From: Jason  Vogel <jasonvogel@...>
Date: 2006-12-07T02:20:07+09:00
Subject: Difference between nil? vs. (variable != nil)...

Source A :

if (@product_coverages != nil && @product_coverages.length > 0)
      @product_coverages = @product_coverages.each do
|product_coverage|
        product_coverage.external_description =
Coverage.find(product_coverage.coverage_id).external_description # test
        if (product_coverage.external_description != nil)
          product_coverage.external_description.capitalize!
        end
      end
    end

Source B :

if (@product_coverages != nil && @product_coverages.length > 0)
      @product_coverages = @product_coverages.each do
|product_coverage|
        product_coverage.external_description =
Coverage.find(product_coverage.coverage_id).external_description # test
        return "" if product_coverage.external_description.nil?
        product_coverage.external_description.capitalize!
      end
    end

I wanted to use Source B, but it return "" everytime.  But Source A
works.  I expected both of them to work.

Jason