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Alvin Liang aliang

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  • Burlingame, CA
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@aliang
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
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
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
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
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
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
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
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
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
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 "\[" ;