ismorphic_strings.rb

# @param {String} s
# @param {String} t
# @return {Boolean}
def is_isomorphic(s, t)
  numeric_s = convert_to_numeric(s)
  numeric_t = convert_to_numeric(t)
  numeric_s == numeric_t
  # More explicit version
  # isomorphic = numeric_s == numeric_t
  # isomorphic
end

# def isomorphic?(numeric_s, numeric_t)
#   numeric_s == numeric_t
# end

def convert_to_numeric(str)
  map = {}
  counter = 1
  list = []
  str.each_char do |c|
    unless map.has_key?(c)
      map[c] = counter
      counter += 1
    end
    list << map[c]
  end
  list
end

# puts is_isomorphic("egg", "add")