aliang’s gists

aliang / each_by_page.rb

Last active December 16, 2015 20:19

helper to iterate all by pagination using kaminari

	# Probably should investigate how to chain this with scopes
	# Also assumes mongoid with a default _id field, and the order_by method

	class MyModel
	def self.each_by_page(options = {})
	per = options[:per] \|\| 25
	order_by = options[:order_by] \|\| [:_id, 1]
	i = 1
	until (current_page = self.order_by(order_by).page(i).per(per)).empty?
	current_page.each do \|obj\|

aliang / knife.rb

Created July 23, 2012 09:44 — forked from wilmoore/knife.rb

Base "knife" configuration for a standard chef-solo setup

	# .chef/knife.rb
	# SEE: http://wiki.opscode.com/display/chef/Troubleshooting+and+Technical+FAQ
	# set some sensible defaults
	current_dir = File.dirname(__FILE__)
	user = ENV['OPSCODE_USER'] \|\| ENV['USER']

	log_level :debug
	log_location STDOUT
	node_name `hostname`
	client_key ''

aliang / knife.rb

Created March 22, 2012 21:37 — forked from jtimberman/knife.rb

Commented knife.rb for all the things

	# Knife Configuration File.
	#
	# This is a Ruby DSL to set configuration parameters for Knife's
	# general options. The default location for this file is
	# ~/.chef/knife.rb. If multiple Chef repositories are used,
	# per-repository configuration files can be created. A per repository
	# configuration file must be .chef/knife.rb in the base directory of
	# the Chef repository. For example,
	#
	# ~/Development/chef-repo/.chef/knife.rb

aliang / installation.sh

Created February 18, 2012 22:39 — forked from mikhailov/installation.sh

Nginx+passenger application config: ssl redirection, http headers, passenger optimal settings. see details: http://mikhailov.posterous.com/nginx

	$ cd /usr/src
	$ wget http://nginx.org/download/nginx-0.8.52.tar.gz
	$ tar xzvf ./nginx-0.8.52.tar.gz
	$ rm ./nginx-0.8.52.tar.gz

	$ gem install s3sync capistrano capistrano-ext passenger --no-ri --no-rdoc
	$ passenger-install-nginx-module
	# Automatically download and install Nginx? 2. No: I want to customize my Nginx installation
	# Where is your Nginx source code located?: /usr/src/nginx-0.8.52
	# Where do you want to install Nginx to?: /opt/nginx

aliang / build_less.py

Created January 22, 2012 09:08 — forked from remcoder/build_less.py

Compile LESS to CSS automatically whenever a file is modified

	#!/usr/bin/env python

	# determines filename and extension, then delegates compiling the LESS files to lessc via a shell command

	import sys, os.path
	from subprocess import call

	src = sys.argv[1]

	base,ext = os.path.splitext(src)

aliang / gist:1507475

Created December 21, 2011 20:04

recursive globbing

	def find_files(directory, pattern):
	for root, dirs, files in os.walk(directory):
	for basename in files:
	if fnmatch.fnmatch(basename, pattern):
	filename = os.path.join(root, basename)
	yield filename

	for f in find_files(".", "*.txt"):
	print f

aliang / gist:1393029

Created November 25, 2011 08:02

monkey patch to make pymongo not throw ridiculous AutoReconnect errors

	# Stolen from http://paste.pocoo.org/show/224441/

	from pymongo.cursor import Cursor
	from pymongo.connection import Connection
	from pymongo.errors import AutoReconnect

	from time import sleep

	def reconnect(f):
	def f_retry(args, *kwargs):

aliang / parse_query.rb

Created June 20, 2011 22:00

search query string parser, google-ish

	# via http://jablan.radioni.ca/post/4982485974/parsing-search-query-in-ruby

	def parse_query s
	s.scan(/((\S+)\:\s?)?([+-])?(("(.+?)")\|(\S+))/).map{\|match\|
	Hash[
	[nil, :prefix, :plusminus, nil, nil, :phrase, :word].zip(match).select(&:all?)
	]
	}
	end

aliang / triangles.html

Created June 20, 2011 09:21

triangles without images

	<!DOCTYPE html>
	<html lang="zh-CN">
	<head>
	<title>Triangle</title>
	<meta charset="utf-8" />
	<style type="text/css">
	.a{width:0;height:0;border-top:100px solid #0099ff;border-left:100px solid #ff9900;border-right:100px solid #F6402D;border-bottom:100px solid #8CC63E; float:left;}
	.b{
	width:0;height:0;border-top:100px solid #0099ff;border-left:100px solid transparent;border-right:100px solid transparent;border-bottom:0; margin-left:60px; float:left;}
	.c{width:0;height:0;border-top:100px solid transparent;border-left:0;border-right:100px solid transparent;border-bottom:100px solid #0099ff; margin-left:60px; float:left;}

aliang / Mac SSH Autocomplete

Created June 14, 2011 07:14

Add auto complete to your ssh, put into your .bash_profile

	_complete_ssh_hosts ()
	{
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	comp_ssh_hosts=`cat ~/.ssh/known_hosts \| \
	cut -f 1 -d ' ' \| \
	sed -e s/,.*//g \| \
	grep -v ^# \| \
	uniq \| \
	grep -v "\[" ;

	_complete_ssh_hosts ()
	{
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	comp_ssh_hosts=`cat ~/.ssh/known_hosts \| \
	cut -f 1 -d ' ' \| \
	sed -e s/,.*//g \| \
	grep -v ^# \| \
	uniq \| \
	grep -v "\[" ;

Alvin Liang aliang