Having Fun With Unicode and String Literals

heredoc

puts <<THIS_IS_A_HEREDOC
  And this is the content of the heredoc.
  It's obviously multi-line.
  And it's great for creating help messages and things like that.
THIS_IS_A_HEREDOC

#=> And this is the content of the heredoc.
# It's obviously multi-line.
# And it's great for creating help messages and things like that.

heredoc_operations

<<DOWNCASE.upercase
  lowercase to uppercase
DOWNCASE

#=> "LOWERCASE TO UPPERCASE"

<<FIRST + <<SECOND
  One
FIRST
  Two
SECOND

#=> "  One\n  Two\n"

puts <<ORIGINAL.sub(<<MATCH, <<SUBSTITUTION)
  This is the original string.
  I would want to change this line.
  This is neat.
ORIGINAL
  I would want to change this line.
MATCH
  Modified by #sub.
SUBSTITUTION

#=>   This is the original string.
#     Modified by #sub.
#     This is neat.

smile

# encoding: UTF-8

😁 = 'smile'

<<LETS[0..-2] + 😁 + <<FACE
Let's put a 
LETS
 on that face
FACE

#=> "Let's put a smile on that face"

smile.rb

def 😁
  puts "Smile!"
end

😁 #=> Smile!

#Some Valid Method Names
# °
# +
# 😸
# -@
# ~

unicodes.rb

😸 = 'cat'
❄ = 'snowflake'
© = 'copyright'
7⃣ = 7
3⃣ = 3
 
7⃣ + 3⃣ #=> 10