ruohan.chen crhan

Dear Rubyists,

I just lost a contract because of my code in a Rails project.

The specific code in question is related to a "posting a comment" feature. Here are the details:

In this project, "posting a comment" does not simply entail inserting a row into the database. It involves a procedure to yes, insert a row, but also detect its language, check for spam, send emails, and "share" it to Twitter and Facebook. I believe this algorithm should be encapsulated. I do not believe it belongs in a controller or a model. I do not believe Active Record callbacks should be used.

The "senior developer", whom is the stake holder's right hand man, said this:

A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

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!

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

Bash Shell启动方式与rc脚本

Shell的不同分类

根据启动Bash Shell的方式不同，对Shell有两种分类方式

登录Shell与非登录Shell

根据Shell的启动方式不同，可以将Shell分为

	load 'rake/helper.rb'

	desc "Set up the VM"
	task :up do
	vm = VM.new
	vm.cli('up')
	end

	desc "Shutdown the VM"
	task :graceful_down do

	#!/bin/bash

	##############################
	# dnspodsh v0.3
	# 基于dnspod api构架的bash ddns客户端
	# 作者：zrong(zengrong.net)
	# 详细介绍：http://zengrong.net/post/1524.htm
	# 创建日期：2012-02-13
	# 更新日期：2012-03-11
	##############################

	module Order
	module Ranking
	def self.included(base)
	base.extend(ClassMethods)
	end

	def update_r_ranking
	t = self
	t.r_ranking = Topic.calculate_ranking(t.pushes_count, t.created_at)
	t.save(:validate => false)

	#! /bin/sh
	alias gs="git status"
	alias gc="git commit"
	alias gr="git checkout"
	alias ga="git add"
	alias gl="git lola"

	# The latest version of this script is now available at
	# https://github.com/jasoncodes/dotfiles/blob/master/aliases/rbenv.sh

	VERSION=1.9.3-p286
	brew update
	brew install rbenv ruby-build rbenv-vars readline ctags
	if [ -n "${ZSH_VERSION:-}" ]; then
	echo 'eval "$(rbenv init - --no-rehash)"' >> ~/.zshrc
	else
	echo 'eval "$(rbenv init - --no-rehash)"' >> ~/.bash_profile