Perl Split

tarken · 05-17-2010, 04:17 PM

Hello -

I am trying to split a pattern in perl and so far I cannot get it to work. I have a pattern that looks like this:

76|2455311|2455312|00:00:00|00:00:00|Once|0|Donkey | |

I always need to print out the 8th field. So in this case donkey. Here is what I have so far:

Code:

#!/usr/bin/perl

  use strict;
  use warnings;
open (F, "data.pl") || die "Could not open data.pl: $!\n";
my @test = <F>;
close F;

  my @values = split('|', @test);

  foreach my $val (@values) {
    print "$val\n";
  }

  exit 0;

Any help would be greatly appreciated!

Tarken

Sergei Steshenko · 05-17-2010, 04:52 PM

Quote:

Originally Posted by tarken

...
I cannot get it to work.
...

And what exactly doesn't work ?

...

By the way, did you read

perldoc -f split

?

Sergei Steshenko · 05-17-2010, 04:59 PM

Even more specifically, did you carefully line #4 of 'perldoc -f split' ?

In my case the line is:

Code:

      4        split   Splits the string EXPR into a list of strings and returns that list.  By default, empty leading fields are preserved, and empty trailing ones are deleted.
      5                (If all fields are empty, they are considered to be trailing.)

tarken · 05-17-2010, 06:30 PM

Quote:

Originally Posted by Sergei Steshenko

And what exactly doesn't work ?

...

When I run that script on the data that I provided I only get the number 4. I want it to display donkey, because it is the 8th spot. I need this to run on a file full of patterns like the one I provided. I did read through the perldoc, just not understanding it.

Tarken

Sergei Steshenko · 05-17-2010, 06:44 PM

Quote:

Originally Posted by tarken

When I run that script on the data that I provided I only get the number 4. I want it to display donkey, because it is the 8th spot. I need this to run on a file full of patterns like the one I provided. I did read through the perldoc, just not understanding it.

Tarken

No, it's not that you do not understand 'perldoc', it is that you do not analyze the text properly.

So, here is a simpler task for you - first an English sentence to be analyzed:

Jack climbs a high mountain.

The sentence in italics contains the following items:

an entity performing an action;
an entity describing the action;
an entity over/on which the action is performed.

So, first of all, which are the three entities ?

tarken · 05-19-2010, 02:17 PM

Quote:

Originally Posted by Sergei Steshenko

No, it's not that you do not understand 'perldoc', it is that you do not analyze the text properly.

So, here is a simpler task for you - first an English sentence to be analyzed:

Jack climbs a high mountain.

The sentence in italics contains the following items:

an entity performing an action;
an entity describing the action;
an entity over/on which the action is performed.

So, first of all, which are the three entities ?

The man, climbing, mountain.

Sergei Steshenko · 05-19-2010, 06:20 PM

Quote:

Originally Posted by tarken

The man, climbing, mountain.

Good (almost). Though, strictly saying, not "the man", but "Jack", and not "climbing", but "climbs". Now, what kind/type of mountain the man climbs ?

And after answering that question perform the same analysis of already quoted here

Code:

      4        split   Splits the string EXPR into a list of strings and returns that list.  By default, empty leading fields are preserved, and empty trailing ones are deleted.

line, including answer to the

what kind of the entity on/over which the action is performed ?

question.