On Thursday, 17 October 2013 at 18:00:20 UTC, Vitali wrote:
Why the array have to be reallocated after the length of a
slice is changed? It makes slices useless.
No, it doesn't. They are extremely helpful, particularly for
high-performance applications.
Here a little example (it fails):
void testSlices() {
int[] dArr = [10, 11, 12];
int[] dSlice = dArr[0..2];
dSlice.length++;
assert(dArr[2]==dSlice[2]); // failure
}
Of course it does. Increasing the length of an array causes the
new elements to be default-allocated by the language spec, and as
dArr and dSlice share the same memory, not reallocating dSlice
would clobber the third element of dArr.
