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require 'highline'
cli = HighLine.new
# The parser
class ArrayOfNumbersFromString
def self.parse(string)
string.scan(/\d+/).map(&:to_i)
end
end
# The validator
class ArrayOfNumbersFromStringInRange
def self.in?(range)
new(range)
end
attr_reader :range
def initialize(range)
@range = range
end
def valid?(answer)
ary = ArrayOfNumbersFromString.parse(answer)
ary.all? ->(number) { range.include? number }
end
def inspect
"in range #@range validator"
end
end
answer = cli.ask("Which number? (0 or <Enter> to skip): ", ArrayOfNumbersFromString) { |q|
q.validate = ArrayOfNumbersFromStringInRange.in?(0..10)
q.default = 0
}
puts "Your answer was: #{answer} and it was correctly validated and coerced into an #{answer.class}"
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