On 25/07/18 23:11, Abe Dillon wrote:
The problem here is not whether it's explicit. It's about Readability and
conciseness. Using symbols in place of words almost always harms
readability in favor of conciseness.
value = person.name if person.name else person
ITYM
value = person.name if person.name is not None else None
almost reads like english (aside from being a weird and totally uncommon
use case)
I think Nicholas (?) was right to observe that it's uncommon to not want
to know where a deeply nested attribute access failed. Exactly what you
want to do when an underlying library (presumably) has "helpfully"
turned non-existent attributes into Nones is going to vary tremendously
from application to application.
On the other hand,
value = parameter ?? default
encapsulates a very common usage, and doesn't read badly compared with:
value = parameter if parameter is not None else default
which is a tad wordy. That example isn't too bad, but replace
"parameter" with "spam.spam.spam.eggs" and DRY suddenly becomes a rather
more important principle :-)
--
Rhodri James *-* Kynesim Ltd
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