Re: Access elements of $

This doesn't find the second row in the file.

Which file: the one accessed by the file handle MYFILE or by the DMPLD handle?

Maybe try writing a program which opens a file, reads and prints each line in a while loop, and then closes the file. This might be a good foundation for your ultimate goal.

As moritz suggested, you might then want to try splitting each line as you go through the while loop to access its fields.

[H]ow do I reference the first element of $_ ...

$_ is a scalar; it has no elements. It may be a scalar that is a reference to an array, in which case $_->[0], $_->[1], ... would access the first, second, etc., elements of the array.

Comment on Re: Access elements of $_ Select or Download Code

Replies are listed 'Best First'.
Re^2: Access elements of $_ by Anonymous Monk on Aug 12, 2010 at 12:55 UTC
Actually, I just did this to fix it following an earlier suggestion `$id = 1 open(MYFILE,"/var/tmp/mylist.dat") or die "Cant open mylist.dat" while (<MYFILE>) { chomp; split/,/; die "Request Id $id already present in file\n" if $_[0] eq $id; } close MYFILE;` [download]	[reply] [d/l]

Replies are listed 'Best First'.

Re^2: Access elements of $_
by Anonymous Monk on Aug 12, 2010 at 12:55 UTC

$id = 1
open(MYFILE,"/var/tmp/mylist.dat") or die "Cant open mylist.dat"

while (<MYFILE>) {
      chomp;
      split/,/;
      die "Request Id $id already present in file\n" if $_[0] eq $id;
                }

close MYFILE;
[download]

[reply]
[d/l]