7.2 Sniper Scope created by smillaraaq - https://repl.it/HHjY/13

7.2 Sniper Scope.js

var badGuys = function() {

  var bond = '007';

//does not get redefined and does know what bond is and its value
  (function oddJob() { 
    var AgentinScope = (bond === '007'); //true
    var prediction = 'Bond stays the same because it already exists and does not get redefined';
    console.log("Bond in OddJob's scope", AgentinScope, "because " + prediction);
  })();

//does not get redefined and does know what bond is and its value
//it exists but has not been assigned a value yet because it is an IIFE
  (function goldFinger(bond) { //<== this param makes it local to this function now
    console.log(bond); //bond=undefined
    var AgentinScope = (bond == '007') //false
    var prediction = 'Bond stays the same because it already exists and does not get redefined';
    console.log("Bond in Gold Finger's scope", AgentinScope, "because " + prediction);
  })(); //<== has no arg passed so bond is not defined. must be explicity passed.

//does not get redefined and does know what bond is and its value
  (function scaramanga(target) {
    var target = bond; //using the keyword var here will re-declare the target var. eventhough the target param in the parens already implicitly declares it with a var
    var AgentinScope = (bond == '007')
    var prediction = 'Bond stays the same because it already exists and does not get redefined';
    console.log("Bond in Scaramanga's scope", AgentinScope, "because " + prediction);
  })();

//redefines it and assigns a value and is not equal to 007
  (function drNo() {
    var bond = 'Body Double';
    var AgentinScope = (bond === '007');
    var prediction = 'Creates a new local variable that takes precedence over the global';
    console.log("Bond in  Dr. No's scope", AgentinScope,  "because " + prediction);
  })();

//agent will equal bond which equals body double, does not change the global bond
//agent will equal 007, local bond will equal body double, global bond does not change

  (function Jaws(agent) {
    console.log("Jaws", bond);
    var agent = bond;
    bond = 'Body Double'; //without the keyword var it made a change to the global var. it also changes the value for all the subsequent references
    console.log("Jaws", agent);
    var AgentinScope = (agent === '007');
    var prediction = 'two predictions';
    console.log("Bond in Jaws' scope", AgentinScope,  "because " + prediction);
  })();

//agent will equal bond which equals body double, does not change the global bond
//agent will equal 007, local bond will equal body double, global bond does not change
  
  (function elChiffre() {
    console.log("Chiff", bond);
    var agent = bond; console.log("Chiff", agent);
    bond = 'Body Double';
    console.log("Chiff", agent);
    var AgentinScope = (agent === '007');
    var prediction = 'two predictions';
    console.log("Bond in El Chiffre's scope", AgentinScope,  "because " + prediction);
  })();

}

// Run the function
badGuys()