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(This is the text of the keynote I gave at Startup Riot 2009. Will update when video becomes available.)

Hi everyone, I'm Chris Wanstrath, and I'm one of the co-founders of GitHub.

GitHub, if you haven't heard of it, has been described as "Facebook for developers." Which is great when talking about GitHub as a website, but not so great when describing GitHub as a business. In fact, I think we're the polar opposite of Facebook as a business: we're small, never took investment, and actually make money. Some have even called us successful.

Which I've always wondered about. Success is very vague, right? Probably even relative. How do you define it?

After thinking for a while I came up with two criteria. The first is profitability. We employ four people full time, one person part time, have thousands of paying customers, and are still growing. In fact, our rate of growth is increasing - which means January was our best month so far, and February is looking pretty damn good.

Direct links to free Springer books (pdf versions)

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

微信的信息接收与回复，两者是独立的。

信息接收

共同点在于：都有 ToUserName，FromUserName，CreateTime，MsgType，这四个字段。

在信息接收方面，分为“普通消息”、“事件推送”，“语音识别结果(微信用户发送语音，微信服务器翻译成文本，只不过比语音消息多一个识别结果字段：Recognition)”。

“普通消息”：http://mp.weixin.qq.com/wiki/index.php?title=接收普通消息

文本消息(通过“Content”关键字来获取文本内容，这点比较重要，也是使用比较多的场合)
图片消息

	Y组合子是Lambda演算的一部分，也是函数式编程的理论基础。

	它是一种方法/技巧，在没有赋值语句的前提下定义递归的匿名函数。
	即仅仅通过Lambda表达式这个最基本的“原子”实现循环/迭代。
	颇有道生一、一生二、二生三、三生万物的感觉。

	虽然Y组合子在理论上很优美，但在实际开发中并不会真的用到。

	想要了解Y组合子是什么，请参见维基百科：http://en.wikipedia.org/wiki/Fixed-point_combinator#Y_combinator
	或者知乎上的回答：http://www.zhihu.com/question/20115649

	{
	"keys": ["tab"],
	"command": "expand_abbreviation_by_tab",

	// put comma-separated syntax selectors for which
	// you want to expandEmmet abbreviations into "operand" key
	// instead of SCOPE_SELECTOR.
	// Examples: source.js, text.html - source
	"context": [
	{

	# GNU Screen - main configuration file
	# All other .screenrc files will source this file to inherit settings.
	# Author: Christian Wills - [email protected]

	# Allow bold colors - necessary for some reason
	attrcolor b ".I"

	# Tell screen how to set colors. AB = background, AF=foreground
	termcapinfo xterm 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm'

	"""
	A perl Data.Dumper clone for Python
	Author: [email protected]
	2011-07-08
	"""
	#!/bin/env python

	import sys
	from types import *

	# Feel free to change this path of course (and keys_zone value as well, but also change the usage of it below).
	proxy_cache_path /var/www/cache/resized levels=1:2 keys_zone=resizedimages:10m max_size=1G;

	# Gzip was on in another conf file of mine...You may need to uncomment the next line.
	#gzip on;
	gzip_disable msie6;
	gzip_static on;
	gzip_comp_level 4;
	gzip_proxied any;
	# Again, be careful that you aren't overwriting some other setting from another config's http {} section.

	// Use Gists to store code you would like to remember later on
	console.log(window); // log the "window" object to the console

	#!/bin/sh

	# Alot of these configs have been taken from the various places
	# on the web, most from here
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

	# Set the colours you can use
	black='\033[0;30m'
	white='\033[0;37m'
	red='\033[0;31m'