Guillermo Garza ggarza

Max Battery Life Checklist

Here is a checklist to follow if you want maximum battery life -- for instance if you're about to get on a long plane flight.

Low power use checklist

With power connected:

Since this is on Hacker News and reddit...

No, I don't distribute my résumé like this. A friend of mine made a joke about me being the kind of person who would do this, so I did (the link on that page was added later). My actual résumé is a good bit crazier.
I apologize for the use of _t in my types. I spend a lot of time at a level where I can do that; "reserved for system libraries? I am the system libraries".
Since people kept complaining, I've fixed the assignments of string literals to non-const char *s.
My use of type * name, however, is entirely intentional.
If you're using an older compiler, you might have trouble with the anonymous unions and the designated initializers - I think gcc 4.4 requires some extra braces to get them working together. Anything reasonably recent should work fine. Clang and gcc (newer than 4.4, at le

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?

	#!/usr/bin/env bash
	#
	# url : https://gist.github.com/672684
	# version : 2.0.2
	# name : appify
	# description : Create the simplest possible mac app from a shell script.
	# usage : cat my-script.sh \| appify MyApp
	# platform : Mac OS X
	# author : Thomas Aylott <[email protected]>

	"
	" While editing a Markdown document in Vim, preview it in the
	" default browser.
	"
	" Author: Nate Silva
	"
	" To install: Place markdown.vim in ~/.vim/ftplugin or
	" %USERPROFILE%\vimfiles\ftplugin.
	"
	" To use: While editing a Markdown file, press ',p' (comma p)

	################################################################################
	# Copyright 2011
	# Andrew Redd
	# 11/23/2011
	#
	# Description of File:
	# Makefile for knitr compiling
	#
	################################################################################
	all:pdf # default rule DO NOT EDIT

	## See http://en.wikipedia.org/wiki/Birthday_problem for an explanation of the problem
	require(ggplot2)
	require(reshape)

	theme_update(panel.background=theme_blank(),
	panel.grid.major=theme_blank(),
	panel.border=theme_blank())

	birthday <- function(n) {
	1 - exp( - n^2 / (2 * 365) )

	require 'formula'

	class Pdftk < Formula
	url 'http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/pdftk-1.44-src.zip'
	homepage 'http://www.pdflabs.com/'
	md5 '9eb50fffcd621a627d387750c60982b4'

	depends_on 'gcc' # with "--enable-java" option , required "Homebrew-alt" .
	# via : https://github.com/adamv/homebrew-alt/
	def install

	This post examines the features of [R Markdown](http://www.rstudio.org/docs/authoring/using_markdown)
	using [knitr](http://yihui.name/knitr/) in Rstudio 0.96.
	This combination of tools provides an exciting improvement in usability for
	[reproducible analysis](http://stats.stackexchange.com/a/15006/183).
	Specifically, this post
	(1) discusses getting started with R Markdown and `knitr` in Rstudio 0.96;
	(2) provides a basic example of producing console output and plots using R Markdown;
	(3) highlights several code chunk options such as caching and controlling how input and output is displayed;
	(4) demonstrates use of standard Markdown notation as well as the extended features of formulas and tables; and
	(5) discusses the implications of R Markdown.

	RMDFILE=demo-rmd-pandoc
	PANDOC=~/.cabal/bin/pandoc

	all:
	Rscript -e "require(knitr); require(markdown); knit('$(RMDFILE).rmd', '$(RMDFILE).md'); purl('$(RMDFILE).rmd')"
	${PANDOC} --mathjax --toc -B header.html -A footer.html --bibliography refs.bib --css markdown.css -s $(RMDFILE).md -o $(RMDFILE).html