simplify-express-session-closure.js

function store() {}

function closure(obj) {
  store.print = function() {
    console.log(obj)
  }
  return function() {
    store.print()
  }
}

var c1 = closure({a: 1, b: 2})
c1()
var c2 = closure({a: 3, b: 4})
c2()
c1()

/**
 * the outout is
 * { a: 1, b: 2 }
 * { a: 3, b: 4 }
 * { a: 3, b: 4 }
 */

function Store() {}

function closure(obj) {
  var store = new Store();
  store.print = function() {
    console.log(obj)
  }
  return function() {
    store.print()
  }
}

var c1 = closure({a: 1, b: 2})
c1()
var c2 = closure({a: 3, b: 4})
c2()
c1()