runemadsen

Polymorphic Associations reversed

It's pretty easy to do polymorphic associations in Rails: A Picture can belong to either a BlogPost or an Article. But what if you need the relationship the other way around? A Picture, a Text and a Video can belong to an Article, and that article can find all media by calling @article.media

This example shows how to create an ArticleElement join model that handles the polymorphic relationship. To add fields that are common to all polymorphic models, add fields to the join model.

henrik

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

mbbx6spp

Software Firms Using Haskell

• Galois according to Haskell in Industry wiki page
• Bump according to their blog
• Silk App according to their blog
• MailRank which was bought by Facebook recently. See their list of mostly Haskell open source projects.
• Tupil according to their 'Building Commercial Haskell Applications'
• TypLAB according to Haskell in Industry wiki page

amtal

-- | Complete abstract description of the DCPU-16 instruction set.
--
-- Based on Version 1.1 of the DCPU-16 Specification by Mojang, retrieved from 0x10c.com.
--
-- Contains a trivial "Label" extension, which isn't present in machine code
-- but is useful for dealing with assembly.
module DCPU16.Instructions where
import Data.Word hiding (Word)
import Data.ByteString

jexchan

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

rakhmad

Setting Up Clojure on OS X

I spent a lot of time trying to find a pretty optimal (for me) setup for Clojure… at the same time I was trying to dive in and learn it. This is never optimal; you shouldn't be fighting the environment while trying to learn something.

I feel like I went through a lot of pain searching Google, StackOverflow, blogs, and other sites for random tidbits of information and instructions.

This is a comprehensive "what I learned and what I ended up doing" that will hopefully be of use to others and act as a journal for myself if I ever have to do it again. I want to be very step-by-step and explain what's happening (and why) at each step.

Step 1: Getting Clojure (1.3)

geelen

window.stoppingPropagation = (callback) -> (e) ->
  e.stopPropagation()
  callback(e)
  
angular.module('myApp',[]).directive 'ngTap', ->
  (scope, element, attrs) ->
    tapping = false
    element.bind 'touchstart', stoppingPropagation (e) -> tapping = true
    element.bind 'touchmove', stoppingPropagation (e) -> tapping = false
    element.bind 'touchend', stoppingPropagation (e) -> scope.$apply(attrs['ngTap']) if tapping

marktheunissen

This playbook has been removed as it is now very outdated.

niallo

/*
 * parse_link_header()
 *
 * Parse the Github Link HTTP header used for pageination
 * http://developer.github.com/v3/#pagination
 */
function parse_link_header(header) {
  if (header.length == 0) {
    throw new Error("input must not be of zero length");
  }

actsasgeek

require 'generator'

samples = [
  { :xs => [ 1.0, 0.25], :y => 0.98},
  { :xs => [ 1.0, 0.49], :y => 0.82},
  { :xs => [ 1.0, 0.60], :y => 0.41},
  { :xs => [ 1.0, 0.89], :y => 0.31}
]

# line is the sum of the dot product of the weight (thetas)