Ruby Method Fun

ruby_methods.rb

# BEFORE RUBY 2.0
def method(argument,hash)
end

method 1, :foo => "bar", :baz => "qux"
method 1, {:foo => "bar", :baz => "qux"} #identical
method(1, {:foo => "bar", :baz => "qux"}) #identical


def method(v1=1,v2=2,v3=3)
end
method # v1=1, v2=2, v3=3
method 10 #v1=10, v2=2, v3=3
method 10, 20 #v1=10, v2=20, v3=3
method 10, 20, 30 #v1=10, v2=20, v3=30


# BEFORE RUBY 2.1
def method(a=1,b:2,c:3)
end

method # a=1, b=2, c=3
method 10 # a=10, b=2, c=3
method 10, b: 20 # a=10, b=20, c=3
method 10, b: 20, c: 30 # a=10, b=20, c=30
method 10, 20, 30 # ArgumentError


# SINCE RUBY 2.1

def method(a,b:,c:)
end

method # argument error
method 10 # argument error
method 10, b: 20 # argument error
method 10, b: 20, c: 30 # a=10, b=20, c=30