ruby variable as same object (pointers?)

Question

>> a = 5
=> 5
>> b = a
=> 5
>> b = 4
=> 4
>> a
=> 5

how can I set \'b\' to actually be \'a\' so that in the exa

Answer 1

You can use arrays:

a = [5]
b = a
b[0] = 4
puts a[0]  #=>  4

This idea is based on this answer.