Hot answers tagged

5 votes
Accepted

What does it mean "Your project must have at least three scripts total"?

according to http://wiki.scratch.mit.edu/wiki/Script: A script is a collection or stack of blocks that all interlock with one another. The blocks and their order are very important, as they ...
4 votes
Accepted

Problem set 0, need to fill up requirements

Hi @user1406 and welcome to the CS50 community. Here you go, In order to declare a new variable, in the variables palette, click "Make a Variable". A box will appear. Type the name of the variable ...
user avatar
  • 1,146
3 votes
Accepted

Problems with clones sensing "touching" in Scratch

What you are seeing is subtle problem called a 'race condition' which is encountered quite often in programming, especially in asynchronous programs like yours. At the moment your program is designed ...
user avatar
  • 2,625
3 votes

problem set-0 submitted but no notification about successful submission in the gradebook?

PSet0 just shows like that. It sounds like everything is ok with your submission. Check back again in 2 weeks and if you don't have a grade you will know there was an issue. If you see the picture ...
user avatar
  • 1,317
3 votes
Accepted

Will I still use the Scratch in PSet 1, 2 and so on?

Scratch is only used for pset0 and next week, you'll be moving onto the C language and Scratch will no longer be mentioned. You really should complete it before submitting, so perhaps something ...
user avatar
  • 18.4k
3 votes
Accepted

pset0 - sprite movement problems

In your're script window, when the Scratch game is running, you can actually see what script is running. From this, you can see that the Dragon is not moving to the original position because "when I ...
user avatar
3 votes

Complex Scratch Scrips

I think the course defines itself as "introduction to the intellectual enterprises of computer science and the art of programming." It is indeed an art, there are people with an enormous talent for it,...
user avatar
  • 5,172
2 votes

Where can I find comments on my projects

Problem sets are graded on a scale of 0 to 1 (0 to 100%), based on the number of checks vs the number you passed. You need at least 0.6 (60%) on each pset in order to qualify for the certificate. ...
user avatar
  • 18.4k
2 votes

Pset0 Cant figure out some bug

Yes, both are working fine. Don't worry.
user avatar
2 votes

Working on PSet0

You probably may browse some projects on Scratch to get inspired. Here are some projects made by CS50 students this year. I think I'm not a good game developer. So I thought about stimulating ...
user avatar
  • 17.4k
2 votes

Working on PSet0

You could do a simple maze :) Scratch is very intuitive, you could literaly do anything that comes to mind. Good luck
user avatar
  • 25
2 votes

How to solve problem set 0 and how to submit it?

Head to http://scratch.mit.edu/ and sign up for an account on MIT’s website by clicking Join Scratch atop the page. Your mission is, quite simply, to have fun with Scratch and implement a project of ...
user avatar
  • 141
2 votes

Subtitle files for problem set 0 videos

If you're using edx, the videos posted on there have subtitles. Go to Week 0 > Shorts (or click here) and click one of the options on the top bar. I don't see the fourth video listed, however. ...
user avatar
  • 481
2 votes

How can I submit Pset0 if I have problems with the login?

I had the same issue at the login creen saying my email and password were incorrect. In my case, it was because I signed in to edX with my google account. Maybe it has issues calling up my account/...
user avatar
2 votes

I can't see problem set 0 at all

Is this on edx? If so, under that should be "HTML" with a link to the assignment. Or just click here for a link to the 2014 specifications for pset0.
user avatar
  • 481
2 votes

How to make the clone of sprite function in scratch?

There is no default option to know when a clone is clicked but you can simulate this feature using something like this in the page of the original sprite. What this does is that when a clone of the ...
user avatar
  • 1,369
2 votes
Accepted

Why does this check for equality fail to trigger in my Scratch project?

The problem is that the condition Lifes = 0 is only checked once, when the game starts. At that point in the game Lifes = 3, always, so the first condition is ignored because it is false, and the else ...
user avatar
2 votes
Accepted

Problem set 0 hexadecimal

There might be sufficient information at: http://en.wikipedia.org/wiki/Hexadecimal
2 votes
Accepted

How do I submit pset0?

Yes, you can. The final deadline is 31 Dec 2014. pset0 isn't submitted through the submit page. The instructions are listed at the end of the pset. How to Submit To submit this problem set, head to ...
user avatar
  • 18.4k
2 votes
Accepted

Problem with "When I receive message" block

The problem is caused by "Sprite 21". There's a script that says forever if disappear is 18 broadcast "block-disappear" The problem is that even after the message is broadcasted, ...
user avatar
  • 17.4k
2 votes

Where can i see my pset0 grades?

It usually takes up to two weeks for your submissions to get graded. Sometimes they can be graded even within days. If more than two weeks have passed you may want to send an email to Rob Bowden at ...
user avatar
  • 7,326
2 votes
Accepted

How to spawn sprite on random edge axes

You may do it in a few ways this is one of those: https://scratch.mit.edu/projects/168643966/
user avatar
  • 1,139
1 vote
Accepted

Scratch won't play the background music and switch the backdrop in my game. Help pls :(

Place the play sound piece before the forever loop!
user avatar
1 vote

seeking ideas for problem set 0

I would suggest exploring other peoples scratchs to help inspire you and so you can see the different types things the program can do. Also, look at the different sprites the program has and maybe ...
user avatar
1 vote

how to answer problem sets

The instructions for the problem sets are very clearly described step by step in the problem sets. This is the first (pset0): http://cdn.cs50.net/2015/x/psets/0/pset0/pset0.html
user avatar
  • 425
1 vote

Where to submit Problem set 0 assignments

From the problem set: To submit this problem set, visit http://cs50.edx.org/2015/psets/0/. You’ll find that a few questions await. Be extra-sure that your answers are correct, particularly ...
user avatar
  • 425
1 vote

Pset0 - trying to upload a sound

Try turning it on and recording at the same time...
user avatar
  • 1,211
1 vote

Pset0 - trying to upload a sound

Scratch sounds can only be mp3 format, so you probably need to convert the turkey sound to mp3. I happened to use Media Monkey to convert it, but I'm sure there are a number of online solutions. [...
user avatar
  • 481
1 vote
Accepted

How to delete a variable in scratch

You can't change it to a local variable far as I know, but you can right click the variable and select "delete variable" to remove it.
user avatar
  • 481
1 vote

Can't move sprites in the Scratch project page

In the editor window, you can always move sprites around with them mouse in order to set their initial position. This is because you are the programmer, and you are editing the sprites. However, ...
user avatar
  • 2,136

Only top scored, non community-wiki answers of a minimum length are eligible