Ruby require argument keyword

#programming #ruby #beginners #codenewbie

Working with Ruby there are times you want a method to have required arguments without chaining multiple if else statements

A simpler and easy way to handle required arguments is,


# define a method with named arguments like this results in an 
# error when name is not provided

def greetGuest(name:)
  puts "Welcome #{name}!"
end

# invoking method without name will throw ArgumentError
greetGuest # ArgumentError: missing keyword: name


greetGuest(name: "Salley" ) # Welcome Salley!

And even better you can have default arguments like:


def greetGuest(name: "Anonymous Guest")
  puts "Welcome #{name}!"
end

# invoking method without name will use the default argument
greetGuest # Welcome Anonymous Guest!