generators in Java?
ramen at lackingtalent.com
Mon Jan 2 13:49:12 EST 2006
On Fri, 30 Dec 2005, Tom Sheffler wrote:
> Does Java have generators? I am aware of the "Iterator" interface,
> but it seems much more restrictive. Python generators are useful
> for many more things than simply list enumeration, but the Java
> Iterator seems limited.
What makes you think that Java's Iterators are more restrictive or
limited? As far as I understand, Java's hasNext/next protocol is
essentially the same as Python's next/StopIteration protocol. The main
advantage of the use of generators is that, when converting from a
callback-style or non-streaming function to one that produces values
on-demand, you don't have to rewrite your function to save intermediate
states (which can be a considerable amount of work).
A good explanation of the rationale for generators in Python is in the
"Motivation" section of PEP 255:
.:[ dave benjamin: ramen/[spoomusic.com] ]:.
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