From: redstun <redstun@...>
Date: 2011-01-23T23:31:23+09:00
Subject: Enumerable.inject_with_index?

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Enumerable.inject is pretty cool, but it treat the elements as if they have
the same weight when doing the calculation, in my case I need to apply a
different weight based on the index of each element, therefore I also need
the index being provided as one more block parameter.

enum.find_index might help, but I think there should be a more direct way to
get the index.

In short, like for enum.each_entry, there's each_with_index,
similarly, for enum.inject, is it possible to have enum.inject_with_index {
|memo, obj, index| ... } ?

Thanks

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