Yu YI erain

The introduction to Reactive Programming you've been missing

So you're curious in learning this new thing called (Functional) Reactive Programming (FRP).

Learning it is hard, even harder by the lack of good material. When I started, I tried looking for tutorials. I found only a handful of practical guides, but they just scratched the surface and never tackled the challenge of building the whole architecture around it. Library documentations often don't help when you're trying to understand some function. I mean, honestly, look at this:

Rx.Observable.prototype.flatMapLatest(selector, [thisArg])

Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.

环境 (Environment)

版本：Ubuntu 14.04 LTS 默认语言：English(United States)

安装 (Setup)

Debian 和 Ubuntu 下对中文支持比较好的字体有： fonts-droid、ttf-wqy-zenhei 和 ttf-wqy-microhei 等，除了文泉驿系列字体外，比较流行的免费中文字体还有文鼎提供的楷体和上海宋，包名分别是： fonts-arphic-ukai 和 fonts-arphic-uming。

Installation commands:

$ wget http://redis.googlecode.com/files/redis-2.6.7.tar.gz
$ tar xvfz redis-2.6.7.tar.gz 
$ cd redis-2.6.7/
$ sudo mkdir -p /opt/redis
$ sudo make PREFIX=/opt/redis install
$ sudo cp redis.conf /opt/redis/redis.conf
$ cd /opt/redis

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

	;; http://youtu.be/h8bsJV0-2qs
	;; get the following packages:
	;; go-mode
	;; go-eldoc
	;; company-mode
	;; company-go
	;; get the following go programs (run each line in your shell):
	;; go get code.google.com/p/go.tools/cmd/goimports
	;; go get code.google.com/p/rog-go/exp/cmd/godef
	;; go get github.com/nsf/gocode

	package main

	import (
	"net/http"
	"database/sql"
	"fmt"
	"log"
	"os"
	)

	#! /usr/bin/env python

	import redis
	import random
	import pylibmc
	import sys

	r = redis.Redis(host = 'localhost', port = 6389)
	mc = pylibmc.Client(['localhost:11222'])