Re^4: howto strip the first char of a string?

And, amazingly... it completely works!

package Tie::ReverseScalar;

sub TIESCALAR {
    my $class = shift;
    return bless \$_[0] => $class;
}

sub FETCH {
    return reverse ${$_[0]};
}

sub STORE {
    ${$_[0]} = reverse $_[1];
}

sub DESTROY {
    undef ${$_[0]};
}

1;
[download]

and then:

use Tie::ReverseScalar;
sub Reverse :lvalue { 
    my $x = @_ ? \$_[0] : \$_;
    tie $x, 'Tie::ReverseScalar', $$x; $x
}

$_ = 'foo';
chop Reverse;
print;

__END__
oo
[download]

Now, of course, that's not the way that reverse actually works... but isn't that fun?

Update: oops, I had written that this output "fo" (which wouldn't have been interesting at all), but it actually outputs "oo" (which is what makes it cool). Thanks, BrowserUK, for pointing out the typo.

------------
:Wq
Not an editor command: Wq
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Comment on Re^4: howto strip the first char of a string? Select or Download Code

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Re^5: howto strip the first char of a string? by BrowserUk (Patriarch) on Sep 08, 2004 at 20:32 UTC
Colour me confused but isn't: `$_ = 'foo'; chop Reverse; print; __END__ fo` [download] a complicated way of doing?: `$_ = 'foo'; chop; print; fo` [download] Examine what is said, not who speaks. "Efficiency is intelligent laziness." -David Dunham "Think for yourself!" - Abigail "Memory, processor, disk in that order on the hardware side. Algorithm, algorithm, algorithm on the code side." - tachyon	[reply] [d/l] [select]

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Re^5: howto strip the first char of a string?
by BrowserUk (Patriarch) on Sep 08, 2004 at 20:32 UTC

Colour me confused but isn't:

$_ = 'foo';
chop Reverse;
print;

__END__
fo
[download]

a complicated way of doing?:

$_ = 'foo'; chop; print;

fo
[download]

Examine what is said, not who speaks.

"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
"Memory, processor, disk in that order on the hardware side. Algorithm, algorithm, algorithm on the code side." - tachyon

[reply]
[d/l]
[select]