mightbesimon / UoA-Compsci-2020

Computer Science (2020) - University of Auckland

UoA CompSci 2020

Semester 1

• COMPSCI 130
• COMPSCI 210
• COMPSCI 215
• COVID-19

Semester 2

• COMPSCI 230
• [to be confirmed]

COMPSCI 130

basic Python, I didn't like this class
but it was easy

check out the assignment submissions,
really well commented, they're just beautiful

Prerequisite

Python 3 - the language used in this course

$ python3 --version
Python 3.7.6

Setup

terminal + sublime, personally
any more is just too much

my bash alias setup:

$ echo "alias python=python3" >> .bash_profile

my sublime setup:
save as ~/Library/Application\ Support/Sublime\ Text\ 3/Packages/User/Python\ 3.sublime-build

{
	"cmd":			["/usr/local/bin/python3", "-u", "$file"],
	"file_regex":	"^\\s*File \"(...*?)\", line ([0-9]*)",
	"selector":		"source.python"
}

COMPSCI 210

• LC3 assembly language
• advanced C programming (some were covered in Engineering)

Prerequisites

LC3 simulator lc3sim.jar
LC3 Operating System lc3os.asm
Java to run the simulator

JRE or JDK, either are fine

GCC for compiling C

Assembling

to build an object file
in the LC3 simulator command line:

as program.asm

this should make an object file of the same name program.obj

to load OS and program into the simulator:

reset
load lc3os.obj
load program.obj
load data_to_use.obj

normally this is enough and can then run the program
by clicking "Continue" at the top

set R2 x3000

sets register 2 to value x3000, this is needed in some programs
that starts with .ORIGIN x3000 without OS

Compiling C

Sublime

Cmd+B to build and run without args in sublime

can't run arguments
can't take console inputs (which you shouldn't in C anyways)

Console ( my custom function :D )

append to .bash_profile

function compile() {
	if [[ $1 == *.c ]]; then
		gcc $1 -o ${1%.*}
	fi
}

to compile, run

$ compile program.c
$ ./program arg1 arg2

SSH Server Access

to login

$ ssh [e-mail]

then enter the password

COMPSCI 215

these are just some scripts I wrote to aid breaking encrytions and steganographs

• Feistel cipher
• XOR cipher
• LSB stegano

Use

Import functions as needed
example:

from xor_hex import *
ciphertext = xor_hex('89AB', 'DE01')

COMPSCI 230

[course description]

Prerequisites

Java JDK - the language used in this course

JRE is only the runtime environment
to code java you need JDK

$ java --version
java 13.0.2 2020-01-14
Java(TM) SE Runtime Environment (build 13.0.2+8)
Java HotSpot(TM) 64-Bit Server VM (build 13.0.2+8, mixed mode, sharing)

Setup

once again
terminal + sublime
I dislike IDEs such as Eclipse. Hate the suggestions, I don't need to be told what to do

Bash Aliases and Functions

My own compiling functions :D
append to .bash_profile

Command Line

$ javac classname.c
$ javac classname.c -d build/	# puts class files inside a build folder
															# clean and organised
$ java classname
$ java -cp build/ classname		# run classname in the specified classpath
															# if built into a folder from the previous step
$ jar cvfe classname.jar classname -C build/ .
															# build a .jar archive
$ java -jar classname.jar

Sublime

compile and run:
save as ~/Library/Application\ Support/Sublime\ Text\ 3/Packages/User/JavaBuild.sublime-build

{
	"cmd":			["javac -d build/ $file && java -cp build/ $file_base_name"],
	"shell":		true,
	"file_regex":	"^(...*?):([0-9]*):?([0-9]*)",
	"selector":		"source.java"
}

compile to .jar:
save as ~/Library/Application\ Support/Sublime\ Text\ 3/Packages/User/Jar.sublime-build

{
	"cmd":			["javac $file -d build/ && jar cvfe $file_base_name.jar $file_base_name -C build/ . && java -jar $file_base_name.jar"],
	"shell":		true,
	"file_regex":	"^(...*?):([0-9]*):?([0-9]*)",
	"selector":		"source.java"
}

[descriptive title]

[some sort of description goes here]

Authors

• Simon - buy my merch - mightbesimon

Shoutout to Damir, Mano and everyone in Uoa Compsci 2020

License

use_to_hire_me_only

Acknowledgments

• these are just my sample codes, if you misuse them its not my problem
• Simon misses Engineering very much but CS is fun and easy for him
• shout out to 6 weeks lockdown
• thanks Damir, Mano and all instructors