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Re: [TF-LIB] COALESCE is an unhelpful choice of name

From: Lee Feigenbaum <lee@thefigtrees.net>
Date: Fri, 13 Nov 2009 15:05:28 -0500
Message-ID: <4AFDBC08.2060300@thefigtrees.net>
To: Kjetil Kjernsmo <kjetil@kjernsmo.net>
CC: public-rdf-dawg@w3.org
Kjetil Kjernsmo wrote:
> On Friday 13. November 2009 14:01:31 Andy Seaborne wrote:
>> I don't find the name COALESCE very helpful.
> 
> I've been following the Semantics of SUM thread, since it looks like a 
> problem I've had, but I feel I haven't really grokked what COALESCE is 
> supposed to mean... So, I'll pose the stupid question: What is this suppose 
> to do?

COALESCE (or whatever it's called) takes 1 or more arguments and returns 
the first of its arguments that is bound to a value (i.e. first argument 
that is not unbound and not a type error).

Lee
Received on Friday, 13 November 2009 20:06:13 GMT

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