Skip to content

Instantly share code, notes, and snippets.

Alvin Liang aliang

  • Recovers
  • Burlingame, CA
Block or report user

Report or block aliang

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
View virtus-multiparameter_attributes.rb
# Rails datetime_select and similar use multiparameter attributes which are
# these dawful things from the bowels of activerecord and actionpack. This
# module extends virtus models to coerce multiparameter attributes back together
# before assigning attributes.
# Here's the implementation for ActiveRecord:
# and DataMapper:
aliang / shared_examples_for_active_model.rb
Created Jul 7, 2016
ActiveModel::Lint tests for MiniTest 5
View shared_examples_for_active_model.rb
shared_examples_for "ActiveModel" do
require 'minitest/assertions'
require 'active_model/lint'
include MiniTest::Assertions
include ActiveModel::Lint::Tests
# This is the main difference between MiniTest 4 and 5.
# We must keep a counter of assertions.
attr_accessor :assertions
View sequence_counter_ar_fix.rb
models = ActiveRecord::Base.descendants
models.each do |m|
last_id =
m.connection.execute("ALTER SEQUENCE #{m.table_name}_id_seq RESTART WITH #{last_id}")";
aliang / vanity_phone_number_converter.rb
Created Sep 2, 2014
Vanity phone number converter
View vanity_phone_number_converter.rb
# Converts a phone number with letters to a phone number with only numbers.
# Leaves any other characters untouched.
class VanityPhoneNumberConverter
'a' => '2', 'b' => '2', 'c' => '2',
'd' => '3', 'e' => '3', 'f' => '3',
'g' => '4', 'h' => '4', 'i' => '4',
'j' => '5', 'k' => '5', 'l' => '5',
'm' => '6', 'n' => '6', 'o' => '6',
'p' => '7', 'q' => '7', 'r' => '7', 's' => '7',
aliang / disable-leaflet-map-events.js
Created Jun 4, 2014
Disable all (or almost all!) leaflet map events
View disable-leaflet-map-events.js
// Assumes your L.Map is called "map". Untested!
if (map.tap) {
aliang / io_ext.rb
Created May 7, 2014
Select random line from IO object
View io_ext.rb
# See
class IO
# Selects a random "line" from a file (might not be a line if different separator is passed).
# @param *args Same arguments as IO.foreach
# @return A random line from the IO object
def self.random_line(*args)
chosen_line = nil
self.foreach(*args).each_with_index do |line, number|
chosen_line = line if rand < 1.0/(number+1)
aliang / mandrill_signature_verifier.rb
Last active Aug 29, 2015
Mandrill webhook verifier, in Ruby
View mandrill_signature_verifier.rb
class MandrillSignatureVerifier
def initialize(key, url, params, signature)
@key = key
@url = url
@params = params
@signature = signature
# Return true if the signature matches
def verified?
aliang / country_codes.js
Created Apr 17, 2014
Really stupid iso-3166 country code converter. As stupid as possible!
View country_codes.js
var CountryCodes = (function() {
// Codes taken from Wikipedia as of Wed Apr 16 2014
var codes = {"AFG": "AF", "ALA": "AX", "ALB": "AL", "DZA": "DZ", "ASM": "AS", "AND": "AD", "AGO": "AO", "AIA": "AI", "ATA": "AQ", "ATG": "AG", "ARG": "AR", "ARM": "AM", "ABW": "AW", "AUS": "AU", "AUT": "AT", "AZE": "AZ", "BHS": "BS", "BHR": "BH", "BGD": "BD", "BRB": "BB", "BLR": "BY", "BEL": "BE", "BLZ": "BZ", "BEN": "BJ", "BMU": "BM", "BTN": "BT", "BOL": "BO", "BES": "BQ", "BIH": "BA", "BWA": "BW", "BVT": "BV", "BRA": "BR", "IOT": "IO", "BRN": "BN", "BGR": "BG", "BFA": "BF", "BDI": "BI", "KHM": "KH", "CMR": "CM", "CAN": "CA", "CPV": "CV", "CYM": "KY", "CAF": "CF", "TCD": "TD", "CHL": "CL", "CHN": "CN", "CXR": "CX", "CCK": "CC", "COL": "CO", "COM": "KM", "COG": "CG", "COD": "CD", "COK": "CK", "CRI": "CR", "CIV": "CI", "HRV": "HR", "CUB": "CU", "CUW": "CW", "CYP": "CY", "CZE": "CZ", "DNK": "DK", "DJI": "DJ", "DMA": "DM", "DOM": "DO", "ECU": "EC", "EGY": "EG", "SLV": "SV", "GNQ": "GQ", "ERI": "ER", "EST": "EE", "ETH": "ET",
aliang / publicize_methods.rb
Created Dec 12, 2013
Expose private methods for testing. Can accept a block, or just call in RSpec before/after blocks
View publicize_methods.rb
class Class
def publicize_methods
@_saved_private_instance_methods = self.private_instance_methods
self.class_eval { public *@_saved_private_instance_methods }
if block_given?
View user_form.html
Name: <input type="text" name="name"/>
Age: <input type="text" name="age"/>
<input type="submit" value="Submit"></input>
You can’t perform that action at this time.