javascript how to create reference

Question

Could you propose any workarounds to implement a reference to variable using closures or any other tricks?

createReference = function() {
    // TODO: how to         


        

Answer 1

Only non-scalar types can be passed as reference, and will always be passed as reference:

var reference = {};
my_function(reference);
console.log(reference); // will show property - a property value

function my_function(my_reference) {
    my_reference.property = "a property value";
}

var not_a_reference = [];
my_function(not_a_reference);
console.log(not_a_reference); // will NOT show 'a value'

function my_function() {
    my_reference.push("a value");
}

Closer to your example:

function show(value) {
    alert(value.data);
}

var value = { 'data': 5 };
show(value); // alerts 5
value.data = 6;
show(value); // alerts 6