Christian Renz wrote:
Now, I might be stupid, but I keep asking myself what you would need a
property for in this example.
Yes. It's important to remember that the shiny new hammer of properties
is not necessarily the appropriate tool to beat on *every* problem. :-)
Damian
Now, I might be stupid, but I keep asking myself what you would need a
property for in this example. To me, it totally confuses the
underlying structure. When was the last time you asked an integer to
identify itself as a valid credit card number?
It is _not_ a property of the integer that it is
On Sun, 5 Jan 2003, Murat Ünalan wrote:
> > Properties *can* be smart-matched:
> >
> > print "creditcard" if $var.prop().{CreditCard} ~~ 'VISA';
> > or:
> > print "creditcard" if $var.prop{CreditCard} ~~ 'VISA';
> > or:
> > print "creditcard" if $var.CreditCard ~~ 'VISA';
> >
> I think
> Why should you care? Perl 6 isn't going to be that strictly
> typed, is it?
Not even optional ?
Murat
> Properties *can* be smart-matched:
>
> print "creditcard" if $var.prop().{CreditCard} ~~ 'VISA';
> or:
> print "creditcard" if $var.prop{CreditCard} ~~ 'VISA';
> or:
> print "creditcard" if $var.CreditCard ~~ 'VISA';
>
> Damian
>
I think this is similar to "John Williams" su
Murat Ünalan wrote:
print "creditcard" if $var ~~ CreditCard( 'VISA' );
Brought to a point: Properties could be also smart matched.
Properties *can* be smart-matched:
print "creditcard" if $var.prop().{CreditCard} ~~ 'VISA';
or:
print "creditcard" if $var.prop{CreditCard} ~~ 'VISA';
or:
pr
On Sat, 4 Jan 2003, Murat Ünalan wrote:
>
> print "creditcard" if $var == CreditCard( 'VISA' );
>
> wich should do a mod10 on $var and then match a regex or something.
>
> I think one could say "CreditCard( 'VISA' )" is then the property. And
> after
> reading further seeing it could be smart matc
> my $var = 0;
> # or my $var = "0";
> # or my int $var = 0;
> # or my num $var = 0;
>
> # all 4 cases should print "is integer"
> print "is integer" if int $var == $var;
>
> This should work as a more generic method to test Integer
> *value*, rather than type, which IMHO is more useful (and
>
> > In the above case int($var) == $var returns true when I
> would want it
> > to return false.
>
> print "date" if $var.isa(int);
> print "date" if isa $var: int;
> print "date" if $var ~~ int;
>
> Those should all work. IMO the first reads the best. That
> will also work for C
> > It's also far slower. Constructing a 31-element list, junctionizing
> > it,
>
> This might well be done at compile-time. And/or, lazily. So
> the cost of these two steps is likely to be negligible.
>
> > then testing against each element vs. 2 numeric comparisons.
>
> Yes. That's a signifi
10 matches
Mail list logo
