Signed word lengths and indexes

[Pelle]

On 06/15/2010 03:25 PM, Adam Ruppe wrote:
> On 6/15/10, Pelle<pelle.mansson at gmail.com>  wrote:
>> for (uint i = end - 1; i<  uint.max; --i)
>>
>> Same functionality, really clever.
>
> That's wrong rather than clever though.
>
> for(i<  length) is saying "continue as long as you are inside the
> array's bounds", which is exactly what you mean in that loop. The only
> "tricky" is the understanding that an array index is never negative,
> but this shouldn't require extra thought in the first place.

Using the length is meaningless, any uint >= length will work just as 
well. Using the length there is meaningless, since that's really not 
what you compare against.

Notice why clever tricks are bad? They generate meaningless discussions :)