AA strange behavior

[Carlos Santander]

Oskar Linde escribió:
> marc michel skrev:
>> I found a strange behavior using AAs :
> 
> [snip]
> 
>> foreach( char[]s, int[] i; aa ) {
>> aa.remove(s);
>> writefln("\"%s\" => removed ",s);
>> }
> 
> You may not delete aa elements within a foreach loop. The foreach 
> iterator will be confused.
> 
>> The only workaround is to add a "while( aa.length > 0 ) " surroundind the
>> foreach loop which does aa.remove().
> 
> There are other ways. For instance:
> 
> foreach(key;aa.keys)
>     aa.remove(key);
> 
> or faster (as you seem to want to delete all elements), but ugly, 
> hackish and undocumented:
> 
> struct BB { void *[] buckets; size_t nodes; }
> 
> ....
> 
> (cast(BB*)&aa).buckets = null;
> (cast(BB*)&aa).nodes = 0;
> 
> (A wish would be for the above to be implemented as aa.clear())
> 

I think this would be a useful addition to AAs. It has been proposed more than 
once, I don't know why Walter hasn't added it yet.

> Or if you just want to forget about your current aa instance:
> 
> aa = null;
> 
> /Oskar


-- 
Carlos Santander Bernal