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Sass/Less Comparison

In this document I am using Sass's SCSS syntax. You can choose to use the indented syntax in sass, if you prefer it, it has no functional differences from the SCSS syntax.

For Less, I'm using the JavaScript version because this is what they suggest on the website. The ruby version may be different.

Variables

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?

	# An example of elasticsearch & Tire setup for ActiveRecord associations.
	#
	# A `Book has_many :chapters` scenario, with mapping and JSON serialization
	# for indexing associated models.
	#
	# Demonstrates three important caveats as of now:
	#
	# 1. You you have to use `touch: true` in the `belongs_to` declaration,
	# to automatically notify the parent model about the update.
	#

	source :rubygems

	# We are not loading Active Record, nor Active Resources etc.
	# We can do this in any app by simply replacing the rails gem
	# by the parts we want to use.
	gem "actionpack", "~> 3.2"
	gem "railties", "~> 3.2"
	gem "tzinfo"

	# Let's use thin

	# Run with: rake environment elasticsearch:reindex

	namespace :elasticsearch do
	desc "re-index elasticsearch"
	task :reindex => :environment do

	klass = Place
	ENV['CLASS'] = klass.name
	ENV['INDEX'] = new_index = klass.tire.index.name << '_' << Time.now.strftime('%Y%m%d%H%M%S')

	#!/usr/bin/env ruby
	#
	# newrailsproject.rb
	#
	# Description:
	# Easily create a new Rails project and Sublime Text 2 project file.
	#
	# By Jonathan Beebe. MIT License.
	#
	# Syntax: ruby newrailsproject.rb PROJECT_NAME BASE_PATH [sublime_project_basepath]

	// make sure we're using the right db; this is the same as "use aggdb;" in shell
	db = db.getSiblingDB("aggdb");

	// simple projection
	var p1 = db.runCommand(
	{ aggregate : "article", pipeline : [
	{ $project : {
	tags : 1,
	pageViews : 1
	}}

	var fs = require('fs');

	var start_fs = (new Date()).getTime();

	var data = fs.readFileSync('./100_log', 'utf-8');

	var start = (new Date()).getTime();

	var log = data.split('\n').map(function (line) {
	var match = line.match(/\[([^\]]+)\] \[([^\]]+)\] \[([^ ]+) ([^\]]+)\] (.*)/);

	upstream your-app {
	# fail_timeout=0 means we always retry an upstream even if it failed
	# to return a good HTTP response (in case the Unicorn master nukes a
	# single worker for timing out).
	server unix:/tmp/your_app.socket fail_timeout=0;
	}

	server {
	listen 80;

	.DS_Store
	tmp/