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Re: except (was: Keys with duplicates should be simple

Subject: Re: except (was: Keys with duplicates should be simple)
From: Ihe Onwuka <ihe.onwuka@xxxxxxxxx>
Date: Mon, 3 Feb 2014 06:20:06 +0000
Re:  except (was: Keys with duplicates should be simple
On Sun, Feb 2, 2014 at 9:04 PM, Michael Kay <mike@xxxxxxxxxxxx> wrote:
>
>>
>> So while I agree with you on the whole, I also make an exception for
>> 'except'. It just isn't that bad. Indeed, there is an entire
>> profession of people (I think they're called 'mathematicians') who
>> consider such verbal stunt work to be just a day at the office.
>>
>
> Indeed, I'm a little curious as to why "except" causes problems. I think we chose "except" rather than "difference" because "except" would be more meaningful to non-mathematicians.
>

Actually I can express this more concisely.

Because you have not stayed faithful to the syntax of the domain, the
concern is whether you have stayed faithful to the semantic. With
interesect and union no such concern arises.

 I don't want to have to read the spec to verify that except is in
fact a set difference operator so I'd just rather not use it.

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