Confused...in the book page 88-89 you make reference to passing references is actually being passed by value; however, the code that is used to prove this does not make since to me. Inside the function setName(obj) you are creating a new Object reference, which in other languages would say this is a local variable and will die at the end of the function, thus not reflecting a change on the Object created outside the function. Here is a couple of examples:
HTML Code:
var person = new Object();
person.name = 'John';
console.log(person.name);
function changeName(obj){
obj = new Object();
obj.name = 'Nick';
return obj.name;
}
console.log(changeName(person));
console.log(person.name);
This example produces:
John, Nick, John
HTML Code:
var person = new Object();
person.name = 'John Doe';
console.log(person.name);
function changeName(obj){
// obj = new Object(); comment out
obj.name = 'Nick';
return obj.name;
}
console.log(changeName(person));
console.log(person.name);
This example, commenting out the creation of a new Object inside the function, produces:
John, Nick, Nick
Which suggest to me that it was in fact passed by reference and not by value.
Any further clarity on this would be appreciated.
Regards,
Darren
book related questions here
on their post!
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