Balaji,
next time when you reply please send it reply to the whole group, don't just
sent it to myself. this gives the others a chance to help you.
On Thursday 12 February 2004 20:05, you wrote:
> Hi David,
>
> Thanks for your answer. It is working but I dont know what
> the dot operator signifies. I would appreciate if you could explain it
> or refer me to any documentation.
[snip]
> >
> > I would like to know the length of the anonymous array containing some
> > elements.
>
> the usual trick use be used:
>
> #!/usr/bin/perl -w
> use strict;
>
> my $h = {array => [1,3,5,7]};
>
> print @{$h->{array}} . "\n";
> print $#{$h->{array}} . "\n";
>
the dot operator does 2 things in this example:
1. it concatenates the two operants and creates a string out of them.
2. it forces both operants to be in scalar context.
the second point is important, consider:
print @{$h->{array}},"\n";
print $#{$h->{array}},"\n";
without the dot operator, it prints:
1357
3
because @{$h->{array}} is taken in list context by the 'print' function.
david
--
sub'_{print"@_ ";* \ = * __ ,\ & \}
sub'__{print"@_ ";* \ = * ___ ,\ & \}
sub'___{print"@_ ";* \ = * ____ ,\ & \}
sub'____{print"@_,\n"}&{_+Just}(another)->(Perl)->(Hacker)
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
<http://learn.perl.org/> <http://learn.perl.org/first-response>
