Best search algorithm to find condition within a range
Steven D'Aprano
steve+comp.lang.python at pearwood.info
Thu Apr 9 11:21:46 EDT 2015
On Fri, 10 Apr 2015 01:02 am, Chris Angelico wrote:
> On Fri, Apr 10, 2015 at 12:53 AM, Alain Ketterlin
> <alain at dpt-info.u-strasbg.fr> wrote:
>> Ouch, you're right, I tried to stick with Marko's example and forgot the
>> basics. I meant "signed ints", but the "removable" condition should be
>> something like:
>>
>> if ( x>0 && y>0 && z<x )
>> ...
>>
>> i.e., some condition that is never true (either false or undefined).
>> Thanks for the correction.
>
> Ah, yep. And yes, that's absolutely right - the compiler's allowed to
> treat that as never true.
Am I missing something? Did you over-trim the quoting?
How can the compiler possibly be allowed to treat x>0 && y>0 && z<x as
always false?
x = y = 1
z = 0
gives x>0 && y>0 && z<x as true.
--
Steven
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