[C] int array
```c #include
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- c 23
- swift 13
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- os 13
- linux 3
- basic command 3
- control Statement 2
- go 2
- var 1
- let 1
- tuple 1
- optional 1
- Type Casting 1
- conditional 1
- loop 1
- method 1
- class 1
- closure 1
- extension 1
- inheritance 1
- Conditional Statements 1
- for in 1
- for 1
- unwrapping 1
- operator 1
c
[C] byte size
```c #include
[C] float VS double
float
[C] struct initialization, swap
initialization
[C] assignment, swap
assignment
[C] overflow
```c #include
[C] Casting
```c #include
[C] ASCII CODE
```c #include
[C] sizeof
```c #include
[C] Array Input/Output
int array
[C] Structure Input/Output
```c #include
[C] String Input/Output
scanf
[C] Character Input/Output
getchar : Read character
[C] Integer Type Input/Output
scanf : Formatted Read printf : Formatted Write
[C] Floating Point Type Input/Output
```c #include
[C] Printf
Integer Type Print
[C] Conversion specification
```c #include
[C] putchar, puts
putchar
[C] Operator
Arithmetic Operators ```c #include
[C] Variable Declaration
Variable Declaration ```c #include
[C] Floating Point Type
Floating Point Type Print ```c #include
[C] Integer Type
Integer Type Print
[C] Console Output
printf()
swift
[Swift_tip 1] Conditional Statements, foreach, enum, for, unwrapping
Conditional Statements ```swift import UIKit
[Swift] Inheritance
Superclass and subclass parent class is super class child class is subclass child class can use all things of parent class single inheritance.
[Swift] Extension
Extension add property
[Swift] Closure and Trailing closure
Closure Closure is independent code block
[Swift] Class
Property need the initial value. initial value Initialize to init optional variable, constant
[Swift] Method
Method function in class, struct and enum.
[Swift] Loop
For loop for var i = 0; i < 10; i+=1 { print(i) } // error // C-style for statement has been removed in Swift 3 ```swift for i in 0..<10 { pri...
[Swift] Conditional
If var x = 10 if x > 5 { print("greater than 5") } If -else var x = 2 if x % 2 == 0 { print("even number") } else { print("odd number") }
[Swift] Type casting
Upcasting (as) Child instance as parent class Safe casting
[Swift] Int vs Optional Int
Int 10 Int Store Int-type values
[Swift] Var, Let and Tuple
var Values assigned to variables can be changed var myVar = 10 // :Int var x = 0.0, y = 0.0, z = 0.0
[Swift] Data type
Data type basic Saving Numbers in a Swift Program var num : Int = 10 var num = 10 If there is an initial value as shown above, the com...
[Swift] Print
Print print(1, 2, 3, 4, 5) // 1 2 3 4 5 print(1, 2, 3, 4, 5, separator: "-") // 1-2-3-4-5 separator : print the string between each item
operating system
[OS]I/O System and Disk Management
I/O Mechanisms Processor controlled memory access Polling (Programmed I/O) Interrupt Direct Memory Access (DMA)
[OS]File System
Disk System Disk pack Sector Track Cylinder Platter Surface Disk drive Head Arm Positi...
[OS]Virtual memory management
Virtual memory Non-continuous allocation Paging/Segmentation system
[OS]Virtual memory
Virtual Storage (Memory) Non-continuous allocation
[OS]Main memory management
Memory Background processor registers <-> (word) cache memory <-> main memory <-> (block) auxiliary storage(Disk)
[OS]Deadlock Resolution
Deadlock Blocked / Asleep state Deadlock state Deadlock vs Starvation
[OS]Process Synchronization and Mutual Exclusion
Process Synchronization Multiple programming system Synchronization
[OS]Basic Scheduling algorithms
FCFS(First-Come-First-Service) Non-preemptive scheduling Scheduling criteria ready queue High resource utilization Low s...
[OS]Process Scheduling
Multi-programming Multiple processes exist in the system Select a process to allocate resources Scheduling Resource Management ...
[OS]Thread management
Thread Light Weight Process(LWP) Components Thread ID Register set Stack Benefits of Thread Responsiveness Resou...
[OS]Process management
Job vs Process Job / Program Programs + Data to run Status before the execution request to the computer system
[OS]Operating System Overview
Operating System User Interface CUI GUI EUCI
[OS]Computer System Overview
Computer Hardware Processor CPU GPU Memory RAM, ROM HDD, SSD I/O Device Keyboard, Mouse ...
os
[OS]I/O System and Disk Management
I/O Mechanisms Processor controlled memory access Polling (Programmed I/O) Interrupt Direct Memory Access (DMA)
[OS]File System
Disk System Disk pack Sector Track Cylinder Platter Surface Disk drive Head Arm Positi...
