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@justintv
justintv / .bashrc
Created August 17, 2009 00:53
Display git branch in bash prompt
# If you work with git, you've probably had that nagging sensation of not knowing what branch you are on. Worry no longer!
export PS1="\\w:\$(git branch 2>/dev/null | grep '^*' | colrm 1 2)\$ "
# This will change your prompt to display not only your working directory but also your current git branch, if you have one. Pretty nifty!
# ~/code/web:beta_directory$ git checkout master
# Switched to branch "master"
# ~/code/web:master$ git checkout beta_directory
# Switched to branch "beta_directory"
@burnto
burnto / gist:1266515
Created October 6, 2011 04:18
OpenCV python webcam example
#!/Users/brent/.virtualenvs/lumber/bin/python
import cv
cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE)
camera_index = 0
capture = cv.CaptureFromCAM(camera_index)
gx = gy = 1
@ryangray
ryangray / buttondown.css
Created February 22, 2012 06:45
A clean, minimal CSS stylesheet for Markdown, Pandoc and MultiMarkdown HTML output.
/*
Buttondown
A Markdown/MultiMarkdown/Pandoc HTML output CSS stylesheet
Author: Ryan Gray
Date: 15 Feb 2011
Revised: 21 Feb 2012
General style is clean, with minimal re-definition of the defaults or
overrides of user font settings. The body text and header styles are
left alone except title, author and date classes are centered. A Pandoc TOC
@jboner
jboner / latency.txt
Last active May 15, 2025 07:53
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@piscisaureus
piscisaureus / pr.md
Created August 13, 2012 16:12
Checkout github pull requests locally

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

@BekeJ
BekeJ / py2tex.py
Last active March 9, 2017 06:41
IPython notebook py2tex
"""
Module for IPython to display code with TeX representation.
This makes for example the following workflow possible:
.. sourcecode:: ipython
In [1]: %load_ext py2tex
In [2]: from math import *
@stepchowfun
stepchowfun / merger.py
Last active July 14, 2024 15:14
My three-way merge algorithm, originally designed for 6.033 DP2.
#!/usr/bin/python -O
################################################################################
################################################################################
#
# State-Based Text Merging Algorithm
# For 6.033 Design Project 2
# TA: Katherine Fang
# 9 May 2012
#
Loading
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Sorry, we cannot display this file.
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@postrational
postrational / gunicorn_start.bash
Last active April 4, 2024 12:48
Example of how to set up Django on Nginx with Gunicorn and supervisordhttp://michal.karzynski.pl/blog/2013/06/09/django-nginx-gunicorn-virtualenv-supervisor/
#!/bin/bash
NAME="hello_app" # Name of the application
DJANGODIR=/webapps/hello_django/hello # Django project directory
SOCKFILE=/webapps/hello_django/run/gunicorn.sock # we will communicte using this unix socket
USER=hello # the user to run as
GROUP=webapps # the group to run as
NUM_WORKERS=3 # how many worker processes should Gunicorn spawn
DJANGO_SETTINGS_MODULE=hello.settings # which settings file should Django use
DJANGO_WSGI_MODULE=hello.wsgi # WSGI module name
@rossant
rossant / raytracing.py
Last active February 19, 2025 01:38
Very simple ray tracing engine in (almost) pure Python. Depends on NumPy and Matplotlib. Diffuse and specular lighting, simple shadows, reflections, no refraction. Purely sequential algorithm, slow execution.
"""
MIT License
Copyright (c) 2017 Cyrille Rossant
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is