[EMAIL PROTECTED] wrote:
> reducer does have no side effects so I suppose short-circuting it would
> be the best thing. I think the only thing about the last example is
> that it starts things off with a zero. I think that would boink it.
In that case, and assuming that fields contains at least one entry:
def collect(fields, reducer):
def rule(record):
f = iter(fields)
prev = record[f.next()]
for field in f:
if not reducer(prev, record[field]):
return False
prev = record[field]
return True
return rule
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