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tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

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One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

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import matplotlib.pyplot as plt                                                                                                                                                                     
from mpl_toolkits.mplot3d import Axes3D

xs = [10, 20] 
ys = [1250.0, 250.0]
zs = [1, 2]

fig = plt.figure()
ax  = fig.add_subplot(111, projection = '3d')

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from mpl_toolkits.mplot3d import Axes3D 
import mpl_toolkits.mplot3d.art3d as art3d


fig = plt.figure()
ax=fig.gca(projection='3d')

for i in ["x","y","z"]:
  circle = Circle((0, 0), 1)
  circle.set_clip_box(ax.bbox)

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/*
    a   
   / \ 
  b   d   
  |
  c
  |
  e
*/

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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:

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UPDATE: A better way! (August 2015)

As pointed out by @johntyree in the comments, using git reflog is easier and more reliable. Thanks for the suggestion!

 $ git reflog
1ed7510 HEAD@{1}: checkout: moving from develop to 1ed7510
3970d09 HEAD@{2}: checkout: moving from b-fix-build to develop
1ed7510 HEAD@{3}: commit: got everything working the way I want
70b3696 HEAD@{4}: commit: upgrade rails, do some refactoring

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#!/bin/bash
# http://jcornuz.wordpress.com/2007/10/10/workflow-3-quick-raw-converting-batch/
 
# processes raw files
for f in *.CR2;
do
        echo "Processing $f"
        ufraw-batch \
                --wb=camera \
                --out-type=jpeg \

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import java.util.LinkedList;
import java.util.ListIterator;

public class ObjPass {
	public static void change_int(Integer i) {
		i = 1000;
	}

	public static void change_string(String a) {
		a = "changed";