On 10/24/2019 05:58 AM, lili wrote:
> Hi:
> In Dlang where is strange design. The in expression can only use to
> associative array, why array can not use in expression.
In addition to the big O surprise, there is another important issue that
may be seen as either for or against supporting the 'in' operator for
arrays: With associative arrays, 'in' takes the keys; since keys are
index values for arrays, the in operator would be trivially
return (key < __length
? &__ptr[key]
: null);
Given the two differences, 'in' does not make sense on arrays:
- Big O is different
- One wants to use keys for associative arrays but (likely) values for
arrays
Ali
