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digitalmars.D.learn - How to init immutable static array?

reply Miguel L <mlabayru gmail.com> writes:
Hi, I need help again. I have an immutable static array and i 
need to initialize its contents inside a for loop. Something like 
this:

void f(int n)(....)
{
immutable float[n] my_array;
for(int i=0;i<n;++i)
   my_array[n]=some calculations(based on constants and n)

...

}

What is the better way to achieve this?
Thanks in advance.
Jul 18 2017
parent reply Era Scarecrow <rtcvb32 yahoo.com> writes:
On Tuesday, 18 July 2017 at 07:20:48 UTC, Miguel L wrote:

 Hi, I need help again. I have an immutable static array and i 
 need to initialize its contents inside a for loop. Something 
 like this:

 void f(int n)(....)
 {
 immutable float[n] my_array;
 for(int i=0;i<n;++i)
   my_array[n]=some calculations(based on constants and n)

 ...

 }


  I'd probably separate the calculations into a separate function, 
and assign the immutable data all at once (which you have to do 
similarly with constructors). So... i think this would work...

void f(int n)(....)
{
   auto static calculate() {
     float[n] tmp;
     for(int i=0;i<n;++i)
       my_array[i]=some calculations(based on constants and n)
     ...
     return cast(immutable) tmp;
   }

immutable float[n] my_array = calculate();
...
}
Jul 18 2017
parent reply Era Scarecrow <rtcvb32 yahoo.com> writes:
On Tuesday, 18 July 2017 at 07:30:30 UTC, Era Scarecrow wrote:

       my_array[i]=some calculations(based on constants and n)


i meant:     tmp[i]=some calculations(based on constants and n)
Jul 18 2017
parent Miguel L <mlabayru gmail.com> writes:
On Tuesday, 18 July 2017 at 07:31:22 UTC, Era Scarecrow wrote:

 On Tuesday, 18 July 2017 at 07:30:30 UTC, Era Scarecrow wrote:

       my_array[i]=some calculations(based on constants and n)


 i meant:     tmp[i]=some calculations(based on constants and n)


That does work, thanks.
Jul 18 2017