From: Fernando Perez <pedrolito@...>
Date: 2008-05-16T01:26:24+09:00
Subject: Contionnal sum

Hi,

I am wondering if it is possible to create a conditionnal sum.

For instance I would like to do something like this:

@total_amount = @orders.sum { |order| order.amount if order.paid == true
}
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