cblackburn-ajla

module Watcher

    # Ensure compatibility.
    def self.included( mod )
        mod.extend( self )
    end

    # Declare a watcher. The block or lambda will be invoked with argumens of what the value was and now is, in that
    # order.
    def watch( sym, lambda = nil, &block )

cblackburn-ajla

Rails naming conventions

General Ruby conventions

Class names are CamelCase.

Methods and variables are snake_case.

Methods with a ? suffix will return a boolean.

cblackburn-ajla

#!/bin/bash

# CentOS rbenv system wide installation script
# Forked from https://gist.github.com/1237417

# Installs rbenv system wide on CentOS 5/6, also allows single user installs.

# Install pre-requirements
yum install -y gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel openssl-devel \
  make bzip2 autoconf automake libtool bison iconv-devel git-core

cblackburn-ajla

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

cblackburn-ajla

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application: