On Sunday, 7 June 2015 at 19:05:16 UTC, Adam D. Ruppe wrote:
On Sunday, 7 June 2015 at 18:59:00 UTC, John Nixon wrote:
double[] pvi,int_1,int_2;
int_1=pvi_calc(centre);
int_2=pvi_calc(n-1-centre);//pvi_calc is changing int_1!
double[] pvi_calc(const int n1){
return pvi;}
These are the relevant lines: pvi_calc writes to a global array
(pvi) then returns it.
So the first two lines are just setting int_1 and int_2 both to
pvi, the same thing. So since they all reference the same
array, writing to any of them changes all of them.
You'll probably want to move double[] pvi to inside pvi_calc so
it becomes a new copy, or at least `return pvi.dup;` instead of
just `return pvi;`
Thank you for your concise reply. I had forgotten the distinction
between arrays and slices that is described in Ali Chehreli's
book Programming in D.
John Nixon
