Welcome to BHS Computer Science. If you are a student in the class, the first thing you need to do (and which we should have done in class) is set up your GitHub account.
Once you have a GitHub account, click “Log in to GitHub” below to proceed. Or you can click “Use anonymously” to play with the environment but you will not be able to save your work or submit assignments. (You can always log in later by clicking the at the top of the page.)
If you don’t have a GitHub account yet, please create one and then log in here for further instructions.
Congratulations! You have successfully connected this app to GitHub. However you are not yet a member of the GitHub organization for this class, something Mr. Seibel needs to set up for you.
This is your GitHub profile URL:
Click the clipboard icon to copy it and then submit it at this form so he can add you.
Congratulations! You have successfully connected this app to GitHub. And it looks like you have an invitation to join the GitHub organization for this class. You need to accept that invitation before you can proceed. The invite should be sent to whatever email you used when you created your GitHub account.
I see you are logged into GitHub and a member of the berkeley-high-cs GitHub organization. However there seems to have been some problem finishing the setup for your account. Please let Mr. Seibel know.
This is a tool for the BHS Computer Science class at Berkeley High School. It is intended to provide a simple environment for experimenting with Javascript without all the complexities of a full development environment such as ReplIt or Glitch which we may use later in the year.
It is also designed to take advantage of the browser’s ability to run Javascript natively. It does not need access to a server to run code making in extremely responsive even if the Wifi is flaking out.
Finally, under the covers it is saving work to a GitHub repository in a very simplified workflow that does not depend on immediately learning any git commands. Code written in this environment for each assignment is saved to a directory and branch specific to that assignment each time it is saved. Thus when the assignment is done, it is easy to go to GitHub and create a PR containing just the work on that assignment which can then be commented on and worked on further before it is turned in and merged to main.
You're all set! You don't need to worry about this yet but we have successfully created a GitHub repository for your work:
You can get to it any time by clicking on your GitHub username at the top-right of the screen.
This assessment consists of functions you need to write exercising your ability to use Javascript’s basic control constructs. It is a closed book assessment. You should stay on this tab until you are done and there should be no talking. This assessment is about how much you understand. There are no automatic tests but you can use the REPL to test things yourself.
You can move through the questions with the arrows at the upper right
next to the 1 of indicator so if
you're not sure how to write one function move on to another one and
come back if you have time at the end. I want to see how much you do
know. Note: you can also click on
thingsLikeThis in these instructions and the questions to
copy them to the clipboard to avoid spelling mistakes. (I.e. click to
copy and then ⌘-v to paste wherever you want.)
Note The starter code contains a lot of functions. You do not need to worry about how those functions work and don’t need to change them. Write your code below them.
When you are done, please click on your Github username above
and submit a GitHub pull request of the branch
and request me as a reviewer. Doing
this correctly is part of the assessment.
If you are unsure how to request a review, please ask for help!
Write a function named yesIfEven that takes a
single argument which will be a number and returns the string
'yes' if the argument is even and
'no' otherwise.
Write a function named countXs that takes a single
string argument and returns the number of 'x'
characters that occur in the string.
Write a function named timesTable that takes a
single number as its argument and emits a times table of all the
products from 1 × 1 to n × n. Use the emit function
defined in the starter code to actually emit the different
values. It takes three arguments, the two numbers being
multiplied and their product, and prints them out nicely; you
just need to call it once for each pair of arguments. N.B. that
order matters so, assuming you are emitting a times table that
includes 2 × 3 you need to call both
emit(2, 3, 6) and emit(3, 2, 6).
Write a function named containsX that takes a
single string argument and returns a boolean that indicates
whether the string contains any 'x' characters.
Write a function named sumSquares that takes a
single number argument and returns the sum of the squares of all
the positive integers less than the argument. For instance given
the argument 4 it should return 14,
i.e. 12 + 22 + 32, i.e. 1 + 4 +
9.