[u02sgb]

I would argue that Javascript is a hybrid of pass by reference because of the case below though.

    function someFunc(v) {
      v.myvar = 456;
      v = someOtherObject;
    }

    var foo = someObject;
    foo.myvar = 123;
    someFunc(foo);
    // foo still refers to someObject
    // foo.myvar is 456

Banning our team from passing objects around except in specific, discussed, cases got rid of lots of difficult to track down bugs.

[asiachick]

You'd be wrong. Again "Pass by reference" is "well defined" in computer languages.

Passing a reference to an object is not "pass by reference". Your example works the same in Java and C# and probably Swift and many other languages. But you aren't "passing by reference". "pass by reference" specifically means passing a reference to the variable, not the variable's value. Javascript always passes the value of the variable, it has no ability to pass a variable by reference.