Rename the proposal to ireverse().

This commit is contained in:
Raymond Hettinger 2003-09-26 16:09:54 +00:00
parent c0b44583ab
commit 34893b2b2a
1 changed files with 6 additions and 6 deletions

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@ -46,15 +46,15 @@ does arise regularly in practice. See `Real World Use Cases`_ below.
Proposal
========
Add a method called *iter_backwards()* to sequence objects that can
Add a method called *ireverse()* to sequence objects that can
benefit from it. The above examples then simplify to::
for i in xrange(n).iter_backwards():
for i in xrange(n).ireverse():
print seqn[i]
::
for elem in seqn.iter_backwards():
for elem in seqn.ireverse():
print elem
The new protocol would be applied to lists, strings, xrange objects,
@ -104,7 +104,7 @@ library and comments on why reverse iteration was necessary:
form is readable and clean; however, it would be slightly faster
and clearer with::
for func, target, kargs in _exithandlers.iter_backwards():
for func, target, kargs in _exithandlers.ireverse():
. . .
del _exithandlers
@ -131,7 +131,7 @@ library and comments on why reverse iteration was necessary:
The proposed form is much easier to construct and verify::
result.sort()
return [x for score, x in result[-n:].iter_backwards()]
return [x for score, x in result[-n:].ireverse()]
* heapq.heapify() uses ``for i in xrange(n//2 - 1, -1, -1)`` because
higher-level orderings are more easily formed from pairs of
@ -158,7 +158,7 @@ library and comments on why reverse iteration was necessary:
elements from an ever diminishing pool. In fact, the algorithm can
be run in a forward direction but is less intuitive and rarely
presented that way in literature. The replacement code
``for i in xrange(1, len(x)).iter_backwards()`` is much easier
``for i in xrange(1, len(x)).ireverse()`` is much easier
to mentally verify.
* rfc822.Message.__delitem__() uses::