javascript - Function to modify object in arguments, not just a property -

i'm sure has exist somewhere haven't been able find it...

i'm trying write function takes object argument , updates reference. not property of reference, , not reassign object, update whole reference.

note pubsub in there demonstrate need asynchronicity , flexibility in types of objects passed in , updated.

best explained example:

//ideally how function work function watch(event, obj) {     pubsub.on(event, function(model) {         // want update entire object         // understand currently, reassigning         // know can obj.prop = model, that's not want         obj = model;     } };  //example usage var myobj = {"name" : "tom"}; watch("anevent", myobj); console.log(myobj.name); //still "tom"  // time passes, somewhere pubsub.trigger("anevent", {"name" : "john"})  console.log(myobj.name); // should read "john" 

is sort of scenario bind() method, e.g. $.bind() or currying useful, or using "this" in appropriate context?

it's not possible.

what confuses in js runtime don't have way manage actual reference values, can assign reference value variable.

that's - can "attach" reference given variable name, cannot modify reference value.

to clear said above: memory object allocated on initialization

var o = {}; 

after reference unnamed object (objects don't have names, variables do) assigned o variable. after cannot re-allocate object same place in memory.