Ejecutar una función con un nombre dado || Run a function with a given name

funcs.js

"use strict";
function login(a, b) {
  console.log("login " + a + b);
}
function logout(a) {
  console.log("logout " + a);
}
function display(a) {
  console.log("display " + a);
}
var funcs = { login: login, logout: logout, display: display };
function run(a, b) {
  for (
    var h = 2, d = arguments.length, f = Array(h < d ? d - h : 0), g = h;
    g < d;
    g++
  )
    f[g - h] = arguments[g];
  a[b].apply(a, f);
}
run(funcs, "login", 10, 20), run(funcs, "logout", "the system"), run(funcs, "display", "the movie");