Day 19

Launch School Pre-curriculum

I'm still reading the book about the Command Line Interface (CLI). Here are some common commands used on the CLI:

cd	Change directory.
ls	List files and directories in current directory.
pwd	Display the path of the current directory.
touch	Create a file.
mkdir	Create a directory.
rm	Remove a file or directory. Warning: deleting a file or directory with this command is permanent!
cp	Copy a file or directory.
mv	Move or rename a file or directory.
echo	Print text to STDOUT.
cat	Display contents of a file.
more	Display contents of a file, starting at the top and letting the user scroll down.
less	Display contents of a file in an even more interactive way.
head	Display the first part of a file.
tail	Display the last part of a file.
man	Display documentation about a command.

Secondary Resources: JavaScript on Khan Academy

My first project for the day was a magic eight ball that displays a different message each time the program is run. Press the restart button to get a new message.

Spin-off of "Project: Magic 8-Ball"Made using: Khan Academy Computer Science

Next I read about using a "rubber duck" as a debugging method. You explain your code step-by-step to a rubber duck as you debug. I think my friend Henry is a good rubber duck. He's not as smart as me, but he'll listen as well as any rubber duck.

Henry

In the next project, I used two while loops to draw rulers across the top and left sides of the canvas.

Challenge: A Loopy RulerMade using: Khan Academy Computer Science

In the third project, I used while loops to repeat a landscape image across the bottom of the screen. 

Challenge: A Loopy LandscapeMade using: Khan Academy Computer Science

In my third project, I was given a while loop that created horizontal lines across the canvas. I converted it to a for loop, then added my own code for a for loop that made vertical lines to make graph paper.

Challenge: Lined PaperMade using: Khan Academy Computer Science

Math Review

I finished 7th grade math on Khan Academy! Woohoo!



Equivalent expressions with negative numbers (multiplication and division): In this video, we figure out whether or not some expressions are equivalent. To do this, we think about properties of multiplication and division.

Languages

French - keeping the Duolingo tree gold

German - Comparison, qualifiers and Household objects 2 (Ich bin ein besserer Bär als Sie)

Spanish - People

Italian - Animals, Food 2, Possession and Clothing (Io sono un orso.)