On Fri, Oct 14, 2016 at 4:14 PM Gustavo Carneiro <gjcarne...@gmail.com> wrote:
> Sorry if I missed the boat, but only just now saw this PEP. > > Glancing through the PEP, I don't see mentioned anywhere the SQL > alternative of having a coalesce() function: > https://www.postgresql.org/docs/9.6/static/functions-conditional.html#FUNCTIONS-COALESCE-NVL-IFNULL > > In Python, something like this: > > def coalesce(*args): > for arg in args: > if arg is not None: > return arg > return None > > Just drop it into builtins, and voila. No need for lengthy discussions > about which operator to use because IMHO it needs no operator. > > Sure, it's not as sexy as a fancy new operator, nor as headline grabbing, > but it is pretty useful. > > This has the downside of not being short-circuit - arguments to the function are evaluated eagerly. Elazar
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