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reply pragma <the_ignorator hotmail.com> writes:


I would like to write the following code in the according D style but i'm not
sure howto do it


void foo(IEnumerable<double[]> data)
{
  foreach (var d in data)
  {
    do_some_stuff(d);
  }
}

i guess the D equivalent to IEnumerable is Range? how would it look like in D?

greetings
Jan 24 2011
next sibling parent reply "Simen kjaeraas" <simen.kjaras gmail.com> writes:
pragma <the_ignorator hotmail.com> wrote:




 I would like to write the following code in the according D style but  
 i'm not
 sure howto do it


 void foo(IEnumerable<double[]> data)
 {
   foreach (var d in data)
   {
     do_some_stuff(d);
   }
 }

 i guess the D equivalent to IEnumerable is Range? how would it look like  
 in D?


void foo( R )( R data )
     if ( isInputRange!R && is( ElementType!R == double ) )
{
     foreach ( d; data ) {
         do_some_stuff( d );
     }
}

-- 
Simen
Jan 24 2011
next sibling parent reply Jesse Phillips <jessekphillips+D gmail.com> writes:
Simen kjaeraas Wrote:


 pragma <the_ignorator hotmail.com> wrote:
 



 I would like to write the following code in the according D style but  
 i'm not
 sure howto do it


 void foo(IEnumerable<double[]> data)
 {
   foreach (var d in data)
   {
     do_some_stuff(d);
   }
 }

 i guess the D equivalent to IEnumerable is Range? how would it look like  
 in D?


 
 void foo( R )( R data )
      if ( isInputRange!R && is( ElementType!R == double ) )
 {
      foreach ( d; data ) {
          do_some_stuff( d );
      }
 }
 
 -- 
 Simen


I thank it should be:  is( ElementType!R == double[] ) )
Jan 24 2011
parent "Simen kjaeraas" <simen.kjaras gmail.com> writes:
Jesse Phillips <jessekphillips+D gmail.com> wrote:


 Simen kjaeraas Wrote:


 pragma <the_ignorator hotmail.com> wrote:




 I would like to write the following code in the according D style but
 i'm not
 sure howto do it


 void foo(IEnumerable<double[]> data)
 {
   foreach (var d in data)
   {
     do_some_stuff(d);
   }
 }

 i guess the D equivalent to IEnumerable is Range? how would it look  


 like

 in D?


 void foo( R )( R data )
      if ( isInputRange!R && is( ElementType!R == double ) )
 {
      foreach ( d; data ) {
          do_some_stuff( d );
      }
 }

 --
 Simen


 I thank it should be:  is( ElementType!R == double[] ) )


True.

-- 
Simen
Jan 24 2011
prev sibling parent reply "Steven Schveighoffer" <schveiguy yahoo.com> writes:
On Mon, 24 Jan 2011 14:39:33 -0500, Simen kjaeraas  
<simen.kjaras gmail.com> wrote:


 pragma <the_ignorator hotmail.com> wrote:




 I would like to write the following code in the according D style but  
 i'm not
 sure howto do it


 void foo(IEnumerable<double[]> data)
 {
   foreach (var d in data)
   {
     do_some_stuff(d);
   }
 }

 i guess the D equivalent to IEnumerable is Range? how would it look  
 like in D?


 void foo( R )( R data )
      if ( isInputRange!R && is( ElementType!R == double ) )
 {
      foreach ( d; data ) {
          do_some_stuff( d );
      }
 }


Actually, isIterable would be more correct than isInputRange for this code  
example, not sure what the full code looks like.

http://www.digitalmars.com/d/2.0/phobos/std_traits.html#isIterable

-Steve
Jan 24 2011
parent reply Mandeep Singh Brar <mandeep brars.co.in> writes:
On Mon, 24 Jan 2011 14:39:33 -0500, Simen kjaeraas
<simen.kjaras gmail.com> wrote:


 pragma <the_ignorator hotmail.com> wrote:




 I would like to write the following code in the according D style but
 i'm not
 sure howto do it


 void foo(IEnumerable<double[]> data)
 {
   foreach (var d in data)
   {
     do_some_stuff(d);
   }
 }

 i guess the D equivalent to IEnumerable is Range? how would it look
 like in D?


 void foo( R )( R data )
      if ( isInputRange!R && is( ElementType!R == double ) )
 {
      foreach ( d; data ) {
          do_some_stuff( d );
      }
 }


Actually, isIterable would be more correct than isInputRange for this code
example, not sure what the full code looks like.

http://www.digitalmars.com/d/2.0/phobos/std_traits.html#isIterable

-Steve


How about simply saying:

void foo(double[] data)
{
   foreach (d; data)
   {
     do_some_stuff(d);
   }
}

all ranges are already foreachable.

Regards
Mandeep
Jan 25 2011
parent Jesse Phillips <jessekphillips+D gmail.com> writes:
Mandeep Singh Brar Wrote:


 How about simply saying:
 
 void foo(double[] data)
 {
    foreach (d; data)
    {
      do_some_stuff(d);
    }
 }
 
 all ranges are already foreachable.
 
 Regards
 Mandeep


He is iterating over a range/iterable of double[], Simen got the type check
wrong, which I pointed out.
Jan 25 2011
prev sibling parent reply Kagamin <spam here.lot> writes:
pragma Wrote:



 
 I would like to write the following code in the according D style but i'm not
 sure howto do it
 

 void foo(IEnumerable<double[]> data)
 {
   foreach (var d in data)
   {
     do_some_stuff(d);
   }
 }
 
 i guess the D equivalent to IEnumerable is Range? how would it look like in D?


Usually there's a little need for a range in such case. IEnumerable is usually
used because there's a high need for the List collection so it's used even more
often than arrays. Current druntime heap implementation already gives D arrays
Jan 26 2011
next sibling parent bearophile <bearophileHUGS lycos.com> writes:
Kagamin:



performance.


What do you mean? Do you mean regarding appends, iteration, or what?

Bye,
bearophile
Jan 26 2011
prev sibling parent Jesse Phillips <jessekphillips+D gmail.com> writes:
Kagamin Wrote:


 pragma Wrote:
 

 i guess the D equivalent to IEnumerable is Range? how would it look like in D?


 
 Usually there's a little need for a range in such case. IEnumerable is usually
used because there's a high need for the List collection so it's used even more
often than arrays. Current druntime heap implementation already gives D arrays



What? Of course there is a reason to use a Range/Iterable and has nothing to do
with performance. He could be getting his double[] from any number of functions
found in std.algorithm, most of whom return their own Range type.
Jan 26 2011