.4 and trying to understand the use of regular expression. Following is my code and output.
Output:-
First Word (using \A): Perl
Line Starts (using ^): Perl Scripting
I know
* (star) is used to 'Matches 0 or more occurrence of preceding expression'.
? (question mark) is used to 'Matches 0 or 1 occurrence of preceding expression'.
But I did not understand how both (*?) are working together in above piece of code.
i can only find the first occurance of a pattern how do i set it to loop untill all occurances have changed.
#! /usr/bin/perl
use POSIX;
open (DFH_FILE, "./dfh") or die "Can not read file ($!)";
foreach (<DFH_FILE>) {
if ($_ !~ /^#|^$/) {
chomp;
... (1 Reply)
hi i am trying to get digits inside brackes from file , whose structure is defined below
CREATE TABLE TELM
(SOC_NO CHAR (3) NOT NULL,
TXN_AMOUNT NUMBER (17,3)
SIGN_ON_TIME CHAR (8)
TELLER_APP_LIMIT NUMBER (17,3)
FIL01 ... (2 Replies)
Hello
I got the below one from in one of this forums
For Ex: Loading File System Networking in nature
now i need to extract the patterns between the words File and Networking :
i.e. sample output: System
cmd used : cat <file> | sed 's/.*File //' | sed 's/Closing.*$//'
Actually... (0 Replies)
Hi,
I got doubt in Pattern matching, could you tell me how the following differs in action ??
if ( $line1==/$line2/ )
if ( $line1=~/$line2/ )
if ( $line1=~m/$line2/)
What is the significance of '~' in matching.
Thanks in advance
CoolBhai (5 Replies)
Hello experts,
I have a file containing the following text(shortened here).
File Begin
----------
< # Billboard.d3fc1302a677.imagePath=S:\\efcm_T4
< Billboard.d3fc1302a677.imagePath=S:\\efcm_T4
---
> # Billboard.d3fc1302a677.imagePath=S:\\efcm_Cassini
>... (2 Replies)
Hi experts,
I have many occurances of the following headers in a file. I need to grep for the word changed/inserted in the header, calculate the difference between the two numbers and list the count incrementally.
Headers in a file look like this:
-------------------
---------------------... (6 Replies)
I am doing a file patterhn matching for a text file in PERL
I am using this,,, but it says that no file is found
$filepattern = '\d{1,4}.*A0NW9693.NDM.HBIDT.*.AD34XADJ.txt';
Can anyone help me out with Perl Pattern Matching concepts and how to do pattern matching for this txt file:... (4 Replies)
I have a 2 files in .gz format and it consists of 5 million lines the format of the file would be
gzcat file1.gz | more
abcde
aerere
ffgh56
..
..
12345
gzcat file2.gz | more
abcde , 12345 , 67890,
ffgh56 , 45623 ,12334
whatever the string is in the file1 should be matched... (3 Replies)
My log file looks as given below, its actually a huge file around 1 GB and these are some of the line:
conn=5368758 op=10628050 msgId=64 - RESULT err=0 tag=101 nentries=1 etime=0
conn=7462122 op=-1 msgId=-1 - fd=247 slot=247 LDAPS connection from 10.13.18.12:37645 to 10.18.6.45
conn=7462122... (5 Replies)
Hi,
I have a list of IP, eg :
192.168.0.15
192.168.0.24
192.168.2.110
192.168.2.200
And I would like the shortest pattern who match with '192.168.0' and '192.168.2' (without the last dot and number). (7 Replies)
Discussion started by: X-Or
7 Replies
LEARN ABOUT CENTOS
ppi::token::word
PPI::Token::Word(3) User Contributed Perl Documentation PPI::Token::Word(3)NAME
PPI::Token::Word - The generic "word" Token
INHERITANCE
PPI::Token::Word
isa PPI::Token
isa PPI::Element
DESCRIPTION
A "PPI::Token::Word" object is a PPI-specific representation of several different types of word-like things, and is one of the most common
Token classes found in typical documents.
Specifically, it includes not only barewords, but also any other valid Perl identifier including non-operator keywords and core functions,
and any include "::" separators inside it, as long as it fits the format of a class, function, etc.
METHODS
There are no methods available for "PPI::Token::Word" beyond those provided by its PPI::Token and PPI::Element parent classes.
We expect to add additional methods to help further resolve a Word as a function, method, etc over time. If you need such a thing right
now, look at Perl::Critic::Utils.
literal
Returns the value of the Word as a string. This assumes (often incorrectly) that the Word is a bareword and not a function, method,
keyword, etc. This differs from "content" because "Foo'Bar" expands to "Foo::Bar".
method_call
Answers whether this is the name of a method in a method call. Returns true if yes, false if no, and nothing if unknown.
TO DO
- Add "function", "method" etc detector methods
SUPPORT
See the support section in the main module.
AUTHOR
Adam Kennedy <adamk@cpan.org>
COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the LICENSE file included with this module.
perl v5.16.3 2011-02-26 PPI::Token::Word(3)