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tbilous/task_p1_t1.rb

Created July 11, 2019 15:58
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part 1 task 1
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task_p1_t1.rb
#!/usr/bin/env ruby
# example: ruby task_p1_t1.rb 'abcdab987612'
require 'ostruct'
input_str = ARGV[0]
input_chars = input_str.chars
first_char = input_chars.shift
initial_state = OpenStruct.new(
out: [],
last_seen: first_char,
range_first_char: nil,
range_last_char: nil,
range_len: 1
)
res = input_chars.reduce(initial_state) do |state, current_char|
if (current_char.ord - state.last_seen.ord).abs == 1
state.range_len += 1
state.out.push(state.last_seen) unless state.range_first_char
state.range_first_char ||= state.last_seen
state.range_last_char = current_char
else
state.out.push('-') if state.range_len > 2
state.out.push(state.last_seen)
state.range_first_char = nil
state.range_last_char = nil
state.range_len = 1
end
state.last_seen = current_char
puts state
end
puts res.out.push(res.last_seen).join
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