I'm thinking about how to explain Perl 6's numbers to the beginners
just picking up Learning Perl 6. I had some questions about NaN and Inf
(which I can't just try since neither Parrot or Pugs appear to know
about these yet).
* In S02's table of Immutable types, it mentions that Int allows Inf
brian d foy wrote:
* If I can match $x to NaN (or its stand-in), what happens when $x is
undef?
undef is a property of the container variable (that it holds no value),
whereas NaN is a property of the content (like 1/0). so undef ~~ NaN
should be false IMHO.
There's a note about this in S02
In article [EMAIL PROTECTED], brian d foy
[EMAIL PROTECTED] wrote:
I'm thinking about how to explain Perl 6's numbers to the beginners
just picking up Learning Perl 6. I had some questions about NaN and Inf
(which I can't just try since neither Parrot or Pugs appear to know
about these yet).
This is basically the same question I had about file test operators
earlier
(http://www.nntp.perl.org/group/perl.perl6.language/2007/04/msg27415.htm
l). I never got an answer on my syntax question and the discussion went
off to talk about file tests instead of pair notation.
From S02 The general
At 3:20 PM -0500 10/6/07, brian d foy wrote:
For comparisons, how are we going to use Inf and NaN? Are those going
to be special flyweight objects, so:
$x = 1 / 0;
$x == Inf;# is it the same value
$x === Inf; # it is always the same object
Be mindful of the difference
