On 2021-05-27 12:33, Chris Angelico wrote:
With statics, you could write it like this:
def merge_shortest(things):
static len=len
...
Simple. Easy. Reliable. (And this usage would work with pretty much
any of the defined semantics.) There's no more confusion.
You can already do that:
def merge_shortest(things):
len=len
...
Yes, it does require a single global lookup on each function call, but
if that's really a bottleneck for you I don't think there's much hope. :-)
Even something like a way of specifying constants (which has been
proposed in another thread) would be better to my eye. That would let
certain variables be marked as "safe" so that they could always be
looked up fast because we'd be sure they're never going to change.
Question: When does this constant get looked up?
def merge_shortest(things):
constant len=len
...
Is it looked up as the function begins execution, or when the function
is defined? How much are you going to assume that it won't change?
Sorry, I was a bit vague there. What I was envisioning is that you
would specify len as a constant at the GLOBAL level, meaning that all
functions in the module could always assume it referred to the same
thing. (It's true this might require something different from what was
proposed in the other thread about constants.)
--
Brendan Barnwell
"Do not follow where the path may lead. Go, instead, where there is no
path, and leave a trail."
--author unknown
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