bluemont

class UrlValidator < ActiveModel::EachValidator

  def validate_each(record, attribute, value)
    valid = begin
      URI.parse(value).kind_of?(URI::HTTP)
    rescue URI::InvalidURIError
      false
    end
    unless valid
      record.errors[attribute] << (options[:message] || "is an invalid URL")

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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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.

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tomysmile

Installing memcached on Mac with Homebrew and Lunchy

This is a quick guide for installing memcached on a Mac with Homebrew, and starting and stopping it with Lunchy. I hope this tutorial will get your memcached up and running in no time.

Step 1 — Install Homebrew

Installing Homebrew is super easy. Just paste this in your terminal —

$ ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"