Ruby on Rails

On Sat, Oct 29, 2011 at 00:09, John Merlino <stoicism1@aol.com> wrote:

> ruby-1.9.2-p136 :095 > portfolio.each {|n, b| n <=> b }
> NoMethodError: undefined method `balance' for nil:NilClass
>
> It appears that the each iterator does not support passing in two
> arguments?

Correct. "each" means "apply this block to each of this collection's
elements in turn", not "... in parallel". Otherwise you'd have to
have the block accept exactly as many args as there are elements. (Or
of course accept a collection, in which case you're back to square
one.)

-Dave

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