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Full Discussion: Displaying the first field if the second field matches the pattern using Perl
Top Forums Shell Programming and Scripting Displaying the first field if the second field matches the pattern using Perl Post 302727119 by royalibrahim on Monday 5th of November 2012 09:11:18 PM
Old 11-05-2012
Quote:
Originally Posted by elixir_sinari
The code you've provided does what it's supposed to do.

First of all, you are opening the file myfile, reading it completely and then closing the associated filehandle, once for each line in the file dummy_file.

For every line from dummy_file in which the 2nd field $F[1] (split on white-space using the -a run-time switch) matches the pattern patt anchored at the end, the first element of the list slice (split(" ", $i))[0], obtained by splitting the line from myfile on white-space, is displayed.

What exactly are you trying to do? Please elaborate with input and output samples.
Thank you, but the dummy file is just an empty file to fulfill or complete the syntax (else Perl reads from stdin). The actual file in action is "myfile" where I am looping over its contents by reading from the file handle 'F'. The white space splitting is done on the myfile's contents and not of the dummy file.

Lets say, my input is, myfile's contents:

aa bb cc
1a 2a 3a

I would like to get the output as:
aa

where 'bb' is the pattern to be matched.
 

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LEARN ABOUT DEBIAN

unaccent

unaccent(1)						      General Commands Manual						       unaccent(1)

NAME

       unaccent - remove accents from input stream or a string

SYNOPSIS

       unaccent [--debug_low] [--debug_high] [-h] charset [string] [expected]

DESCRIPTION

       With  a	single argument, unaccent reads data from stdin, replaces accented letters by their unaccented equivalent and writes the result on
       stdout.	If the second argument ('string') is provided unaccent transforms it by replacing accented letters by their unaccented equivalent.
       The  result  is	printed on the standard output.  The charset of the input string or the data read from stdin is specified by the 'charset'
       argument (ISO-8859-15 for instance). The output is printed using the same charset.

       If the 'expected' argument is provided, the output string is compared to it. If they are not equal unaccent exits on error.

       unaccent relies on the iconv(3) library to convert from the specified charset to UTF-16BE (or UTF-16 if UTF-16BE  is  not  available).  You
       should check the manual pages for available charsets. On GNU/Linux the command

       iconv -l

       shows all available charsets.

OPTIONS

       --debug_low
	      Prints human readable information about the unaccentuation process. See unac(3) for more information.

       --debug_high
	      Prints very detailed information about the unaccentuation process.  See unac(3) for more information.

       --help -h
	      Prints a short usage and exits.

EXAMPLES

       Remove accents from the string ete and check that the result is ete.

       unaccent ISO-8859-1 ete ete

       Remove accents from file myfile and put the result in file myfile.unaccent

       unaccent ISO-8859-1 < myfile > myfile.unaccent

SEE ALSO

       unac(3), iconv(3)

AUTHOR

       Loic Dachary loic@senga.org
       http://www.senga.org/unac/

								       local							       unaccent(1)
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