Is there a functional way to do this?
I have an array [0,1,2,3,0,1,2,2,3] and I want the first chunk of
non-decreasing values from this array (eg: In this case I want
[0,1,2,3])
Sounds like a use for a generator wrapper:
def monotonic(iterator):
i = iter(iterator)
prev = i.next()
yield prev
while True:
this = i.next()
if prev <= this:
yield this
prev = this
else:
break
>>> lst1 = [0,1,2,3,0,1,2,2,3]
>>> lst2 = [0,1,2,3,3,0,1,2,2,3]
>>> print list(monotonic(lst1))
[0,1,2,3]
>>> print list(monotonic(lst2))
[0,1,2,3,3]
Adjust the "<=" to "<" depending on your needs (my "lst2"
condition probes that edge)
-tkc
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