ThinhPhan

WPE Issues

OpenGL

Read more OpenGL Error

• glGetError 0x502 : means invalid operation
• glGetError 0x505 : means out-of-memory reported by the opengl gpu driver --> Solution: Share more memory to GPU

ThinhPhan

dwc_otg.lpm_enable=0 console=null root=LABEL=resin-rootA rootfstype=ext4 rootwait vt.global_cursor_default=0    

ThinhPhan

Keybase proof

I hereby claim:

• I am ThinhPhan on github.
• I am vincentphan (https://keybase.io/vincentphan) on keybase.
• I have a public key whose fingerprint is DD84 89C3 55B3 FDD0 201E 4E48 E6B6 FB5E 0726 1456

To claim this, I am signing this object:

ThinhPhan

Hello World

This is how npx work. Enjoy yourself.

Copy the URL above on your browser's address npx [YOUR-AWESOME-GIST-URL]

ThinhPhan

What is the difference between “chmod +x” and “chmod 755”?

Motivate from this question and answer https://askubuntu.com/a/932719/927010

Short version:

To be able to compare them, we should look at them from the same perspective, so:

chmod +x is equal to chmod ugo+x (Based on umask value) chmod 755 is equal to chmod u=rwx,go=rx

ThinhPhan

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

ThinhPhan

Resourceful Routing for CRUD Operations in Web Applications

Note: The RESTful routes also apply to RESTful APIs, however JSON is returned to the client vs. HTML

RESTful Routes:

HTTP Verb	Path (endpoint)	controller#action	View to Render or Redirect	Purpose
GET	/posts	posts#index	index	List all posts
GET	/posts/:id	posts#show	show	Show a single post

ThinhPhan

Initialize

gitflow	git
git flow init	git init
	git commit --allow-empty -m "Initial commit"
	git checkout -b develop master

Connect to the remote repository

ThinhPhan

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

ThinhPhan

Bash string manipulation cheatsheet

Assignment
Assign value to variable if variable is not already set. Value will be returned. Couple with : no-op if return value is to be discarded.	${variable="value"} : ${variable="value"}