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Postings from January 2001
On Sun, Jan 07, 2001 at 08:56:32PM +0000, Ton Hospel wrote:
> > Fair enough. Try this:
> > I am returning a value from a subroutine.
> > The value I am returning is the value of the first parameter.
> > The value of first parameter of the subroutine is modifiable.
> > The value that I am returning is modifiable.
> >
> > Where's the fallacy?
>
> You are returning a COPY of the value of the first parameter.
Not so! shift does not make a copy:
% perl -le '$a= 1; print \$a;foo($a);sub foo { print \do { shift}} '
SCALAR(0x80fa19c)
SCALAR(0x80fa19c)
Remember that we are passing around *values stored in variables*.
--
I used to be disgusted, now I find I'm just amused.
-- Elvis Costello
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