On Saturday, 1 August 2020 at 00:08:33 UTC, MoonlightSentinel
wrote:
On Friday, 31 July 2020 at 23:42:45 UTC, Andy Balba wrote:
How does one initialize c in D ?
ubyte[3][4] c = [ [5, 5, 5], [15, 15,15], [25, 25,25], [35,
35,35] ];
none of the statements below works
c = cast(ubyte) [ [5, 5, 5], [15, 15,15], [25, 25,25], [35,
35,35] ];
This is an invalid cast because it tries to coerce the entire
literal into an ubyte. Also it would be an assignment instead
of an initialization because this is independent of c's
declaration.
c[0] = ubyte[3] [5, 5, 5] ; c[1] = ubyte[3] [15, 15,15] ;
c[2] = ubyte[3] [25, 25,25] ; c[3] = ubyte[3] [35, 35,35] ;
A cast is usually specified as `cast(TargetType) value` but not
necesseray in this example. Use this instead:
c[0] = [5, 5, 5] ; c[1] = [15, 15,15] ;
c[2] = [25, 25,25] ; c[3] = [35, 35,35] ;
for (int i= 0; i<3; i++) for (int j= 0; i<4; j++) c[i][j]=
cast(ubyte)(10*i +j) ;
The array indices and the inner loop condition are wrong
for (int i= 0; i<3; i++) for (int j= 0; j<4; j++) c[j][i]=
cast(ubyte)(10*i +j) ;
You could also use foreach-loops, e.g.
foreach (j, ref line; c)
foreach (i, ref cell; line)
cell = cast(ubyte) (10 * i + j);
@ MoonlightSentinel: sorry about the typo in for (int i= 0; i<3;
i++) for (int j= 0; j<4; j++)
I'm a D newbie. moving over from C/C++, and I'm really finding it
hard to adjusting to D syntax, which I find somewhat cryptic
compared to C/C++.
After going thru a D on-line tutorial, I decided D was much
better than C/C++, so I began by journey into D by converting one
of my less complicated C++ apps.
I'm surprised at the enormous amount of time this D-conversion
has taken compared to GO conversion of the very same app.
Obviously, I need a faster way of climbing the D learning curve,
so I would appreciate any suggestions.
