Jesse Waites jessewaites

I'm hunting for the best solution on how to handle keeping large sets of DB records "sorted" in a performant manner.

Problem Description

Most of us have work on projects at some point where we have needed to have ordered lists of objects. Whether it be a to-do list sorted by priority, or a list of documents that a user can sort in whatever order they want.

A traditional approach for this on a Rails project is to use something like the acts_as_list gem, or something similar. These systems typically add some sort of "postion" or "sort order" column to each record, which is then used when querying out the records in a traditional order by position SQL query.

This approach seems to work fine for smaller datasets, but can be hard to manage on large data sets with hundreds (or thousands) of records needing to be sorted. Changing the sort position of even a single object will require updating every single record in the database that is in the same sort group. This requires potentially thousands of wri

#Introduction

Developing Chrome Extensions is REALLY fun if you are a Front End engineer. If you, however, struggle with visualizing the architecture of an application, then developing a Chrome Extension is going to bite your butt multiple times due the amount of excessive components the extension works with. Here are some pointers in how to start, what problems I encounter and how to avoid them.

Note: I'm not covering chrome package apps, which although similar, work in a different way. I also won't cover the page options api neither the new brand event pages. What I explain covers most basic chrome applications and should be enough to get you started.

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

A simple CSS Card Flip

Just wanted to try out a simple css flip. This was also my first time using Bourbon, but it certainly will not be my last. I will use it on all future projects.

A Pen by Mandy Thomson on CodePen.

License.

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

\

	#!/usr/local/bin/python
	"""
	To use this script, you must be in the root directory of a Rails project that
	is using git. You should also make sure that your directory does not contain any
	uncommitted changes. Then run:

	$ python rails_switch_branch.py name_of_another_branch

	Running the above will do the following:


	# This will guess the User class
	Factory.define :user do
	first_name 'John'
	last_name 'Doe'
	admin false
	end

	# This will use the User class (Admin would have been guessed)
	Factory.define :admin, :class => User do \|u\|

	# This is a skeleton for testing models including examples of validations, callbacks,
	# scopes, instance & class methods, associations, and more.
	# Pick and choose what you want, as all models don't NEED to be tested at this depth.
	#
	# I'm always eager to hear new tips & suggestions as I'm still new to testing,
	# so if you have any, please share!
	#
	# This skeleton also assumes you're using the following gems:
	#
	# rspec-rails: https://github.com/rspec/rspec-rails

	json = ActiveSupport::JSON.decode(File.read('db/seeds/countries.json'))

	json.each do \|a\|
	Country.create!(a['country'], without_protection: true)
	end

	<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
	<script type="text/javascript" >
	$(window).load(function() {
	$("#navFill").height($("#contentWrapper").height()-558);
	});

	var kkeys = [], konami = "38,38,40,40,37,39,37,39,66,65";

	$(document).keydown(function(e) {
	kkeys.push( e.keyCode );