Andrey Streltsov andrey-str

Download videos from egghead

Go to the egghead website, i.e. Building a React.js App

run

$.each($('h4 a'), function(index, video){
  console.log(video.href);
});

KVM OSX Guest 10.11 (El Capitan) with Clover

Some notes about this approach:
- An OSX Installer USB drive for Install OS X El Capitan is created
- Clover is then installed on the USB drive
- Clover Configurator is then run on the USB drive
- The USB drive contents are copied to the VM host
- VNC is used to connect to the guest UI
The qxl virtual video device is used (part of the standard kvm qemu install)

1. Gemfile

gem 'browserify-rails', '1.5.0' # until fix: https://github.com/browserify-rails/browserify-rails/issues/101
gem 'react-rails'

Browserify-rails allows to use browserify within assets pipeline. React-rails is here only to allow to use #react_component (and thus, prerendering).

Note that jquery-rails can be removed from Gemfile, the npm version of jquery and jquery-ujs will be used instead.

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.

Instructions

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

Stop Versioning Rails Secret Tokens

After reading Code Climate's Rails' Insecure Defaults I realized I was guilty of breaking rule 3. Versioned Secret Tokens. Here's how I fixed it.

Use dotenv in development and test environments:

# Gemfile
gem 'dotenv-rails', groups: [:development, :test]

	#!/bin/bash

	# Recursive file convertion windows-1251 --> utf-8
	# Place this file in the root of your site, add execute permission and run
	# Converts .php, .html, .css, .js files.
	# To add file type by extension, e.g. .cgi, add '-o -name ".cgi"' to the find command

	find ./ -name ".php" -o -name ".html" -o -name ".css" -o -name ".js" -type f \|
	while read file
	do

	prompt:/# kvm -version

	QEMU emulator version 2.9.0 (v2.9.0-dirty)
	Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers


	prompt:/# uname -a

	Linux ThinkPad-P50 4.13.8-041308-generic #201710180430 SMP Wed Oct 18 08:33:18 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

	+ (instancetype)sharedInstance
	{
	static dispatch_once_t once;
	static id sharedInstance;
	dispatch_once(&once, ^{
	sharedInstance = [[self alloc] init];
	});
	return sharedInstance;
	}

	class Integer
	N_BYTES = [42].pack('i').size
	N_BITS = N_BYTES * 16
	MAX = 2 ** (N_BITS - 2) - 1
	MIN = -MAX - 1
	end

	p Integer::MAX #=> 4611686018427387903
	p Integer::MAX.class #=> Fixnum
	p (Integer::MAX + 1).class #=> Bignum

	#!/bin/bash

	find "$1" -type f -name "*.ape" -print0 \| while read -d $'\0' song

	do
	output=${song%.ape}.mp3
	cue=${song%.ape}.cue
	avconv -i "$song" -b 192k "$output"
	if ls "$cue" &> /dev/null; then
	mp3splt -a -c "$cue" "$output"