Sergii Tkachenko sergiitk

ZSH CheatSheet

This is a cheat sheet for how to perform various actions to ZSH, which can be tricky to find on the web as the syntax is not intuitive and it is generally not very well-documented.

Strings

Description	Syntax
Get the length of a string	`${#VARNAME}`
Get a single character	`${VARNAME[index]}`

I'm getting adverts in my TV's UI, help!

Samsung's otherwise excellent 2016 range of UHD TVs received an update that added advertisements to the UI. This has been complained about at great length on Samsung's forums and repeatedly, Samsung have refused to add an option to remove them.

The ads interrupt the clean UI of the TV and are invasive. Here's an example of how they look:

This guide was originally posted on Samsung's TV forums but unfortunately, that site is a super-slow and barely accessible unusable mess.

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

HD Animated GIF Generator

You can make your own HD animated GIF generator.
Follow along with these commands to get started.

git clone git://source.ffmpeg.org/ffmpeg.git
cd ffmpeg

	#!/bin/bash

	set -e

	function cleanup {
	rm $DIFF_FILE $TMPFILE
	}

	trap cleanup EXIT

	#!/bin/bash
	# Copyright 2020 The gRPC Authors
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software

	; acceleration_enabled = {acceleration_enabled}
	; acceleration_infill = {acceleration_infill}
	; acceleration_ironing = {acceleration_ironing}
	; acceleration_layer_0 = {acceleration_layer_0}
	; acceleration_prime_tower = {acceleration_prime_tower}
	; acceleration_print = {acceleration_print}
	; acceleration_print_layer_0 = {acceleration_print_layer_0}
	; acceleration_roofing = {acceleration_roofing}
	; acceleration_skirt_brim = {acceleration_skirt_brim}
	; acceleration_support = {acceleration_support}

	from flask import Flask
	from flask import request

	from tasks import store_db

	app = Flask(__name__)


	@app.route('/blink', methods=['GET', 'POST'])
	def blink():

	#!/bin/sh

	# 90% from http://mths.be/osx

	# ask for admin password upfront
	sudo -v

	# Keep-alive: update existing `sudo` time stamp until `.osx` has finished
	while true; do sudo -n true; sleep 60; kill -0 "$$" \|\| exit; done 2>/dev/null &