Class: AocUtils

Inherits:
Object
  • Object
show all
Defined in:
lib/aoc_utils.rb

Overview

Desc: Utility functions for Advent of Code problems

Class Method Summary collapse

Class Method Details

.read_chars(filename) ⇒ Array<Array<String>>

extracts all characters from the specified file

Parameters:

  • filename (String) —

    the name of the file to read from

Returns:

  • (Array<Array<String>>) —

    an array of all the lines read from the file, with each line being an array of the characters read from that line with no leading or trailing whitespace



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# File 'lib/aoc_utils.rb', line 30

def self.read_chars(filename)
  chars = []
  File.open(filename).each_line do |line|
    chars << line.strip.chars
  end
  chars
end

.read_ints(filename, other_characters = []) ⇒ Array<Array<Integer>>

extracts all integers from the specified file

Parameters:

  • filename (String) —

    the name of the file to read from

  • other_characters (Array<String>) (defaults to: []) —

    will save the first non integer character in the line for further usage

Returns:

  • (Array<Array<Integer>>) —

    an array of all the lines read from the file, with each line being an array of the integers read from that line



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# File 'lib/aoc_utils.rb', line 7

def self.read_ints(filename, other_characters = [])
  ints = []
  File.open(filename).each_line do |line|
    ints << line.scan(/-?\d+/).map(&:to_i)
    other_characters << line[/[^0-9\s]/]
  end
  ints
end

.read_strings(filename) ⇒ Array<String>

extracts all strings from the specified file

Parameters:

  • filename (String) —

    the name of the file to read from

Returns:

  • (Array<String>) —

    an array of all the lines read from the file as strings with no leading or trailing whitespace



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# File 'lib/aoc_utils.rb', line 19

def self.read_strings(filename)
  strings = []
  File.open(filename).each_line do |line|
    strings << line.strip
  end
  strings
end

.read_two_parts(filename, datatype1, datatype2) ⇒ Array<Array>

extracts all lines from the specified file and splits them into two parts based on an empty line

Parameters:

  • filename (String) —

    the name of the file to read from

  • datatype1 (String) —

    the datatype of the first part of the file, either “Integer”, “String”, or “Char”

  • datatype2 (String) —

    the datatype of the second part of the file, either “Integer”, “String”, or “Char”

Returns:

  • (Array<Array>) —

    an array containing two arrays, the first being the first part of the file and the second being the second part of the file



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# File 'lib/aoc_utils.rb', line 43

def self.read_two_parts(filename, datatype1, datatype2)
  lines = File.open(filename).readlines.map(&:strip)
  index = lines.index("")
  part1 = lines[0...index]
  part2 = lines[(index + 1)..-1]
  case datatype1
  when "Integer"
    part1 = part1.map { |line| line.scan(/-?\d+/).map(&:to_i) }
  when "String"
    part1 = part1.map(&:strip)
  when "Char"
    part1 = part1.map(&:strip.chars)
  else
    raise "Invalid datatype"
  end
  case datatype2
  when "Integer"
    part2 = part2.map { |line| line.scan(/-?\d+/).map(&:to_i) }
  when "String"
    part2 = part2.map(&:strip)
  when "Char"
    part2 = part2.map(&:chars)
  end
  [part1, part2]
end