Hakim Benoudjit h4k1m0u

Description

Main thread triggers the computing of fib(100) by worker thread on button click. Once done, the worker transmits the result to the main thread.

How to run

Browser cannot load local js file containing worker.

python -m http.server

# fdisk -l # determine Linux partition (e.g. /dev/sda1)
# mount /dev/sda1 /mnt
# mount --bind /dev /mnt/dev
# mount --bind /sys /mnt/sys
# mount --bind /proc /mnt/proc
# update-grub # in case it fails, run before it: grub-install /dev/sda
# umount /mnt/proc
# umount /mnt/sys
# umount /mnt/dev

# df -hT # Show filesystem of devices & partitions
# unmount /dev/sdb1 # Unmount usb stick
# mkfs.fat /dev/sdb1 # Format usb stick using FAT filesystem
# eject /dev/sdb1 # eject usb stick

From the 3rd edition of W. Richard Stevens's Advanced Programming in the Unix Environment 1.

Kernel: Software that controls hardware (e.g. linux).
OS: Kernel plus other apps (e.g. shell).
System calls: Interface to the kernel.
File descriptor: Small non-negative integer to identify files.
When a new program is run the following files are opened (all correspond by default to terminal):
Standard input: fd = 0.

Program

src/hello_ffmpeg.cpp: Read mp4 video and display its metadata.

Prerequisite

sudo apt install libavformat-dev

Notions about video processing

Demuxing: Split individual streams (video, audio, subtitles...) and send them to their respective decoders.

Linkage

Identifiers for variables and constants declared at file scope have external linkage (i.e. visible in other translation units).

Global and static variables

Both are initialized to zero for variables and NULL for pointers by default, and exist for all the lifetime of the program.

Static keyword

A variable declared inside a function that keeps its value between invocations (as if it were global), and so is initialized only once.
Function or variable is only visible (callable) within the same *.c file it was defined into (limited scope => optimal performance).

	#include <stdio.h>
	#include <complex.h>
	#include <gd.h>

	/**
	* Produce a fractal image using Mandelbrot set
	* - Js implementation: https://www.youtube.com/watch?v=6z7GQewK-Ks
	* - Description: https://en.wikipedia.org/wiki/Mandelbrot_set
	* - GD documentation: https://libgd.github.io/manuals/2.1.1/files/preamble-txt.html
	*

	#include <vtkNew.h>
	#include <vtkCylinderSource.h>
	#include <vtkPolyDataMapper.h>
	#include <vtkActor.h>
	#include <vtkRenderer.h>
	#include <vtkRenderWindow.h>
	#include <vtkRenderWindowInteractor.h>

	/* vtkNew allocates & init instance of vtk object on construction */
	int main() {

	#include <pcl/common/distances.h>
	#include <pcl/io/pcd_io.h>
	#include <pcl/visualization/cloud_viewer.h>
	#include <pcl/filters/passthrough.h>

	int main() {
	// pointer to pointcloud
	pcl::PointCloud<pcl::PointXYZ>::Ptr pointcloud(new pcl::PointCloud<pcl::PointXYZ>);

	// load pcd pointcloud file

	""" Get tweets from the profile page of a given USER """
	import sys
	from selenium import webdriver
	from selenium.common.exceptions import TimeoutException
	from selenium.webdriver.common.by import By
	from selenium.webdriver.support.ui import WebDriverWait
	from selenium.webdriver.support import expected_conditions as EC

	# get twitter user from command-line
	if len(sys.argv) != 2: