In Ruby, you can call Enumerable#any? on a enumerable object to see if any of its elements satisfies the predicate you pass in the block. Like so:
lst.any?{|e| pred(e) }
In Python, there's an any
function that does something similar, but on a list of booleans.
Of course, for a reasonably-sized list, I'd just do:
any(map(pred,lst))
However, if my list is very long, I don't want to have to do the entire map
operation first.
So, t开发者_开发技巧he question: Is there a generic short-circuiting any
function in Python?
Yes, I know it's really trivial to write one myself, but I'd like to use speedy builtin functions (and also not reinvent any wheels).
any(pred(x) for x in lst)
alternatively
from itertools import imap
any(imap(pred, lst))
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