Call by sharing example 1

sharingExample1.js

function test(a, b){
    a = { something : "this is something" };
    b.hello = "no greetings for you";
}

var firstArg = { hello : "hello world" };
var secondArg = { hello : "hello world" };

test(firstArg, secondArg);

console.log(firstArg, secondArg);

/*out put
{ hello: 'hello world' } 
{ hello: 'no greetings for you' }
*/