[OS]Virtual memory management
Virtual memory Non-continuous allocation Paging/Segmentation system
[OS]Virtual memory
Virtual Storage (Memory) Non-continuous allocation
[OS]Main memory management
Memory Background processor registers <-> (word) cache memory <-> main memory <-> (block) auxiliary storage(Disk)
[OS]Deadlock Resolution
Deadlock Blocked / Asleep state Deadlock state Deadlock vs Starvation
[OS]Process Synchronization and Mutual Exclusion
Process Synchronization Multiple programming system Synchronization
[OS]Basic Scheduling algorithms
FCFS(First-Come-First-Service) Non-preemptive scheduling Scheduling criteria ready queue High resource utilization Low s...
[OS]Process Scheduling
Multi-programming Multiple processes exist in the system Select a process to allocate resources Scheduling Resource Management ...
[OS]Thread management
Thread Light Weight Process(LWP) Components Thread ID Register set Stack Benefits of Thread Responsiveness Resou...
[OS]Process management
Job vs Process Job / Program Programs + Data to run Status before the execution request to the computer system
[OS]Operating System Overview
Operating System User Interface CUI GUI EUCI
[OS]Computer System Overview
Computer Hardware Processor CPU GPU Memory RAM, ROM HDD, SSD I/O Device Keyboard, Mouse ...
linux
[Linux] Command for Program
Ctrl + z, Ctrl + c
[Linux] basic command 1
cat, tac
[Linux] Command for File
Command form Command [option] argument1 argument2 ...
basic command
[Linux] Command for Program
Ctrl + z, Ctrl + c
[Linux] basic command 1
cat, tac
[Linux] Command for File
Command form Command [option] argument1 argument2 ...
control Statement
[Swift] Loop
For loop for var i = 0; i < 10; i+=1 { print(i) } // error // C-style for statement has been removed in Swift 3 ```swift for i in 0..<10 { pri...
[Swift] Conditional
If var x = 10 if x > 5 { print("greater than 5") } If -else var x = 2 if x % 2 == 0 { print("even number") } else { print("odd number") }
go
[Go] Variable
Variable Declaration
[Go] Console Output
Printf()
var
[Swift] Var, Let and Tuple
var Values assigned to variables can be changed var myVar = 10 // :Int var x = 0.0, y = 0.0, z = 0.0
let
[Swift] Var, Let and Tuple
var Values assigned to variables can be changed var myVar = 10 // :Int var x = 0.0, y = 0.0, z = 0.0
tuple
[Swift] Var, Let and Tuple
var Values assigned to variables can be changed var myVar = 10 // :Int var x = 0.0, y = 0.0, z = 0.0
optional
[Swift] Int vs Optional Int
Int 10 Int Store Int-type values
Type Casting
[Swift] Type casting
Upcasting (as) Child instance as parent class Safe casting
conditional
[Swift] Conditional
If var x = 10 if x > 5 { print("greater than 5") } If -else var x = 2 if x % 2 == 0 { print("even number") } else { print("odd number") }
loop
[Swift] Loop
For loop for var i = 0; i < 10; i+=1 { print(i) } // error // C-style for statement has been removed in Swift 3 ```swift for i in 0..<10 { pri...
method
[Swift] Method
Method function in class, struct and enum.
class
[Swift] Class
Property need the initial value. initial value Initialize to init optional variable, constant
closure
[Swift] Closure and Trailing closure
Closure Closure is independent code block
extension
[Swift] Extension
Extension add property
inheritance
[Swift] Inheritance
Superclass and subclass parent class is super class child class is subclass child class can use all things of parent class single inheritance.
Conditional Statements
[Swift_tip 1] Conditional Statements, foreach, enum, for, unwrapping
Conditional Statements ```swift import UIKit
for in
[Swift_tip 1] Conditional Statements, foreach, enum, for, unwrapping
Conditional Statements ```swift import UIKit
for
[Swift_tip 1] Conditional Statements, foreach, enum, for, unwrapping
Conditional Statements ```swift import UIKit
unwrapping
[Swift_tip 1] Conditional Statements, foreach, enum, for, unwrapping
Conditional Statements ```swift import UIKit
operator
[C] Operator
Arithmetic Operators ```c #include