readfile1.rb

  def readfile1(file_name)
    # read a file and returns string "17 10 16 3 7 "
    file = File.open(file_name)
    contents = file.read.gsub(/\r\n/, ' ')
  end

  def readfile2(file_nam)
    # same as above
    File.readlines(file_name).map(&:chomp).join(' ')
  end

  def readfile3(file_name)
    File.readlines(file_name).map(&:chomp) # ["17", "10", "16", "3", "7"]
    .join(' ') # "17 10 16 3 7"
  end

  # by using the above method by spliting gives each value
  def reafile3a(file_name)
    # read a file and map(&:chomp) will give a string
    # and gives 4 items,  hol, jap, math max_jap values etc.
    hol, jap, math, max_jap, max_math= File.readlines(file_name).map(&:chomp).join(' ').split(' ')
  end