please help find some article of the next behavior.
a = 'qwer'
a = b
b << 'ty'
puts b # => 'qwerty'
puts a # => 'qwerty'
but if
a = 'qwer'
a = b
b = 'ty'
puts b # => 'ty'
puts a # => 'qwer'
I know why in this case
I know that it works well, but I can not find an explanation - why so
P.S.
if applicable - please give the links to the articles on this subject (or similar Maybe i miss more interesting feature like this).
Thn.
When you do
a = b
you make variable a keep reference to the same object as variable b. That's why when you type:
b << 'ty'
string contained in variable a will also change - this is the same String instance.
On the other hand, let's say you have variable b containing reference to string 'qwer'.
If you have:
a = b
b = 'ty'
in first line you assign variable a to the same object as b. In the second line, you assign a new String object to variable b. So in the end both variables have references to different objects.
