File::Tie problem (newbie ?)

[cmic]

Hello

When I use 'abc' as the filename, it works. But if I use
'/home/cmic/abc', it throws
error : "Use of uninitialized value in print at a.pl line 8" and it
doesn't work.
NB Of course, abc has >100 valid lines !!

Anyone can explain ?

use warnings;
use Tie::File;

tie my @array, 'Tie::File', 'abc' || die $!;
print $array[3];

THX

 

[xhoster]

Hello

When I use 'abc' as the filename, it works. But if I use
'/home/cmic/abc', it throws
error : "Use of uninitialized value in print at a.pl line 8" and it
doesn't work.

Very mysterious. How can a 5-line program have an problem at line 8?

NB Of course, abc has >100 valid lines !!

How about /home/cmic/abc, does that also have >100 lines, valid or
otherwise?

Anyone can explain ?

use warnings;
use Tie::File;

tie my @array, 'Tie::File', 'abc' || die $!;
print $array[3];

THX

Xho

 

[cmic]

Hello

Oops. 'made a booboo.
The error was on line saying : print $array[n];

The problem happenned on a Redhat 9 (perl version ??)
However, I tried the same thing at home (Mandrake 10) and it seems to
work.
So I consider the problem closed, now.
Next time, I'll think twice

Thanks xhos....

 

[Eric Bohlman]

tie my @array, 'Tie::File', 'abc' || die $!;

This line doesn't do what you think it does. In particular, it will never
die.

 

[Gunnar Hjalmarsson]

This line doesn't do what you think it does. In particular, it will never
die.

Since you took the time to mention it, wouldn't it have been suitable to
explain _why_?

These are two ways to make the line behave as expected:

tie( my @array, 'Tie::File', 'abc' ) || die $!;

tie my @array, 'Tie::File', 'abc' or die $!;