Welcome to AP Computer Science A. 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.
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 AP Computer Science A 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.
Write a method triple that takes three int
arguments and returns a three-element array containing the three
values.
Write a method lastElement that takes an array of
Strings and returns the last element in the array.
Write a method elementsTheSame that takes an array of
ints and two ints representing indices
into the array and returns true if the array elements
at the two indices are the same value.
Write a method fromEnd that takes an array of
Strings and an int and returns the element
of the array that many spots from the end. I.e. if the second
argument is 0, it should return the last element of the array; if
it’s 1, it should return the second to last element, and so on.
Write a void method swap that takes and array of
Strings and two int arguments representing
indices into the array. It should swap the two elements within the
array.
Write a method lastThree that takes an array of
ints that is at least three elements long and returns a
new array holding the last three elements of the argument array.
Write a method isPalindrome that takes an
int array and returns a boolean indicating
whether the array is a palindrome, i.e. if the values in the array
are in the some order from from to back and back to front.
Write a method squares that takes an array of
ints and returns a new array containing the squares of
all the values in the original array.
Write a method copy that takes an array of
ints and returns a copy of the array, i.e. a new array
containing all the values from the original array in the same order.
Write a method concatenate that takes two
int
arrays and returns a new array containing all the values from the
first array followed by all the values from the second array.
Usual drill. Write as many methods as you can. Note that some of these are designed to be hard enough to justify raising 3s to 4s. But if you’re aiming to increase to a 3 don’t worry if you can’t get them all. On the other hand, some of these are really quite easy—don’t psych yourself out by thinking it needs to be harder; they might really be that easy. (Back to Fall Final page.)
All topics: