2-way data bindings in MontageJS

gistfile1.js

var foo = {c: 3};
var bar = {a: {b: {c: 3}}};

// define a binding between foo.c and bar.a.b.c, so when we change the
// value of any of the two paths the new value will be copied to the
// other one.
Object.defineBinding(foo, "c", {
    boundObject: bar,
    boundObjectPropertyPath: "a.b.c"
});

console.log(foo.c); // outputs 3

bar.a.b.c = 6;
console.log(foo.c); // outputs 6

bar.a.b = {c: 12};
console.log(foo.c); // outputs 12

bar.a = {b: {c: 24}};
console.log(foo.c); // outputs 24

foo.c = 42;
console.log(bar.a.b.c); // since this is a 2-way binding, it outputs 42