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Papierkorb/nil.cr Secret

Created August 1, 2017 18:16
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nil.cr
require "option_parser"
value = nil
parser = OptionParser.parse! do |parser|
parser.on("--value VALUE", "mortgage value") {|v| value = v.to_u32}
end
if v = value ### <---
puts "non-nil-case"
puts v + 1
end
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