Lasse Vågsæther Karlsen wrote:
> I need to merge several sources of values into one stream of values. All
> of the sources are sorted already and I need to retrieve the values from
<snip>
Ok, after working through the various sources and solutions, here's what
I finally ended up with:
def merge_sorted(comparison, *sources):
iterables = []
for source in sources:
try:
source = iter(source)
iterables.append([source.next(), source])
except StopIteration:
pass
iterables.sort(cmp=comparison, key=lambda x: x[0])
while iterables:
yield iterables[0][0]
try:
iterables[0][0] = iterables[0][1].next()
if len(iterables) > 1 and comparison(iterables[0][0],
iterables[1][0]) > 0:
iterables.sort(comparison, key=lambda x: x[0])
except StopIteration:
iterables.pop(0)
Thanks to Mike and George for the solutions and pointers.
--
Lasse Vågsæther Karlsen
http://usinglvkblog.blogspot.com/
mailto:[EMAIL PROTECTED]
PGP KeyID: 0x2A42A1C2
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