drkdev DarrenKwonDev

NodeJS Streams

Current implementation is known as streams2.
Introduced in node v0.10.
"suck" streams instead of "spew" streams.
Instead of data events spewing, call read() to pull data from source.
When there isn't any data to consume, then read() will return undefined.
Adding a data event listener will switch the Readable stream into "old mode", where data is emitted as soon as it is available rather than waiting for you to call read() to consume it. This requires you to handle backpressure problems manually.
The pipe method helps write less code and handles back-pressure.
If you add an end listener and don't ever read() or pipe(), it'll never emit end.

Most VPN Services are Terrible

Short version: I strongly do not recommend using any of these providers. You are, of course, free to use whatever you like. My TL;DR advice: Roll your own and use Algo or Streisand. For messaging & voice, use Signal. For increased anonymity, use Tor for desktop (though recognize that doing so may actually put you at greater risk), and Onion Browser for mobile.

This mini-rant came on the heels of an interesting twitter discussion: https://twitter.com/kennwhite/status/591074055018582016

	#!/bin/bash

	# --------------------
	# register this script in cronjob
	# --------------------

	TARGET_IP="" # fill this
	PING_TIMEOUT=10
	LOG_FILE="/var/log/ts_monitor.log"
	CNT_FILE="/tmp/ts_fail_cnt"

	$userPath = $env:USERPROFILE
	$pathExclusions = New-Object System.Collections.ArrayList
	$processExclusions = New-Object System.Collections.ArrayList

	$pathExclusions.Add('C:\Windows\Microsoft.NET') > $null
	$pathExclusions.Add('C:\Windows\assembly') > $null

	$pathExclusions.Add($userPath + '\Downloads\HeidiSQL_11.3_64_Portable') > $null

	$pathExclusions.Add($userPath + '\.dotnet') > $null

	#include <fstream>
	#include <iostream>
	#include <string>
	#include <locale>
	#include <codecvt>
	...

	// Write file in UTF-8
	std::wofstream wof;
	wof.imbue(std::locale(std::locale::empty(), new std::codecvt_utf8<wchar_t,0x10ffff,std::generate_header>));

	#include <fstream>
	#include <iostream>
	#include <string>
	#include <locale>
	#include <codecvt>
	...

	// Write file in UTF-8
	std::wofstream wof;
	wof.imbue(std::locale(std::locale::empty(), new std::codecvt_utf8<wchar_t,0x10ffff,std::generate_header>));

	# Git Aliases (sorted alphabetically with some inculsive functions)
	# Adapted from oh-my-zsh git alias plugin. "compdef" is a Z shell autocompletion function, disabled throughout where applicable.

	alias g='git'

	alias ga='git add'
	alias gaa='git add --all'
	alias gapa='git add --patch'

	alias gb='git branch'

	// C++ includes used for precompiling -- C++ --

	// Copyright (C) 2003-2013 Free Software Foundation, Inc.
	//
	// This file is part of the GNU ISO C++ Library. This library is free
	// software; you can redistribute it and/or modify it under the
	// terms of the GNU General Public License as published by the
	// Free Software Foundation; either version 3, or (at your option)
	// any later version.

	for (var i = 0; i < 1024 * 1024; i++) {
	process.nextTick(function () { Math.sqrt(i) } )
	}

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD