Imtiaz Shakil Siddique imtiazShakil

General: Basic review items that should be checked always

check all corner cases

Frontend: review items for spa app

build the project and view the changed pages to make sure everything is working perfectly
package.json updated?

Question:
https://dev.mysql.com/doc/refman/8.0/en/datetime.html

According to doc, other than TIMESTAMP, date & datetime values are not converted for storage using any time zone. This makes since, since if one uses LocalDate & LocalDateTime in Java, which also doesn't contain any time zone info, and since MySQL says no timezone conversion happens for storing/retreiving date/datetime values, why should I define a timezone to MySQL connection to retrieve those values correctly?

Answer:
The way MySQL Server handles temporal data and temporal data exchanged between a Client and a Server are different things.

The documentation you referred pertains to how MySQL Server stores and retrieves temporal data and if some kind of TZ adjustments occur in the process. For example, suppose the server is configured with TZ UTC+02:00 and you store the same instant X in a TIMESTAMP column and a DATETIME column; when you retrieve the same data you'll see the same instant X values, but if you change the serv

Docker Basics

# get id of active containers
docker ps
docker ps -a # get all containers

docker stop <the-container-id>
docker rm <the-container-id>

# stop and remove

Didn't install docker desktop for linux (i think it's heavy, as it has its own vm)
installed docker engine for linux

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

Shorten the depth of directory in command-line:

edit .bashrc file: nano ~/.bashrc
add this line: PROMPT_DIRTRIM=2
exit terminal and open again
now only last two directories will printed in terminal

more info: https://www.gnu.org/software/bash/manual/html_node/Bash-Variables.html#index-PROMPT_005fDIRTRIM
https://unix.stackexchange.com/questions/381113/how-do-i-shorten-the-current-directory-path-shown-on-terminal

SSH Keys settings for github and gitlab

create different public key

create different ssh key according the article generate ssh key

$ ssh-keygen -t ed25519 -C "[email protected]"

Choice List: https://oauth.net/code/java/

Option 1: MITREid Connect

Good:

based on Java, Spring, and Spring Security
Supports basic OpenID Connect features
Active Community
so and so documentation
RESTful API for managing clients, scopes, whitelists, blacklists, approvals, and tokens

Description	Shortcut	Comments
show desktop	`Super` + `D`	linux + windows
cycle open window	`Alt` + `Tab`	linux + windows
show all windows	`Ctrl` + `Alt` + `Down`	linux Mint
show all workspaces	`Ctrl` + `Alt` + `Up`	linux Mint
snap window up/down/left/right	`Super` + `⬆️ ⬇️ ⬅️ ➡️`	linux
move window to left/right workspace	`Shift` + `Ctrl` + `Alt` + `⬅️ ➡️`	linux
move window to left/right monitor	`Shift` + `Super` + `⬅️ ➡️`	linux
switch to left/right workspace	Ctrl + Alt + ⬅️ ➡️	linux

Description	Shortcut	Used in Ide
Delete Line	`Ctrl` + `Shift` + `k`	(Sublime, Intellij, VScode)
format file	`Shift` + `Alt` + `f`	(VScode-windows)
Goto Class/file	`Ctrl` + `P`	(sublime, VScode)
Goto Symbol/Methods	`Ctrl` + `R`	(sublime)
Goto Line	`Ctrl` + `G`	(sublime, VScode, Intellij, Eclipse)
Command/Action	`Ctrl` + `Shift` + `P`	(Sublime, VScode)
Quick Defintion (source code)	`Ctrl` + `Shift` + `i`	(Browser, Intellij)
Quick Type Definition	Ctrl + Q	(Intellij)

	Below are the Big O performance of common functions of different Java Collections.


	List \| Add \| Remove \| Get \| Contains \| Next \| Data Structure
	---------------------\|------\|--------\|------\|----------\|------\|---------------
	ArrayList \| O(1) \| O(n) \| O(1) \| O(n) \| O(1) \| Array
	LinkedList \| O(1) \| O(1) \| O(n) \| O(n) \| O(1) \| Linked List
	CopyOnWriteArrayList \| O(n) \| O(n) \| O(1) \| O(n) \| O(1) \| Array