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kyku/gist:388fe17a4896d56abc8407a53138db1b

Last active August 1, 2017 18:09
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nil check in crystal
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gistfile1.txt
require "option_parser"
value = nil
parser = OptionParser.parse! do |parser|
parser.on("--value VALUE", "mortgage value") {|v| value = v.to_u32}
end
if value
puts "non-nil-case"
puts value + 1
end
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