lkfken’s gists

lkfken / cream_and_sugar.rb

Created January 6, 2012 20:14 — forked from joshuaclayton/cream_and_sugar.rb

	require "money"

	class Decorator < BasicObject
	undef_method :==

	def initialize(component)
	@component = component
	end

	def method_missing(name, *args, &block)

lkfken / gist:2967945

Created June 21, 2012 19:25

Verify the unpack string

	require 'terminal-table'

	def unpack_str_table(unpack_str, data = nil)
	len = unpack_str.scan(/\d+/)
	sum = 0; idx = 1
	fields = len.map { \|x\| sum += x.to_i }
	headings = %w( Index Length Start End )
	headings << "Data" unless data.nil?
	table = Terminal::Table.new :headings => headings
	fields.each do \|stop\|

lkfken / gist:2974896

Created June 22, 2012 20:10

Simplest Possible Ruby Web Server: Using Rack for a one-liner

	#credit to: http://phrogz.net/simplest-possible-ruby-web-server
	ruby -rrack -e "include Rack;Handler::Thin.run Builder.new{run Directory.new''}"

lkfken / gist:3014516

Created June 28, 2012 22:54

Random URL-safe tokens with SecureRandom

	require 'securerandom'
	SecureRandom.urlsafe_base64(8)

lkfken / Gemfile

Created November 3, 2015 22:30

Using JDBC & Sequel to connect to SQLite3

	source 'https://rubygems.org'
	gem 'jdbc-sqlite3', :platform => :jruby
	gem 'sequel'

lkfken / app.rb

Created November 3, 2015 22:41

Sequel #with_recursive CTE

	DB = Sequel.connect('jdbc:sqlite::memory:')

	DB.create_table(:categories) do
	Integer :id, :primary_key => true
	foreign_key :parent_id, :categories
	String :name, :null => false
	end
	DB[:categories].import([:id, :parent_id, :name], [[1, nil, 'GPS'], [2, 1, 'Vehicle GPS'], [3, 1, 'Handheld GPS'], [4, nil, 'GPS Accessories']])

	DB.create_table(:products) do

lkfken / bcrypt_example.rb

Created June 11, 2016 00:41

Ruby BCrypt example

	require 'bcrypt'
	require 'pp'

	secret = 'my password'

	BCrypt::Engine.cost = 4 # default is 10
	password = BCrypt::Password.create(secret)

	puts '******** create ********'
	puts ['version:', password.version].join(' ')

lkfken / sequel_sqlite_example.rb

Last active July 25, 2016 01:18

Convert CSV to Sqlite records.

	require 'sequel'
	require 'csv'

	csv_records = CSV.read('records.csv')

	DB = Sequel.connect('jdbc:sqlite::memory:')

	DB.create_table(:records) do
	Integer :id, :primary_key => true
	String :member_id, :null => false

lkfken / vlc_d100.rb

Last active December 1, 2017 17:34

save audio stream to .m4a file using VLC

	require 'uri'
	require 'pp'
	require 'pathname'

	url = URI('http://66.55.135.155:8000/Channel1')

	##### VLC #####
	stop_time = ARGV.shift # duration in secords
	abort 'no stop tiime defined' unless stop_time

lkfken / extract_year.rb

Created March 28, 2017 23:36

Sequel: add modulus support

	ds_1 = People.select(:birth).select_append{year(:birth).as(:year)}
	ds_1.first ##<Member @values={:birth=>1980-09-15 00:00:00 -0700, :year=>1980}>

	ds_2 = People.select(:birth).select_append{(year(:birth) % 100 ).as(:year)}

	# ds_2.first
	# NoMethodError: undefined method `%' for #<Sequel::SQL::Function @name=>:year, @opts=>{}, @args=>[:birth]>

	# Mostly because it is less common. It's defined in BitwiseMethods, which is only included in NumericExpression by default.
	# Some of the BitwiseMethods overlap with the BooleanMethods that are included in GenericExpression.