ryanb

My issues with Modules

In researching topics for RailsCasts I often read code in Rails and other gems. This is a great exercise to do. Not only will you pick up some coding tips, but it can help you better understand what makes code readable.

A common practice to organize code in gems is to divide it into modules. When this is done extensively I find it becomes very difficult to read. Before I explain further, a quick detour on instance_eval.

You can find instance_eval used in many DSLs: from routes to state machines. Here's an example from Thinking Sphinx.

class Article < ActiveRecord::Base

Darksecond

# The only setting we feel strongly about is the fail_timeout=0
# directive in the "upstream" block.  max_fails=0 also has the same
# effect as fail_timeout=0 for current versions of nginx and may be
# used in its place.

# you generally only need one nginx worker unless you're serving
# large amounts of static files which require blocking disk reads
worker_processes 1;

# # drop privileges, root is needed on most systems for binding to port 80

dre1080

# Provide varbinary columns in a Migration.
# Probably a better way to do this?
#
# Usage: 
#     => t.varbinary :column, :limit => 20, ....[options]
#

ActiveRecord::ConnectionAdapters::SchemaStatements.module_eval do
  def type_to_sql_with_varbinary(type, limit = nil, precision = nil, scale = nil)
    return type_to_sql_without_varbinary(type, limit, precision, scale) unless :varbinary == type.to_sym

johnkpaul

//in your application, rather than using window.location to get the current url
App.getLocation = function(){
    return window.location.protocol + '//' + window.location.host 
              + '/' + Backbone.history.options.root + Backbone.history.getFragment()
}

xdite

Speedup Rails Asset Pipeline precompile process

This post is based on my blog post: http://blog.xdite.net/posts/2012/07/09/3-way-to-speedup-asset-pipeline/

Here are my three tips for speedup asset pipeline precompile process:

1. Capistrano deployment speedup
2. Use @import carefully.
3. don’t require .scss & .coffee for no reason

r38y

class ApplicationController < ActionController::Base
  protect_from_forgery
  before_filter do
    @categories = Rails.cache.fetch("global/categories", expires_in: 10.minutes) do
      Category.where("posts_count > 0").all
    end
  end
end

jlong

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"

erikh

#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

technoweenie

module Resque
  def push_with_meta(queue, item)
    if item.respond_to?(:[]=)
      item[:meta] = {:queued_at => Time.now.to_f}
    end
    push_without_meta(queue, item)
  end

  class Job
    # Returns a Hash of the meta data related to this Job.

dhh

class PostsController < ActionController::Base
  def create
    Post.create(post_params)
  end
  
  def update
    Post.find(params[:id]).update_attributes!(post_params)
  end

  private