Assignment 7: Implementation · Investigating Mysteries

Working on the Assignment

Errata: In the video I made a mistake when talking about § Dates & Times, question 4. I said that because of the time zone you’d be using 1 late day instead of 2. I should have said that you’d be using 2 late days instead of 3. Thanks Stephan Kemper for finding the mistake.

Character Encodings

25 points

Consult the lecture notes, including the notes under “More Information” that were added after the lecture.

What’s the difference between ASCII, Unicode, UTF-8, and UTF-16?
What’s the difference between an Unicode code point and the encoding of a character in UTF-8?
What are the Unicode normal forms?
For what can you use Unicode normal forms?

What are the two differences between the following strings?

I love OOSE-at least I think I do.
I love OOSE—at least I think I do.

When would you use the characters that are unique to the first string above? When would you use the characters that are unique to the second?
Where in this website can you find the characters that are unique to the second string above?
What’s your favorite weird Unicode code point?

Floating Point Numbers

10 points

What’s the standard for defining floating point numbers (in JavaScript and many other languages)?
What’s a project in which it makes sense to use floating point numbers?
What’s a project in which it makes sense to use numbers with more precision?
What’s a project in which it doesn’t matter what kind of number you use?

Dates & Times

20 points

I submitted my Assignment 5 and Roboose said that the time of my submission was 2019-10-11T14:35:00.000Z.

In what format is this?
What do each of the parts mean?
What time was it in Baltimore when I submitted my assignment?
How many late days (if any) did I use?

The Mystery of That Which Was Itself

35 points

Solve the mystery in a systematic way, showing how you go through the steps we discussed in lecture. After you followed the steps, discuss what the problem is, why it happens, how to fix it, and how to prevent this kind of error in the future.

Challenge Your Assumptions

10 points

Go over some of these lists of things that people assume but that are false. Compile a list of the 10 assumptions that surprised you the most.

Submission

⚠️ Your assignment is submitted only when you submit the form below.

Assignment

GitHub Identifier

For example, jhu-oose-example-student.
Don’t include an @ sign at the beginning—this isn’t a mention.
GitHub identifiers do not start with 2019-student-.

Commit Identifier

For example, 48092726db45fd4bcde21e3712ac2d8e4a094797.
Graders will look at the code base as of this commit.
The code base as of this commit must include the filled in template at assignments/7.md.
You may find the commit identifier on the commits page at https://github.com/jhu-oose/2019-student-<identifier>/commits/master. Usually you want the most recent commit.

Anonymous Feedback on Lecture 7

Confidence
The lecture decreased my confidence in the material that was covered.
The lecture didn’t affect my confidence in the material that was covered.
The lecture increased my confidence in the material that was covered.

Relevance
The lecture covered material that seemed irrelevant.
The lecture covered material that I can’t tell whether is relevant or not.
The lecture covered material that I can tell is relevant.

Difficulty
The lecture was too difficult and I had trouble following.
The lecture was at the right level of difficulty for me.
The lecture was too easy and I got bored.

Pace
The lecture was too fast and I had trouble following.
The lecture was at the right pace for me.
The lecture was too slow and I got bored.

At Least One Specific Thing That You Liked

At Least One Specific Thing That You Think Should Be Improved

Anonymous Feedback on Assignment 7

Approximate Number of Hours Spent

Confidence
The assignment decreased my confidence in the material that was covered.
The assignment didn’t affect my confidence in the material that was covered.
The assignment increased my confidence in the material that was covered.

Relevance
The assignment covered material that seemed irrelevant or didn’t connect well with the lecture.
The assignment covered material that I can’t tell whether is relevant or not or whether it connects with the lecture or not.
The assignment covered material that I can tell is relevant and connects well with the lecture.

Difficulty
The assignment was too difficult and I had trouble completing it.
The assignment was at the right level of difficulty for me.
The assignment was too easy and I got bored.

Load
The assignment was too much work and I had trouble completing it.
The assignment was the right amount of work for me.
The assignment was too little work and I got bored.