kaiwren

require 'net/http'
module Net
  class HTTP
    def self.enable_debug!
      raise "You don't want to do this in anything but development mode!" unless Rails.env == 'development'
      class << self
        alias_method :__new__, :new
        def new(*args, &blk)
          instance = __new__(*args, &blk)
          instance.set_debug_output($stderr)

mathiasbynens

// Original code from http://www.blog.highub.com/mobile-2/a-fix-for-iphone-viewport-scale-bug/

var metas = document.getElementsByTagName('meta');
var i;
if (navigator.userAgent.match(/iPhone/i)) {
	for (i=0; i<metas.length; i++) {
		if (metas[i].name == "viewport") {
			metas[i].content = "width=device-width, minimum-scale=1.0, maximum-scale=1.0";
		}
	}

paulirish

// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

(function() {
    var lastTime = 0;
    var vendors = ['ms', 'moz', 'webkit', 'o'];

coreyhaines

--colour
-I app

mperham

class ActiveRecord::Base
  mattr_accessor :shared_connection
  @@shared_connection = nil

  def self.connection
    @@shared_connection || ConnectionPool::Wrapper.new(:size => 1) { retrieve_connection }
  end
end
ActiveRecord::Base.shared_connection = ActiveRecord::Base.connection

rmurphey

What's wrong with Netmag's "Optimize your JavaScript" post

Update: The original post on Netmag has been updated since this was written.

I tweeted earlier that this should be retracted. Generally, these performance-related articles are essentially little more than linkbait -- there are perhaps an infinite number of things you should do to improve a page's performance before worrying about the purported perf hit of multiplication vs. division -- but this post went further than most in this genre: it offered patently inaccurate and misleading advice.

Here are a few examples, assembled by some people who actually know what they're talking about (largely Rick Waldron and Ben Alman, with some help from myself and several others from the place that shall be unnamed).

Things that are just plain wrong

lokimeyburg

def valid_msp_number(msp_number)
    weights = [0, 2, 4, 8, 5, 10, 9, 7, 3, 0]
    total = 0
    weights.to_enum.with_index(1).each do |weight, i|
      total = total + msp_number[i-1].to_i * weight.to_i
    end
    a = total / 11
    b = a * 11
    c = total - b
    result = 11 - c

maxjustus

# Takes a table name, and an array of hashes where keys are column names and values are values.
# Expects hashes to all contain the same keys.
def bulk_insert(table, rows)
  columns = rows.first.keys

  to_insert = rows.map do |d|
    vals = columns.map {|k| d[k] }
    ActiveRecord::Base.send(:replace_bind_variables, "(#{vals.length.times.collect {'?'}.join(',')})", vals)
  end

thisisbrians

jQuery.fn.selectTimeZone = function() {
 var $el = $(this[0]); // our element
 var offsetFromGMT = String(- new Date('1/1/2009').getTimezoneOffset() / 60); // using 1/1/2009 so we know DST isn't tripping us up
 if (offsetFromGMT[0] != '-') {
  offsetFromGMT = '+' + offsetFromGMT; // if it's not negative, prepend a +
 }
 if (offsetFromGMT.length < 3) {
  offsetFromGMT = offsetFromGMT.substr(0, 1) + '0' + offsetFromGMT.substr(1); // add a leading zero if we need it
 }
 var regEx = new RegExp(offsetFromGMT); // create a RegExp object with our pattern

kixorz

{
  "Statement": [
    {
      "Action": [
        "route53:ChangeResourceRecordSets",
        "route53:GetHostedZone",
        "route53:ListResourceRecordSets"
      ],
      "Effect": "Allow",
      "Resource": [