Confirmation of string behavior as an argument in JavaScript

Question

Please can someone confirm the following assertions about the code below?

the contents (i.e. the string it is pointing to) of str will not be copied when it is passed as an argument into f
that parameter p, created in the execution context instantiated for the call to f is a value which is a reference to the memory containing the interned value "foo" (hence no copy occurred)

that String#slice does not copy p

var str = 'foo';
function f(p) {
  return p.slice(2); // creates a new string with "o" as the contents
}
f(str);

Possible duplicate of [Pass Variables by Reference in Javascript](http://stackoverflow.com/questions/7744611/pass-variables-by-reference-in-javascript) — Alex Slipknot, Apr 27 '17 at 09:28
Strings are basically immutable, and the copy in underlying implementation differs across engines. — Tatsuyuki Ishi, Apr 27 '17 at 09:30
Also this answer can help you: http://stackoverflow.com/questions/13104494/does-javascript-pass-by-reference — Alex Slipknot, Apr 27 '17 at 09:31

score 0 · Accepted Answer · edited Jun 20 '20 at 09:12

0

I confirm.

P.S.: is it really all you needed?

edited Jun 20 '20 at 09:12

Community

answered Apr 27 '17 at 09:50

Mycolaos

you should provide some details on why you confirm this, including references, examples and/or explanations – thedude Apr 27 '17 at 09:53