What do the different brackets in Ruby mean?

Question

In Ruby, what\'s the difference between {} and []?

{} seems to be used for both code blocks and hashes.

Are []

Answer 1

Note that you can define the [] method for your own classes:

class A
 def [](position)
   # do something
 end

 def @rank.[]= key, val
    # define the instance[a] = b method
 end

end