On 8/16/17, Steve D'Aprano <steve+pyt...@pearwood.info> wrote: > Over in another thread, we've been talking about comprehensions and their > similarities and differences from the functional map() operation. > > Reminder: > > map(chr, [65, 66, 67, 68]) > > will return ['A', 'B', 'C']. > > My questions for those who know languages apart from Python: > > Are there language implementations which evaluate the result of map() (or > its > equivalent) in some order other than the obvious left-to-right first-to-last > sequential order? Is that order guaranteed by the language, or is it an > implementation detail?
Is it guaranteed in python? Or future version could implement map with something like subscriptability "propagation"? >>>range(1_000_000_000_000_000_000)[-1] 9999999999999999 >>> map(lambda a:a+1,range(1_000_000_000_000_000_000))[-1] TypeError: 'map' object is not subscriptable -- https://mail.python.org/mailman/listinfo/python-list
