class UnboundMethod

Public Instance Methods

arguments() click to toggle source

Resolves the arguments of the method to have an identical signiture --useful for preserving arity.

class X
  def foo(a, b); end
  def bar(a, b=1); end
end

foo_method = X.instance_method(:foo)
foo_method.arguments   #=> "a0, a1"

bar_method = X.instance_method(:bar)
bar_method.arguments   #=> "a0, *args"

When defaults are used the arguments must end in "*args".

CREDIT: Trans

# File lib/core/facets/unboundmethod/arguments.rb, line 21
def arguments
  ar = arity
  case ar <=> 0
  when 1
    args = []
    ar.times do |i|
      args << "a#{i}"
    end
    args = args.join(", ")
  when 0
    args = ""
  else
    ar = -ar - 1
    args = []
    ar.times do |i|
      args << "a#{i}"
    end
    args << "*args"
    args = args.join(", ")
  end
  return args
end
name() click to toggle source

Return the name of the method.

Be aware that in ruby 1.9 #name is defined already, but it returns a Symbol not a String.

class X
  def foo; end
end

meth = X.instance_method(:foo)

meth.name  #=> "foo"

CREDIT: Trans

# File lib/core/facets/unboundmethod/name.rb, line 18
def name
  i = to_s.rindex('#')
  to_s.slice(i+1...-1)
end