Why this code is working

[Neeraj Kumar]

this code is a simplified version of the code I saw in Rails.

def speak(*types,&block)
block.call
end

# I can understand why this code is working
speak(23) { puts 'hi' }

# why this code is working ?. This code should fail because I am not
providing any # param to types. It means block is being passed as the
first param and that's not # good
speak { puts 'hi' }

 

[Justin Collins]

this code is a simplified version of the code I saw in Rails.

def speak(*types,&block)
block.call
end

# I can understand why this code is working
speak(23) { puts 'hi' }

# why this code is working ?. This code should fail because I am not
providing any # param to types. It means block is being passed as the
first param and that's not # good
speak { puts 'hi' }

*args means "zero or more parameters" which are then placed in an array
and passed into the method. The block is not being passed as the first
parameter.

-Justin