Re: This looks like whitespace in my CSV but doesn't seem to be

in reply to This looks like whitespace in my CSV but doesn't seem to be

This one way to delete leading and trailing spaces from CSV input.

#!/usr/bin/perl -w
use strict; 

use Text::CSV;
use Data::Dumper; # a core module
use Data::Dump qw(pp);

open my $io, '<', 
\q{"My Company","Gavin","Henry ","ghenry@ghenry.co.uk"," 1.00"};

my $csv = Text::CSV->new(); # nothing "fancy" needed here
                            # defaults are fine

while ( my $row = $csv->getline($io) ) 
{
   
   my @fields =map {  
                      s/^\s*//;  #delete leading spaces
                      s/\s*$//;  #delete trailing spaces
                      $_;  #this is the "return value" from map
                           #map returns the value of the last
                           #statement - without this $_; you
                           #get the zero or non-zero scalar value
                           #of the last s/// statement
                   } @$row;
   print "Using pp from Data::Dump...\n";
   print pp \@fields;
   print "\n";
   print "Using Dumper from Data::Dumper...\n";
   print Dumper \@fields;
   print "\n";
   print "5th field is $fields[4]\n";

}
__END__
Prints:

Using pp from Data::Dump...
["My Company", "Gavin", "Henry", "ghenry\@ghenry.co.uk", "1.00"]
Using Dumper from Data::Dumper...
$VAR1 = [
          'My Company',
          'Gavin',
          'Henry',
          'ghenry@ghenry.co.uk',
          '1.00'
        ];

5th field is 1.00
[download]

Comment on Re: This looks like whitespace in my CSV but doesn't seem to be Download Code

Replies are listed 'Best First'.
Re^2: This looks like whitespace in my CSV but doesn't seem to be by Tux (Canon) on Sep 30, 2012 at 18:00 UTC
Text:CSV_XS has a native builtin way to delete trailing and leading whitespace: `my $csv= text::CSV_XS->new ({ binary => 1, allow_whitespace => 1, auto +_diag => 1 });` [download] But that would not help in this case for two reasons It does not strip whitespace inside quotation, but only surrounding sep_char: `allow_whitespace When this option is set to true, whitespace (TAB's and SPAC +E's) surrounding the separation character is removed when parsin +g. If either TAB or SPACE is one of the three major characters "sep_char", "quote_char", or "escape_char" it will not be considered whitespace.` [download] Thee whitespace stripped is only space or TAB's, and not non-breaking Unicode space stuff Spreadsheet::Read however offers to strip leading and trailing whitespace from every field. I could extend that on request to allow it to strip Unicode whitespace too. `strip If set, "ReadData ()" will remove trailing- and/or leading- whitespace from every field. strip leading strailing ----- ------- --------- 0 n/a n/a 1 strip n/a 2 n/a strip 3 strip strip` [download] Enjoy, Have FUN! H.Merijn	[reply] [d/l] [select]
Re^3: This looks like whitespace in my CSV but doesn't seem to be by Marshall (Canon) on Oct 05, 2012 at 01:38 UTC
This sounds just fine. I haven't worked with any CSV files with leading spaces. That idea appears to be uncommon. But your suggestion sounds good.	[reply]
Re^2: This looks like whitespace in my CSV but doesn't seem to be by Anonymous Monk on Sep 30, 2012 at 09:47 UTC
See Re^2: This looks like whitespace in my CSV but doesn't seem to be	[reply]

In Section Seekers of Perl Wisdom