• deed (13/13) Dec 03 2012 How is a playing card's rank represented most elegantly in code?
• bearophile (8/9) Dec 03 2012 Maybe with an enum?
• deed (7/17) Dec 03 2012 Using enum Rank { J=11, Q, K, A } doesn't enable the function
• bearophile (6/10) Dec 03 2012 But it's strongly typed, so it's safere. It's my preferred

"deed" <none none.none> writes:

How is a playing card's rank represented most elegantly in code?

* Should be a customized uint/an own type representing uints in 
the range of 2 through 14.
* void foo(Rank rank) {  } // Accepts only the valid range
   foo(0);  // Error
   foo(2);  // Ok
   foo(10); // Ok

   alias J 11;
   alias Q 12;
   etc.,

   foo(J);  // Ok
   foo(Q);  // Ok
   foo(B);  // Error

"bearophile" <bearophileHUGS lycos.com> writes:

deed:

 How is a playing card's rank represented most elegantly in code?

Maybe with an enum?

enum Card { J, Q, ...}

If you have to store many of them then maybe giving them a size 
of one byte is better:

enum Card : ubyte { Ace, Two, ..., Q, ...}


Bye,
bearophile

"deed" <none none.none> writes:

On Monday, 3 December 2012 at 23:42:38 UTC, bearophile wrote:
 deed:

 How is a playing card's rank represented most elegantly in 
 code?

 Maybe with an enum?

 enum Card { J, Q, ...}

 If you have to store many of them then maybe giving them a size 
 of one byte is better:

 enum Card : ubyte { Ace, Two, ..., Q, ...}


 Bye,
 bearophile


Using enum Rank { J=11, Q, K, A } doesn't enable the function 
signature to be foo(Rank rank) when calling with 2, 3, .. 10, 
right?

And using enum Rank { two, three, four, ... , K, A } is not 
elegant.

I'd like to be able to call foo(Rank rank) with foo(3) and foo(Q).

"bearophile" <bearophileHUGS lycos.com> writes:

deed:

 And using enum Rank { two, three, four, ... , K, A } is not 
 elegant.

But it's strongly typed, so it's safere. It's my preferred 
solution for a problem like this.


 I'd like to be able to call foo(Rank rank) with foo(3) and 
 foo(Q).

Then use module level compile-time constant...

Bye,
bearophile