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mayra-cabrera/null_pattern_3.rb

Last active August 29, 2015 14:27
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null_pattern_3.rb
product_ids = [123,456,'',789]
products = product_ids.map{|id| Product.find(id)}
=> [#<Product:0x000123123 @name="TV"..>,
#<Product:0x000123124 @name="Cellphone"..>,
nil,
#<Product:0x000123125 @name="iPad"..>
]
products.each do |product|
if product.nil?
puts "no product"
else
puts product.name
end
end
# "TV"
# "Cellphone"
# "no product"
# "iPad"
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