readfile2.rb

# file content
#
# 4
# bar
# abracadabra
# bear
# bar
# baraxbara


File.readlines(file_name).map(&:chomp)
# outputs:  ["4", "bar", "abracadabra", "bear", "bar", "baraxbara"] 

File.readlines(file_name).map(&:chomp).join(' ')
# outputs "4 bar abracadabra bear bar baraxbara"

File.readlines(file_name).map(&:chomp).join
# outputs: "4barabracadabrabearbarbaraxbara"

File.readlines(file_name).map(&:chomp).map{|e| e.split}
# outputs: [["4"], ["bar"], ["abracadabra"], ["bear"], ["bar"], ["baraxbara"]]