Chaining & to_proc on symbol

Question

It\'s well known to Rubyist & will call to_proc on a symbol, so

[:a, :b, :c].map(&:to_s)

is equivalent to

Answer 1

While we're playing with syntax, how about monkey-patching Array with a to_proc method?

class Array
  def to_proc
    return :itself.to_proc if empty?
    ->(obj) { drop(1).to_proc.call(first.to_proc.call(obj)) }
  end
end

["foo", "bar", "baz"].map(&[:capitalize, :swapcase, :chars, ->a{ a.join("-") }])
# => ["f-O-O", "b-A-R", "b-A-Z"]

See it on repl.it: https://repl.it/JS4B/1