Hi all,

As the subject, there's a way to easy to .dup and associative array?

Thanks

---
Paolo Invernizzi

"Paolo Invernizzi" <arathorn@NOSPAM_fastwebnet.it> wrote in message news:dvu0oj$qbo$1@digitaldaemon.com...
> Hi all,
>
> As the subject, there's a way to easy to .dup and associative array?
>
> Thanks

template dup(T)
{
 T dup(T aa)
 {
  auto keys = aa.keys;

  T aa2;

  foreach(key; keys)
   aa2[key] = aa[key];

  return aa2;
 }
}

void main()
{
 int[char[]] aa;
 aa["hello"] = 5;
 aa["fork"] = 10;

 int[char[]] aa2 = aa.dup();

 foreach(char[] key, int value; aa)
  writefln(key, ": ", value);

 writefln();

 foreach(char[] key, int value; aa2)
  writefln(key, ": ", value);
}

Try that on for size :)

Jarrett Billingsley wrote:

>>As the subject, there's a way to easy to .dup and associative array?
[...]
> Try that on for size :) 

tmp.d:9: no identifier for declarator key
Guess it requires DMD 0.148 or better...

--anders

"Anders F Björklund" <afb@algonet.se> wrote in message news:dvubug$19r4$1@digitaldaemon.com...
> Jarrett Billingsley wrote:
>
>>>As the subject, there's a way to easy to .dup and associative array?
> [...]
>> Try that on for size :)
>
> tmp.d:9: no identifier for declarator key
> Guess it requires DMD 0.148 or better...

Indeed it does, as it also requires IFTI.  SO I guess 0.149 is the minimum.

"Jarrett Billingsley" <kb3ctd2@yahoo.com> wrote in message news:dvuba7$196f$1@digitaldaemon.com...

Actually, this is simpler and may be faster (not sure):

template dup(T)
{
 T dup(T aa)
 {
  T aa2;

  foreach(key, value; aa)
   aa2[key] = value;

  return aa2;
 }
}

void main()
{
 int[char[]] aa;
 aa["hello"] = 5;
 aa["fork"] = 10;

 int[char[]] aa2 = aa.dup();

 foreach(char[] key, int value; aa)
  writefln(key, ": ", value);

 writefln();

 foreach(char[] key, int value; aa2)
  writefln(key, ": ", value);
}

In article <dvufh2$1e9l$1@digitaldaemon.com>, Jarrett Billingsley says...
>
>"Jarrett Billingsley" <kb3ctd2@yahoo.com> wrote in message news:dvuba7$196f$1@digitaldaemon.com...
>
>Actually, this is simpler and may be faster (not sure):
>
>template dup(T)
>{
> T dup(T aa)
> {
>  T aa2;
>
>  foreach(key, value; aa)
>   aa2[key] = value;
>
>  return aa2;
> }
>}

Its likely faster as you're not performing a lookup on 'aa' twice per loop.

- EricAnderton at yahoo