On Thu, Nov 13, 2003 at 12:09:24PM -0800, John W. Krahn wrote:
> Rob Dixon wrote:
> > For the subscribers who don't already know,
> > what are the differences between my
> >
> > print for 1..5
>
> for iterates over the list 1..5 and sets $_ with each value and then
> print is called for each item and print out the value in $_.
Not exactly -- it iterates over the *range*, and the range operator
doesn't need to generate a temporary list here.
print 1 .. $BIGNUM; # creates list of $BIGNUM scalars
print for 1 .. $BIGNUM; # creates/discards one scalar at a time
This is a documented optimization w/r/t foreach() loops, but the same
thing applies to the foreach() modifier.
--
Steve
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