epitron

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

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?

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

ruby-1.9.3-p327 cumulative performance patch for rbenv

This installs a patched ruby 1.9.3-p327 with various performance improvements and a backported COW-friendly GC, all courtesy of funny-falcon.

Requirements

You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and brew install autoconf using homebrew.

	# you can make a text file of request times (in ms, one number per line) and import it here, or you can use a probability distribution to simulate request times (see below where setting req_durations_in_ms)
	# rq = read.table("~/Downloads/request_times.txt", header=FALSE)$V1

	# argument notes:
	# parallel_router_count is only relevant if router_mode is set to "intelligent"
	# choice_of_two, power_of_two, and unicorn_workers_per_dyno are only relevant if router_mode is set to "naive"
	# you can only select one of choice_of_two, power_of_two, and unicorn_workers_per_dyno

	run_simulation = function(router_mode = "naive",
	reqs_per_minute = 9000,

	#!/usr/bin/env ruby

	# grd: micro Guard.
	#
	# Watch one or more filename patterns and then run the given command every time
	# something changes.
	#
	# Example:
	# grd my_model "rspec spec/models/my_model_spec.rb"

	# config/initializers/source_maps.rb

	if Rails.env.development?
	require 'open3'
	module CoffeeScript
	class SourceMapError < StandardError; end;

	class << self

	def map_dir

	$stack, $draws = [], {}

	def method_missing *args
	return if args[0][/^to_/]
	$stack << args.map { \|a\| a or $stack.pop }
	$draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :<
	end

	class Array
	def +@

	require 'epitools'

	class State

	attr_accessor :fore, :back, :attrs

	COLORS = [:black, :red, :green, :yellow, :blue, :magenta, :cyan, :white]

	ATTRS = {
	0 => :reset,

	#!/usr/bin/env ruby

	require 'socket'
	require 'openssl'
	require "base64"

	server = "some-irc.tld"
	port = "6667"
	nick = "Nickname#{rand(5000)}"
	channel = "#channel"