Ruby on Rails

John Merlino wrote in post #1029066:
> client code:
> ruby-1.9.2-p136 :095 > portfolio.each {|n, b| n <=> b }

You obviously aren't quite understanding what block actually are.

> NoMethodError: undefined method `balance' for nil:NilClass
Well yea. The block that gets passed into each was designed to take one
argument.

Each is a block (a.k.a closure, a.k.a lambda function, a.k.a anonymous
function) that has a design similar to any regular method or function,
for example:

def each(arg) do
# method body
end

If you were to pass two arguments to that method you'd have a similar
result:

self.each(a, b)
=> Results in something just as nasty.

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