preferring  or () in list of error codes?
steven at REMOVE.THIS.cybersource.com.au
Tue Jun 9 05:18:24 CEST 2009
On Tue, 09 Jun 2009 11:02:54 +1000, Ben Finney wrote:
> Carl Banks <pavlovevidence at gmail.com> writes:
>> If you want to go strictly by the book, I would say he ought to be
>> using a set since his collection of numbers has no meaningful order nor
>> does it make sense to list any item twice.
> Yes, a set would be best for this specific situation.
>> I don't think it's very important, however, to stick to rules like that
>> for objects that don't live for more than a single line of code.
> It's important to the extent that it's important to express one's
> *meaning*. Program code should be written primarily as a means of
> communicating with other programmers, and only incidentally for the
> computer to execute.
But practicality beats purity -- there are many scenarios where we make
compromises in our meaning in order to get correct, efficient code. E.g.
we use floats, despite them being a poor substitute for the abstract Real
numbers we mean.
In addition, using a tuple or a list in this context:
if e.message.code in (25401,25402,25408):
is so idiomatic, that using a set in it's place would be distracting.
Rather that efficiently communicating the programmer's intention, it
would raise in my mind the question "that's strange, why are they using a
set there instead of a tuple?".
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