Computer Science (CS) is applicable to every possible field in the world, from Economics, to Social Science. There’s a place for CS everywhere.
Almost all of the software today is Web Based or Phone Based. Architecture Software should shift to Web-Based Interfaces.
- Learn how to solve problems
- Lean how to represent numbers, letters, colours, images, video, etc
- Learn how to write Algos/Code
It’s not where you end up relative to your peers, but where you end up relative to when you started this course.
Week 1 - C
Computational Thinking clean up your thought processes not just in CS but in every aspect of your life. Because the Secret sauce is the same.
31 is the highest you can count in a Unary System. It is just how you can represent up to the number 31. Also called Base 1
Binary is Base 2 0 & 1
BIT is either a single 0 / 1 Transistors are a switches.
Base 10 System - Decimal System 123 - One Hundred Twenty Three
- taskDifferent Types of Binary/Unary/Decimal, etc deep dive in it 📅 2024-01-28 ✅ 2024-03-24
ASCII is the representation of letters in Numbers starting from 65 for Cap A. ASCII Uses 8Bits. ASCII isn’t enough to represent some Asian/ Accented letters of other alphabets. Emojis are under the UNICODE Representation. UNICODE is a Superset of ASCII. Sometimes use 16Bits.
UNICODE’s mission is to represent and preserve all Human Language letters based from the past, present and the future for all languages.
😂 - Face with Tears of Joy, is the most popular emoji of 2023
Unicode Code Point, - Base 16, Hexadecimal
We are now using UNICODE instead of ASCII. It gives us the ability to showcase 4 Billion Characters
Fitzpatrick Scale, for representing skin tones for Emojis.
Context Matters in Binary Representation
Pseudocode - Writing each steps of the solutions, accurately, succinctly. and line by line.
Arguments >> Function >> Side Effect
Some of the functions basic ones are already developed and stored in files that are called Libraries for example for standard input and output functions are included in the <stdio.h> library for C.
Choice of Numbered Datatype can have memory implication Does it mean that Increasing the precision of your Rhino Model, ask for more computational Power?
This is where Super Computers come into play
Integer Overflow would be an issue on 19th January 2038 as well.
This is closely referenced from Binary Digits
Week 2 - Arrays
Compiling Process when using Make
Decompiling it is difficult to reverse engineer due to the nature of too many ways to solve a given issue, and the fact of loosing a lot of variables and functions declaration in the process.
Read - Why can’t we reverse engineer a code
Arrays - Sequence of values, placed back to back in memory
A string IS a Array of char
NUL value is appended after a word ends always!
Week 3 - Algorithms
Order of Run Time of an Algorithm - Read about it in Detail
Code Smell - Something is Wrong in the Code
Sorting - Read about it in Detail
Recursive Functions - Read about it in Detail Also Read - Google prints did you mean recursion again and again and again!! Lol
Week 4 - Memory
Evey image and videos are stored as 0 and 1 in the memory. RGB - Some amount of red, green and blue.
Notation for Colours - HEX Codes is the HASH RRGGBB
RED = FF0000 GREEN = 00FF00 BLUE = 0000FF
For colours, we use Hexadecimal. (Base 16) 0123456789ABCDEF
Computers use Hexadecimal to denote the address in the memory. 0x Prefix is used to denote hexadecimal.
Pointees Dereferencing
*p means go to the address.
Arrays have contiguous addresses in the memory.
A string is an array of chars. A string variable is technically a pointer that refers to the location of the characters stored contiguously in memory.
HISTORY - WHY DID COMPUTERS EARLIER HAVE ONLY 2GB OG MEMORY. The case of pointer. 32bit vs 64bit
string s = "HI!
char *s = "HI!
They both are the same thing.
malloc is a function that allocates a memory address of a certain length for you. But once this is allocated, you must also dispose or free the resources of the memory once done.
Memory Leak Garbage Value
Passing by Value Passing by Reference
Week 5 - Data Structures
Queue FIFO - First in First Out