Aditya Relangi arelangi

Creating a Happy Git Environment on OS X

brew install git bash-completion

Configure things:

git config --global user.name "Your Name"

git config --global user.email "[email protected]"

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

Business Models

Advertising

Models	Examples
Display ads	Yahoo!
Search ads	Google

Sublime to Vim

Use Control+W instead of Alt+Backspace
To unindent a line, use Ctrl+D
To indent a line, use Ctrl+T
Upper-case J joins lines (same as Cmd+J in Sublime Text)
Use :edit! to force a reload of the current file from disk.
To skip to the first non-whitespace character on a line, press ^
yy copies (yanks) a line

Window Commands

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

	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

	<?php
	require_once 'oauth.php';

	$consumer_key = '';
	$consumer_secret = '';
	$access_token = '';
	$access_secret = '';

	$consumer = new OAuthConsumer($consumer_key,$consumer_secret);
	$access = new OAuthToken($access_token,$access_secret);

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

	// 1. Go to page https://www.linkedin.com/settings/email-frequency
	// 2. You may need to login
	// 3. Open JS console
	// ([How to?](http://webmasters.stackexchange.com/questions/8525/how-to-open-the-javascript-console-in-different-browsers))
	// 4. Copy the following code in and execute
	// 5. No more emails
	//
	// Bookmarklet version:
	// http://chengyin.github.io/linkedin-unsubscribed/

	# My steps for creating a DigitalOcean server to run non-exit Tor node for just $5/mo
	# Screen shots of my setup process: https://plus.google.com/photos/+DrewFustini/albums/6057260188204970945
	# Create Digital Ocean account: https://www.digitalocean.com/
	# Create Droplet on Digital Ocean: select $5/mo, and select Debian 7.0 64-bit
	# This instructions are based on Tor Project: https://www.torproject.org/docs/tor-relay-debian.html.en

	afustini@lappy486:~$ ssh [email protected]
	[email protected]'s password:
	You are required to change your password immediately (root enforced)
	Linux Tor300SoF 3.2.0-4-amd64 #1 SMP Debian 3.2.54-2 x86_64