Finding the insertion point in a list

7stud bbxx789_05ss at yahoo.com
Sun Mar 18 18:15:42 CET 2007


On Mar 18, 2:23 am, Paul Rubin <http://phr...@NOSPAM.invalid> wrote:
> Steve Holden <s... at holdenweb.com> writes:
> > >    max(i for i,t in enumerate(x) if t <= y)
> > > Those are actually pretty direct.
>
> > How about a solution (like the bisect one suggested almost as soon as
> > this thread started) that doesn't iterate over the whole list.
>
> Here's a Haskell-inspired one:
>
>     len(list(itertools.takewhile(lambda t: y > t, x)))
>

Can you explain how list() works in that statement.  I looked up
takewhile() and it returns an iterator that will automatically stop at
the insertion point?  So does list() do an internal comprehension with
the iterator?




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