Dmitry Soshnikov DmitrySoshnikov

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	/**
	* Basic Array class, similar to std::array.
	*
	* by Dmitry Soshnikov <[email protected]>
	* MIT Style License (C) 2020
	*/

	#ifndef __Array_h
	#define __Array_h

	let offset = 20000;
	let chunk_size = 10000;

	// File handle:
	let mut handle = BufReader::new(File::open("data.bin").await?);

	// Set cursor to needed chunk:
	let mut chunk_stream = handle
	.bytes()
	.skip(offset)

	/**
	* Writing a Mark-Sweep Garbage Collector in C++.
	*
	* This is a source code for the Lecture 9 from the
	* Essentials of Garbage Collectors course:
	*
	* http://dmitrysoshnikov.com/courses/essentials-of-garbage-collectors/
	*
	* See full details in:
	*

	<!DOCTYPE html>
	<html>
	<head>
	<title>Sierpiński triangle</title>
	</head>
	<body>
	<canvas id="area" width="600" height="600"></canvas>
	<script type="text/javascript">

	// Sierpiński_triangle:

	/**
	* -------------------------------------------
	* Thread-safe vs. Non-thread-safe. Mutex.
	* -------------------------------------------
	*
	* Some resources (like global `cout` stream) have to be guarded
	* in order to be thread-safe.
	*
	* The simplest way to guard is to use a mutex:
	*

	/**
	* Filter object properties.
	*
	* by Dmitry Soshnikov <[email protected]>
	* MIT Style license, 2019
	*/

	const filterProps = (
	[p1, p2, p3],
	{

	/**
	* Async iterators simple example.
	*
	* by Dmitry Soshnikov <[email protected]>
	* MIT Style License, 2018
	*/

	async function* streamChunks() {
	yield genChunk(1);
	yield genChunk(2);

	/**
	* Educational "Free-list" memory allocator.
	*
	* Maintains explicit list of free memory blocks, reuses blocks on free.
	* Implements "first-fit" strategy. Uses pre-allocated heap of 64 bytes,
	* with 32-bit machine word size.
	*
	* TODO:
	*
	* - Implement "best-fit" strategy

	; ___ _ __ ___ __ ___
	; / __\|_ _ __ _\| \|_____ / /\| __\|/ \_ )
	; \__ \ ' \/ _` \| / / -_) _ \__ \ () / /
	; \|___/_\|\|_\__,_\|_\_\___\___/___/\__/___\|

	; An annotated version of the snake example from Nick Morgan's 6502 assembly tutorial
	; on http://skilldrick.github.io/easy6502/ that I created as an exercise for myself
	; to learn a little bit about assembly. I think I understood everything, but I may
	; also be completely wrong :-)