Sponsored Content
Top Forums Shell Programming and Scripting perl regular expressions and field search Post 302230651 by dynamox on Saturday 30th of August 2008 02:04:38 PM
Old 08-30-2008
perl regular expressions and field search

Hello guys/gals,

i am sorry as this is probably very simply but i am slowly learning perl and need to convert some old korn shell scripts.

I need to be able to search a file line by line but only match a string at particular location on that line, for example character 20-30. So my file could look something like this:

Code:
apple orange apple
         apple potato apple
         tomato flower orange

i want to be able to search this file for string "orange" but i only want to search for this string at particular position, say from character 7-13. I am used to in bash i can use |awk '{print $2)' to get my second field ..but how would i do it in perl using regular expressions ?

Thanks a bunch
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl regular expressions...

I am writing script that will act like the 'comm' utility. My problem is when trying to read whether the user has entered -123 or -1 or -1...etc. I currently have: if(m/??/g){ print "Good.\n"; } So, this should check for all... (1 Reply)
Discussion started by: DrRo183
1 Replies

2. UNIX for Dummies Questions & Answers

Regular Expressions HELP - PERL

Hello, $line=USING (FILE '/TEST1/FILENAME'5000) I want to reterive the value between ' and ) which is 5000 here. i have tried out the following expressions ... Type 1 : $Var1=`sed -e 's/.*\' //' -e 's\).*$/' $line`; Type 2 : $Var1=`echo $line | awk -F"\'" '{print $2}' | awk -F"\\)"... (1 Reply)
Discussion started by: maxmave
1 Replies

3. Shell Programming and Scripting

Regular Expressions HELP - PERL

Hello, $line=USING (FILE '/TEST1/FILENAME'5000) I want to reterive the value between ' and ) which is 5000 here. i have tried out the following expressions ... Type 1 : $Var1=`sed -e 's/.*\' //' -e 's\).*$/' $line`; Type 2 : $Var1=`echo $line | awk -F"\'" '{print $2}' | awk -F"\\)"... (3 Replies)
Discussion started by: maxmave
3 Replies

4. Shell Programming and Scripting

Search Replace with regular expressions

Hello I have this regular expression: </book>(?:\n)<collection>(.*)</collectioninfo> And I have this peace of text on a FILE <book bookid="3" title="the title 3" remaining = "50" price="100"> <reader readerid="1"><!]></reader> <reader readerid="2"><!]></reader> <reader... (1 Reply)
Discussion started by: dirdamalah
1 Replies

5. Shell Programming and Scripting

Regular expressions - Perl

Hello everybody, I am trying to connect from hp-ux to win 2003 using perl's Net::Telnet module. Seeing the examples in couple of web sites, I saw I have to declare a Prompt => Can somebody please tell me what my regular expression should be? The prompt after I log in is: ... login:... (1 Reply)
Discussion started by: whatever
1 Replies

6. Shell Programming and Scripting

regular expressions using perl script

i have a set of regular expressions. The words in the regular expression should be used to replace the i/p with hyphens '---'. i need perl script to evaluate these regular expression. the words in the regexes when found in the i/p file should be replaced with hyphens '---'. the set of regular... (3 Replies)
Discussion started by: Sgiri1
3 Replies

7. Shell Programming and Scripting

Perl regular expressions don't like the @ ("at") sign.

Take a look at this code: #!/usr/bin/perl use 5.008; $_ = "somename@address.com"; if(/\@\w+\.com/) { print "\n\nmight be an email address\n\n"; } else { print "\n\nnot an email address\n\n"; } Shouldn't the /\@\w+\.com/ evaluate as true? I've also tried: ... (3 Replies)
Discussion started by: mrwatkin
3 Replies

8. Programming

Which language is best suited for regular expressions perl,python.ruby ?

Hello all, i am in a bit of dilema here. i dont know any thing about perl or python. only know a little bit of awk. now unable to take a decission as to which language to go for. my requirement is building a testing framework.suite which will execute ssytem comands remotely on unix... (2 Replies)
Discussion started by: achak01
2 Replies

9. Shell Programming and Scripting

Perl - Regular Expressions - Match complete word only

Hi Team, I have two strings like: xxx|yyy|Arizona Cardinals| Tell Cardinals | Cardinals bbb|Bell Earn, Jr | Bell Earn | Jayhawks | hawks I have a lookup file which has a set of strings. These need to be removed from above two strings Lookup file Contents: Bell Earn, Jr hawks... (2 Replies)
Discussion started by: forums123456
2 Replies

10. Shell Programming and Scripting

PERL Regular Expressions

im trying to extract some tags between and in a file..for eg..the file format is I want the and extracted from the file i.e the tags which is present b/w and I have the regex for extracting the tags from the whole file but how to specify my search within the and... (1 Reply)
Discussion started by: rajkrishna89
1 Replies
ARRAY_UNSHIFT(3)							 1							  ARRAY_UNSHIFT(3)

array_unshift - Prepend one or more elements to the beginning of an array

SYNOPSIS
int array_unshift (array &$array, mixed $value1, [mixed $...]) DESCRIPTION
array_unshift(3) prepends passed elements to the front of the $array. Note that the list of elements is prepended as a whole, so that the prepended elements stay in the same order. All numerical array keys will be modified to start counting from zero while literal keys won't be touched. PARAMETERS
o $array - The input array. o $value1 - First value to prepend. RETURN VALUES
Returns the new number of elements in the $array. EXAMPLES
Example #1 array_unshift(3) example <?php $queue = array("orange", "banana"); array_unshift($queue, "apple", "raspberry"); print_r($queue); ?> The above example will output: Array ( [0] => apple [1] => raspberry [2] => orange [3] => banana ) SEE ALSO
array_shift(3), array_push(3), array_pop(3). PHP Documentation Group ARRAY_UNSHIFT(3)
All times are GMT -4. The time now is 08:57 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy