23 lines
363 B
Ruby
23 lines
363 B
Ruby
# frozen_string_literal: true
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require "stringio"
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def look_and_say(input)
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counter = 1
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output = input.each_char.map(&:to_i).chain([nil]).each_cons(2).reduce(StringIO.new) do |acc, (val1, val2)|
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if val1 == val2
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counter += 1
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else
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acc.write counter
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acc.write val1
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counter = 1
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end
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acc
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end
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output.rewind
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output
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end
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