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Full Discussion: [Perl] Split lines into array - variable line items - variable no of lines.
Top Forums Shell Programming and Scripting [Perl] Split lines into array - variable line items - variable no of lines. Post 302559519 by ejdv on Tuesday 27th of September 2011 09:42:45 AM
Old 09-27-2011
[Perl] Split lines into array - variable line items - variable no of lines.
Hi,

I have the following lines that I would like to see in an array for easy comparisons and printing:

Example 1:

Code:
field1,field2,field3,field4,field5
value1,value2,value3,value4,value5

Example 2:

Code:
field1,field3,field4,field2,field5,field6,field7
value1,value3,value4,value2,value5,value6,field7
value1,value3,value4,value2,value5,value6,field7
value1,value3,value4,value2,value5,value6,field7

So, the number of lines, the number of fields and the field order can differ.

As output I would like to see:

Code:
field2,field3,field5
value2,value3,value5

Code:
field2,field3,field5
value2,value3,value5
value2,value3,value5
value2,value3,value5

Those to be printed fields and values are always present, independent from the number of fields and the field order.
And field1 and value1 are always on the first place.
The background is that has to run on different systems and those different systems will deliver different field numbers and field order.

I started with something like this, but got stuck somehow due to a lack of Perl knowledge.
Would it have been a more static input then I it would be a bit more easier.

Code:
my @LineItems;
my $LineItems;
my $FieldValue;
my $i;
my $NumItems;
my $LineCount;

open GETLINES, "cat /tmp/lines.txt |");
$LineCount = 0;
while ( $Line = <GETLINES> ) {
  if ( $Line =~ /^Field1,/ ) {
    $LineCount++;
    @LineItems = split (/,/, $Line);
    $NumItems = @LineItems;
    for ( $i = 1; $i < $NumItems; $i++ ) {
       $FieldValue{$i} = $LineItems[$i];
    }
  }
  if ( $Line =~ /^Value1,/ ) {
    $LineCount++;
    @LineItems = split (/,/, $Line);
    $NumItems = @LineItems;
    for ( $i = 1; $i < $NumItems; $i++ ) {
      $FieldValue{$i} = $LineItems[$i];
    }
  }
}

I would appreciate any kind of assistance.

ejdv
Last edited by Scott; 09-27-2011 at 10:54 AM.. Reason: Please use code tags for code
 

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LEARN ABOUT CENTOS

paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do rtl layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.

       --bottom-margin=bm
	      Set bottom margin in postscript points (1/72 inch). Default is 36.

       --top-margin=tm
	      Set top margin. Default is 36.

       --left-margin=lm
	      Set left margin. Default is 36.

       --right-margin=rm
	      Set right margin. Default is 36.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --encoding=ENCODING
	      Assume the documentation encoding is ENCODING.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)
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