0sc

require 'openssl'

def encrypt_string(str)
  cipher_salt1 = 'some-random-salt-'
  cipher_salt2 = 'another-random-salt-'
  cipher = OpenSSL::Cipher.new('AES-128-ECB').encrypt
  cipher.key = OpenSSL::PKCS5.pbkdf2_hmac_sha1(cipher_salt1, cipher_salt2, 20_000, cipher.key_len)
  encrypted = cipher.update(str) + cipher.final
  encrypted.unpack('H*')[0].upcase
end

fuglede

swaathi

from collections import defaultdict
class Graph:
    def __init__(self, start, end):
        self.nodes = set()
        self.edges = defaultdict(list)
        self.distances = {}
        self.start = start
        self.end = end

    def add_node(self, value):

andrewlimaza

	<script>
		function printDiv(divName){
			var printContents = document.getElementById(divName).innerHTML;
			var originalContents = document.body.innerHTML;

			document.body.innerHTML = printContents;

			window.print();

			document.body.innerHTML = originalContents;

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

varun-raj

function pullJSON() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheets = ss.getSheets();
  var sheet = ss.getActiveSheet();


  var url="http://example.com/feeds?type=json"; // Paste your JSON URL here
  
   var response = UrlFetchApp.fetch(url); // get feed
  var dataAll = JSON.parse(response.getContentText()); //

mabdrabo

import pyaudio
import wave
 
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100
CHUNK = 1024
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "file.wav"
 

joost

# More robust version to update new or existing counter cache columns in your Rails app.
# See: https://gist.github.com/svyatov/4225663
desc 'Update all cache counters'
task :update_cache_counters => :environment do
  models_to_update = {}

  # or: Rails.application.eager_load!
  # Dir loads less, so it's faster
  Dir.glob(Rails.root.join('app/models/**/*')).each { |model| require model if File.file?(model) }

linjunpop

Rails flash messages with AJAX requests

original: http://stackoverflow.com/a/10167659/656428

jhjguxin

In this article, I'll walk through a basic Rails (3.2.x) setup for creating a nested resource for two models. Nested resources work well when you want to build out URL structure between two related models, and still maintain a RESTful convention. This code assumes you are running RVM to manage Ruby/Gem versions, and Git for version control.

Creating a new Rails project

$ mkdir family # create rvm gemset 
$ echo "rvm use --create ruby-1.9.2@family" > family/.rvmrc 
$ cd family # install rails 
$ gem install rails # create new rails project 
$ rails new . # version control