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.
Write any expression that evaluates to the same thing as the product of 1337 and 32
Sally had six thousand, four hundred and thirty two apples and she give four thousand and to Billy. Write an expression for the number of apples Sally has now.
Write any expression that evaluates to the area of a circle with
radius two. (Recall that the formula for the area of a circle is π
times the square of the circle's radius.) You can use
Math.PI to get a good approximation of π.
Write any expression that evaluates to the number of seconds in a day.
The sum of two numbers is what you get when you add them together.
Write an expression for the sum of the two numbers
a and b.
The difference between two numbers is what you get when you subtract
the second from the first. Write an expression for the difference
between the two numbers a and b.
The product of two numbers is what you get when you multiply them.
Write an expression for the product of the two numbers
a and b.
The ratio between two numbers is what you get when you divide the
first by the second. Write an expression for the ratio of the two
numbers a and b.
The remainder of of dividing one number by another is the integer
part left over after doing a division. Write an expression for the
reminder after dividing a by b.
The average of two numbers is their sum divided by two. Write an
expression for the average of the two numbers a and
b.
The distance between two numbers (e.g. on the number line) is the
absolute value of their difference. The
Math.abs function returns the absolute value of its
argument. Write an expression that computes the distance between two
numbers a and b.
The “Manhattan distance” between two points in 2d space is the sum
of the distance between the points along the x axis (crosstown) and
the distance between the points along the y axis (uptown/downtown).
Write an expression that computes the Manhattan distance between two
points the first whose x,y coordinates are given by the numbers
x1 and y1 and the second by the numbers
x2 and y2.
Someone is doing well if they are getting enough sleep and also
keeping up with their schoolwork. Write an expression that expresses
whether someone is doing well given two boolean values
enoughSleep and keepingUp.
Someone is feeling energetic if they are getting enough sleep and
aren't exhausted from having just worked out. Write an expression
that expresses whether someone is energetic given two boolean values
enoughSleep and justWorkedOut.
Someone is really dragging if they haven’t gotten enough sleep and
have lots of work to do. Write an expression that says whether
someone is dragging, given two boolean values
enoughSleep and lotsOfWork.
Someone is super beat if they haven’t gotten enough sleep and
haven’t had enough to eat. Write an expression that says whether
someone is super beat given two boolean values
enoughSleep and eatenEnough.
Roughly speaking, someone can go to Senior Prom if they are a senior
or if they are invited by a senior. Write an expression that says
whether someone can go to prom given the two boolean values
isSenior and invitedBySenior. (In a later
problem set we’ll deal with the more complex reality of the prom
exclusion list.)
If someone is working on something for their own reasons they don’t
need to keep going if it’s not fun any more. So they will stop when
they’re done or when it’s not fun anymore. Write an expression that
says whether they should stop given the two boolean values
done and fun.
Someeone is working on something and aren’t that into it so they’ll
quit if it’s not fun. And even if it is fun but they’re feeling
tired they’ll also call it quits. Write an expression that says
whether they’ll stop given the two boolean values
fun and tired.
Someone is unable to go to sleep unless it’s totally dark. Also they
obviously can’t sleep when they’re not sleepy. Write an expression
that says whether they’re awake given the boolean values
sleepy and dark.
We want to go shopping but we obviously won’t if the store isn’t
open. But we’ll also wait for another day if the lines are too long.
Write an expression that says whether we’ll skip our planned
shopping trip given the two boolean values
storeOpen and linesTooLong.
Now we want to go shopping, but only if the store is having a sale.
As before we obviously won’t go if the store isn’t open but we’ll
also skip the trip if the store isn’t having a sale. Write an
expression using the two boolean values storeOpen and
isASale that says whether we’ll hold off on our trip to
the store.
The book club meets today. We’d expect someone to be at book club if
they’re a member as long as they’re not out sick from school. Write
an expression that says whether we expect someone to be at book club
given the two boolean values member and
outSick.
The football team is very picky and will only allow people on the
team who are both fast and strong. Write an expression in terms of
the two boolean values fast and
strong that says whether someone has a chance to be on
the team.
You’re on a camping trip and you’re trying to light a fire.
Unfortunately you’re having some trouble and are running out of
matches. You’ll stop trying when the fire is lit or when you run out
of matches, whichever comes first. Write an expressian that says
whether you can stop trying using the two boolean values
fireLit and haveMatches.
It can be hard to pay attention if you’re distracted by being
hungry. And obviously it also hard to pay attention to things that
you’re not interested in. Write an expression that says whether you
can pay attention to something given the two boolean values
hungry and interested.
A student should be in our classroom during our class only if
they’re in the class or are a student proctor. Write an expression
that says whether a student should be in the classroom during our
class given the two boolean values inTheClass and
isProctor.
There’s a dark cave full of spiders. You should only go in if you’re
not afraid of th>e dark nor of spiders. Write a boolean expression
using the two values afraidOfTheDark and
afraidOfSpiders that says whether you could go into the
cave.
Write an expression the evaluates to the concatenation of the values
of the string variables s1 and s2.
Write an expression the evaluates to the first character of the
value of the string variable s.
Write an expressions that evaluates to the length of the string
value of the variable s.
Write an expression the evaluates to the last character of the value
of the string variable s.
Write an expression the evaluates to a string containing all but the
first character of the string in variable s.
Write an expression the evaluates to a string containing the first
three character of the string in variable s.
Write an expression the evaluates to a string containing all but the
first and last character of the string in variable s.
Write an expression the evaluates to a string containing the last
three character of the string in variable s.
Write an expression the evaluates to the value of the string
variable s converted to all upper case.
Write an expression the evaluates to the value of the string
variable s converted to all lower case.
Write an expression the evaluates to the the value of the string
variable s with the first letter capitalized and the
remaining letters in lower case.
Write an expression the evaluates to the the value of the string
variable s with the first three letters capitalized and
the remaining letters in lower case.