Chris Angelico wrote:
def fac(n):
# attempt to get from a cache
return? cache[n]
# not in cache, calculate the value
ret=1 if n<=1 else fac(n-1)*n
# and cache and return it
cache[n]=ret; return ret
My idiom for fetching from a cache looks like this:
def get_from_cache(x):
y = cache.get(x)
if not y:
y = compute_from(x)
cache[x] = y
return y
which doesn't require any conditional returns.
--
Greg
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