to parse a string

Similar Threads:

1.Parsing a string into an array

Hello

I am getting a strange error where I am trying to split a string into 
an array. The string is a line obtained from doing a directory of a 
disk. The error message is:

Reference to nonexistent group in regex; marked by <-- HERE in m/ 
Directory of C
:\Documents and Settings\Andrew\Application 
Data\ActiveState\KomodoIDE\4 <-- HER
E .1/ at D:\Perl Scripts\remove_duplicate_files.pl line 56.

The line in where it happens is the line of code with the split.

Thanks,
Andrew


#
# Find all the files
#
@file_list = `dir c: /S`;

#
# Build the list of directories and files
#
$temp_index = 0;

$file_index = 0;

$directory_index = 0;

$dir_list_size = scalar(@file_list);

print $dir_list_size;
print "\n:";

while ($temp_index < $dir_list_size)
{
    chomp @file_list[$temp_index];

    print @file_list[$temp_index];
    print "\n";

    if (@file_list[$temp_index] ne "")
    {
       #
       #
       @parse_line = split(@file_list[$temp_index]);

       # $line_size = scalar(@parse_line);
       $line_size = 0;

       if ($line_size > 0)
       {
          #print @parse_line[0];
          #print "\n";

          #
          # Determine if this is a directory and if so add it to the
          # directory array and increment the index
          #
          if (@parse_line[1] eq "Directory")
          {
             #$directory_list = @parse_line[1];
             #$directory_index =$directory_index + 1;
             #print "is a Directory\n";
          }
          else
          {
             ##$actual_files[file_index] = @parse_line[0];
             # $file_size[file_index] = @parse_line[4];
             #$file_deleted[file_index] = 0;

             #$file_index = $file_index + 1;
             #print "not a directory \n";
          }
       }
    }

    $temp_index = $temp_index + 1;
}
   

2.module for parsing a string into a formula

Sorry if I'm not saying this right...

I am coming from a C++ environment, that newsgroup suggested PERL as a
possible answer for my need. I have no experience with PERL at all, so will
have to do my homework if someone says there is a way.

I need a function ( module? ) that can take a string expression "(1 + 2) *
(3 + 4)" and return the answer of "21". It can be either a numerical value,
or a string value does not matter from this point.

Any pointers in the right direction would be welcome. A commercial software
package would be acceptable as well.

Thank you in advance

Michael

3.Parse a String that probably really simple to do

  my @content; # Used for parsing HTML

  # Parse classes
  @content = split /^/m, $mech->content;
  for my $i (@content)
  {
    # Print class information
    if ($i =~ /<td align='left' class='PSLEVEL2GRIDROW'
height='20'><span class\
='PSHYPERLINKDISABLED'>/ )
    {
         #parse the string to get only the text in between <td><span>
and </br>
         #then print it
         #how do i parse the text in between these and print it

         print "$i\n";
    }
  }

the lines im looking for in the html are always......
<td align='left' class='PSLEVEL2GRIDROW' height='20'><span
class='PSHYPERLINKDISABLED'>"THE TEXT I WANT FROM THE VARIABLE"</BR>


can someone help me or give me a link explaining reg expressions

thanks in advance

4.Module to parse CSV string

Hi,

I'm looking for a module or a perl code snippet to parse optionally- 
quoted, comma-separated values.

The most obvious candidate, Text::CSV, won't do the job for two reasons:

-- it only recognizes double-quotes as the quote character.  My input  
uses single-quotes.
-- including the quote character within a quoted value requires  
doubling the literal quote character (i.e. "I said ""Hi""").  My  
input uses an escape character ('Henry\'s').

I'd like to be able to parse the following example ...

'George',123,'Harry\'s',,'Tuesday, Thursday'

... into five fields:

George
123
Harry's

Tuesday, Thursday

This seems to me to be relatively straightforward Unix-style (unlike  
what Text::CSV recognizes, which looks to me more like IBM mainframe  
syntax).  Have I overlooked a tool that will do this for me?

Thanks folks..
Chap

5.help parsing a string

hi,

i have a string

$str="hi|i|am|a|perl|script";

i want to extract the words that are separeated by a '|' into an array.

i tried using the split() function, but it worked for cases where the
'|' was replaced bya another char like say a ':'

can anyone help me in this regard?

6. Parsing a string [regexp]

7. parsing long strings

8. Parse numeric string