On 28 Oct, 2012, at 8:01 PM, H Miersch <hmier...@me.com> wrote:
> then why does Xcode complain about an unused result? this is just another
> example of a TOTALLY USELESS error message.
>
> anyway, i fixed it, and now it works. thanks.
>
> On 28. Oct 2012, at 11:56, Roland King <r...@rols.org> wrote:
>
>>
>> On 28 Oct, 2012, at 7:50 PM, H Miersch <hmier...@me.com> wrote:
>>
>>> ok, it looks like i've sorted the original problem. but here's the next one:
>>>
>>> i have this line:
>>>
>>> for (i = 0; i++; i < count) {…}
>>>
>>> in the app delegate. Xcode keeps giving me this warning: expression result
>>> unused. WTF? that is correct syntax for a for loop, isn't it? so then why
>>> do i keep getting this warning?
>>> also, i have confirmed that the statements between { and } are NOT
>>> executed, no matter what. that's not right either. so WTF is going on here?
>>> _______________________________________________
>>
>>
>> no it's not even vaguely the right syntax for a for loop. You have
>>
>> for( initialiser, iterator, condition )
>>
>> it's supposed to be
>>
>> for( initialiser, condition, iterator )
>>
>> that's just basic C
>>
>> so change it to
>>
>> for( i = 0 ; i < count ; i++)
>>
>> Xcode is totally correct here.
>
because you are not using the result of i < count which was a hint that you had
made a mistake. So no that is not another TOTALLY USELESS error message, it's
actually a pretty good error message from the compiler which has no idea what
you've done but knows you have evaluated something and then not used the
answer. In the end it got you to ask the question "that is correct syntax for a
loop isn't it?" and it wasn't so I think you might cut the compiler a bit of
slack here.
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