Playing with ways to call map in Ruby.

manywaystoskinamap.rb

# Originally posted here: https://glot.io/snippets/es9vhlp4hs
# ©2017 Bob. No rights reserved.

def some_func(x)
  x + " sucks"
end

a = ["primus", "bob", "black hole"]

puts "\nthe most sane way"
puts a.map{ |x| some_func(x) }

puts "\nwhere is this going?"
puts a.map(&method(:some_func))

puts "\nleast sane: redefine it as a lamda"
some_func = method(:some_func)
puts a.map(&some_func)

puts "\nyeah, I guess you could do that..."
some_func = lambda { |x| x + " sucks" }
puts a.map(&some_func)

puts "\nok, sure... but the procs only use the first argument"
some_func = Proc.new { |x| x + " sucks" }
puts a.map(&some_func)

class String
  def some_func
    self + " sucks"
  end
end

puts "\nDON'T do this"
puts a.map(&:some_func)