erain

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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.

erain

package main

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

erain

;; 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

erain

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!

erain

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

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#! /usr/bin/env python

import redis
import random
import pylibmc
import sys

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

erain

Install OpenResty in Ubuntu 12.04

Compile Options

When we compile OpenResty, we would like to have a "good enough" version so that every plugin in our project is installed.

./configure --prefix=/opt/openresty \
--conf-path=/etc/nginx/nginx.conf \
--with-luajit \

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def read_producer(text, coroutines):
    for word in text.split():
        for coroutine in coroutines:
            coroutine.send(word)
    for coroutine in coroutines:
        coroutine.close()


def match_filter(pattern, next_coroutine):
    print("Looking for {0}".format(pattern))

erain

erain

Ubuntu Basic Setup

sudo apt-get install -y vim tmux build-essential zsh python-setuptools python-dev git curl python-software-properties software-properties-common

To setup oh-my-zsh

curl -L http://install.ohmyz.sh | sh
chsh -s $(which zsh)