Juancarlo Añez writes:
> the_first_item_if_ordered = next(iter(container), default='not found')
Ouch!
> one_item_if_any = first(return_a_set(), default=-1)
Is "first" really the right color for this bikeshed? Maybe it's OK,
but speaking precisely you can't ask for "first" of a set. The
question is "will 'any one' do?" There may be a natural (pre)order on
the objects of a set, so that
first_item_if_any = first(sorted(return_a_set(), default=-1))
is the desired result. I'm not sure if this is occurs more than very
rarely in practice (but I know variations in iteration order for sets
across invocations has bitten me in testing). It would be nasty to
debug.
Steve
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