Question

The following Ruby code

def a(b,c) b+c end 

is the same as follows with Python

def a(b,c): return b+c

It looks like that ruby has the special storage(stack or something) that stores the final evaluation result and returns the value when a function is called.

• If so, what’s the name of the stack, and how can I get that stack?
• If not, how does the Ruby code work without returning something?

Answer 1

It’s not that magic, Ruby just returns the value returned by the operation that does at the end.

It’s synctactic sugar that it’s implemented just at parsing level: a statement that calculates something implicitly returns itself without any keyword..

to clarify it a little bit you can imagine both abstract syntax trees of the two snippets: they won’t be different.