foysavas

def is_ajax_request?
  if respond_to? :content_type
    if request.xhr?
      true
    else
      false
    end
  else
    false
  end

jasonrudolph

# generate a fresh app
rails -v
rails new whizbang
cd whizbang

# show empty log file
cat log/production.log 

# script/runner successfully writes to the log file
./script/rails runner 'Rails.logger.error("Hello from script/runner")' -e production

dcsg

// add the filter to your application module
angular.module('yourAppName', ['filters']);

/**
 * Truncate Filter
 * @Param string
 * @Param int, default = 10
 * @Param string, default = "..."
 * @return string
 */

nijikokun

  var user = {
    validateCredentials: function (username, password) {
      return (
          (!(username += '') || username === '') ? { error: "No Username Given.", field: 'name' }
        : (!(username += '') || password === '') ? { error: "No Password Given.", field: 'pass' }
        : (username.length < 3)                  ? { error: "Username is less than 3 Characters.", field: 'name' }
        : (password.length < 4)                  ? { error: "Password is less than 4 Characters.", field: 'pass' }
        : (!/^([a-z0-9_-]+)$/i.test(username))   ? { error: "Username contains invalid characters.", field: 'name' }
        : false
      );

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

esmevane

class Example.Views.Table extends Backbone.View
  template:   JST['example/table']

  initialize: ->
    _.bindAll @, 'addOne', 'addAll'

    @collection.on 'add',     @addOne

  render: ->
    @$el.html @template()

peterudo

var config = exports;

// Then add `testHelpers` to the config to include it:
config["Browser tests"] = {
    // Your own custom config here....
    // ...
    
    // Expose the resources so we can fetch them with ajax
    // Bad practice to use it as generic as this?
    resources: [

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

domenic

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

arvearve

Mathematics: What do grad students in math do all day?

by Yasha Berchenko-Kogan

A lot of math grad school is reading books and papers and trying to understand what's going on. The difficulty is that reading math is not like reading a mystery thriller, and it's not even like reading a history book or a New York Times article.

The main issue is that, by the time you get to the frontiers of math, the words to describe the concepts don't really exist yet. Communicating these ideas is a bit like trying to explain a vacuum cleaner to someone who has never seen one, except you're only allowed to use words that are four letters long or shorter.

What can you say?