On 04/22/2012 11:47 PM, SomeDude wrote:
Sorry for the noob questions, but
import std.stdio;
struct Foo {
int x;
}
void main() {
auto array = new Foo[10];
auto i = array.length;
foreach(Foo f; array) { f.x = --i; write(f.x);}
Use ref when you want to modify the original array, without ref you are
modifying a copy in the foreach.
foreach(ref Foo f; array) { f.x = --i; write(f.x);}
writeln();
foreach(Foo f; array) { write(f.x);}
}
gives me:
PS E:\DigitalMars\dmd2\samples> rdmd bug.d
9876543210
0000000000
Also,
void main() {
auto array = new Foo[10];
--> for(int i = array.length; i > 1; i--) { array[i].x = i; }
writeln();
foreach(Foo f; array) { write(f.x);}
}
throws core.exception.RangeError@bug(8): Range violation on the line
with the arrow.
What am I doing wrong ?
You set i to the array length of 10 but the array index is zero based so
the last item in the array is at index 9.
But in the first iteration of the loop you are trying to access the the
item at index 10 (array.length) which doesn't exist.
--
Mike Wey
