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annotate day1b.rb @ 35:ca54f9702892

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Day 24 part 2 instructions and partial solution
author IBBoard <dev@ibboard.co.uk>
date Thu, 18 Apr 2024 19:54:59 +0100
parents 76cc43966538
children
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0
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1 #! /usr/bin/env ruby
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2
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3 if ARGV.length != 1
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4 abort("Incorrect arguments - pass a single file")
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5 elsif not File.exist? (ARGV[0])
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6 abort ("File #{ARGV[0]} did not exist")
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7 end
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8
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9 file = ARGV[0]
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10 sum = 0
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11
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12 number_map = {
76cc43966538 Start https://adventofcode.com/2023/day/1 in Ruby
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13 "one" => 1,
76cc43966538 Start https://adventofcode.com/2023/day/1 in Ruby
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14 "two" => 2,
76cc43966538 Start https://adventofcode.com/2023/day/1 in Ruby
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15 "three" => 3,
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16 "four" => 4,
76cc43966538 Start https://adventofcode.com/2023/day/1 in Ruby
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17 "five" => 5,
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18 "six" => 6,
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19 "seven" => 7,
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20 "eight" => 8,
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21 "nine" => 9
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22 }
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23
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24 (1..9).each {|i| number_map[i.to_s] = i}
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25
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26 File.open(file, "r").each_line do |line|
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27 pos = line.length
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28 value_1 = 0
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29 number_map.each do |k,v|
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30 index = line.index(k)
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31 if index and index < pos
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32 value_1 = v
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33 pos = index
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34 end
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35 end
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36 pos = line.length
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37 line.reverse!
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38 value_2 = 0
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39 number_map.each do |k,v|
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40 index = line.index(k.reverse)
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41 if index and index < pos
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42 value_2 = v
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43 pos = index
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44 end
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45 end
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46 sum += (value_1 * 10) + value_2
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47 end
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48
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49 puts sum