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Full Discussion: Regex and variable assignment
Top Forums UNIX for Dummies Questions & Answers Regex and variable assignment Post 302615091 by maximus73 on Thursday 29th of March 2012 07:06:13 AM
Old 03-29-2012
Regex and variable assignment
Hi there,
I really didn't want to have to waste people's time and ask this, but after 2 hours and running out of my own time I've decided to ask..

Basically I have a file in the format:

word: other words; more words here; last word
word: more words here; last word
(etc) x 100

Where the occurrence of other words/more words can be zero or more.

My aim is to count the amount of characters that come after the ':'.
My logic was simple, use awk to create a regex that equals from : to $ (i.e. from : to end of file). And then print its length.

I couldn't work out how to do that, but figured I'd be able to print a variable's length quite easily.
So I've been trying to assign a variable to the regex, and then print its length.
But I'm having trouble assigning a variable to a regex.
I feel as if there is some basic key concept I'm missing...

How do I do this?

I currently have:

awk '$var ~ /:.*$/ {print (length)var}' a.txt

Also if I wanted to print both the regex and its length, would it be:

{print (length)var, var}

I'm sure there's some basic concept or syntax I'm missing here, can someone please explain to me if you see easily why I'm going wrong?

Thanks heaps,
 

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LEARN ABOUT DEBIAN

sql::reservedwords::oracle

SQL::ReservedWords::Oracle(3pm) 			User Contributed Perl Documentation			   SQL::ReservedWords::Oracle(3pm)

NAME

       SQL::ReservedWords::Oracle - Reserved SQL words by Oracle

SYNOPSIS

	  if ( SQL::ReservedWords::Oracle->is_reserved( $word ) ) {
	      print "$word is a reserved Oracle word!";
	  }

DESCRIPTION

       Determine if words are reserved by Oracle Database.

METHODS

       is_reserved( $word )
	   Returns a boolean indicating if $word is reserved by either Oracle7, Oracle8i, Oracle9i or Oracle10g.

       is_reserved_by_oracle7( $word )
	   Returns a boolean indicating if $word is reserved by Oracle7.

       is_reserved_by_oracle8( $word )
	   Returns a boolean indicating if $word is reserved by Oracle8i.

       is_reserved_by_oracle9( $word )
	   Returns a boolean indicating if $word is reserved by Oracle9i.

       is_reserved_by_oracle10( $word )
	   Returns a boolean indicating if $word is reserved by Oracle10g.

       reserved_by( $word )
	   Returns a list with Oracle versions that reserves $word.

       words
	   Returns a list with all reserved words.

EXPORTS

       Nothing by default. Following subroutines can be exported:

       is_reserved
       is_reserved_by_oracle7
       is_reserved_by_oracle8
       is_reserved_by_oracle9
       is_reserved_by_oracle10
       reserved_by
       words

SEE ALSO

       SQL::ReservedWords

       <http://www.oracle.com/technology/documentation/>

AUTHOR

       Christian Hansen "chansen@cpan.org"

COPYRIGHT

       This program is free software, you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.8.8							    2008-03-28					   SQL::ReservedWords::Oracle(3pm)
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