Skip to content
Open
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
37 changes: 30 additions & 7 deletions practice.js
Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,14 @@
// 1) What is the purpose of the 'this keyword'?

//Answer

//The purpose of 'this keyword' is a contextual reference to an object.
// 2) What are the four rules that govern what the 'this keyword' is bound to and describe each?

//Answer

//Implicit binding occurs when dot notation is used to invoke a function.
//Explicit binding occurs when call, apply, or bind are used in a function
//new binding
//Default Binding
// 3) What does .bind do?

//Answer
Expand All @@ -20,22 +23,39 @@
//getUsername --> which is a function that returns the current object's username property. *Don't use 'user' instead use the 'this' keyword*

//Code Here

var user ={
username: 'fresh',
email: 'christian.frecia@boom.camp',
getUsername: function(){
return this.username;
}
}
//Now, invoke the getUsername method and verify you got the username of the object and not anything else.

user.getUsername();

//Next Problem


// Write a constructor function, including method definitions, which will make the following function invocations function properly.

//Function Invocations Here

function Car(make,model,year){
this.make = make;
this.model = model;
this.year = year;
this.move = 0;
}
var prius = new Car('Toyota', 'Prius', 2011);
var mustang = new Car('Ford', 'Mustang', 2013);

//Hint, you'll need to add a move property, with a starting value of zero, and write a moveCar function which will increment the move property by 10. The move property will be added to every object that is being returned from the Car function. You'll also need to use the 'this' keyword properly in order to make sure you're invoking moveCar on the right object (prius vs mustang).

Car.prototype.moveCar = function(){
this.move += 10;
return this.move;
}

prius.moveCar(); //increments prius' move property by 10. Returns the new move property.
mustang.moveCar(); //increments mustang' move property by 10. Returns the new move property.

Expand All @@ -54,7 +74,10 @@ var getYear = function(){

//Note(no tests)
//Code Here

var getPriusYear = getYear.bind(prius);
var getMustangYear = getYear.bind(mustang);
console.log(getPriusYear);
console.log(getMustangYear);


//New Problem
Expand All @@ -74,11 +97,11 @@ var userName = getMyUsername(); //Fix this
//Above you're given an object, and a function. What will the getMyUsername function return?
//Note(no tests)
//Answer Here

var userName = getMyUsername.bind(myUser)();
//In the example above, what is the 'this keyword' bound to when getMyUsername runs?

//Answer Here

//Global

//Fix the getMyUsername invocation (stored in the userName variable, at the bottom of the above code) so that userName will be equal to 'iliketurtles'.

4 changes: 2 additions & 2 deletions user.json
Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
{
"name": "",
"email": ""
"name": "Christian Ray Frecia",
"email": "christian.frecia@boom.camp"
}