What is the name of the += method for hash?

Question

I want to rewrite this:

my_hash['a'] += 5

in something like this:

my_hash. send (:[]+=, 'a', 5)

but :[]+= isn't working.

Is there a way to do this?

Answer 1

How about:

my_array.send(:[]=, 'a', my_array['a'] + 5)

Answer 2

That's syntactic sugar for:

my_array['a'] = my_array['a'] + 5

So the method is + on the element (not the array), and [] and []= on the array itself. (Or more precisely here, on the hash.)