anguyen8

#!/bin/bash

# Anh Nguyen <[email protected]>
# 2016-04-30
# MIT License

# This script takes in same-size images from a folder and make a crossfade video from the images using ffmpeg.
# Make sure you have ffmpeg installed before running.

# The output command looks something like the below, but for as many images as you have in the folder.

non

What is the appeal of dynamically-typed languages?

Kris Nuttycombe asks:

I genuinely wish I understood the appeal of unityped languages better. Can someone who really knows both well-typed and unityped explain?

I think the terms well-typed and unityped are a bit of question-begging here (you might as well say good-typed versus bad-typed), so instead I will say statically-typed and dynamically-typed.

I'm going to approach this article using Scala to stand-in for static typing and Python for dynamic typing. I feel like I am credibly proficient both languages: I don't currently write a lot of Python, but I still have affection for the language, and have probably written hundreds of thousands of lines of Python code over the years.

ryanmaclean

# This script changes the Apple Mac OSX wallpaper in 10.10 for the current user
# to Earth Horizon - feel free to set a different JPEG or download, then set it!
# Cribbed from this answer: http://stackoverflow.com/a/2119076
#
osascript -e 'tell application "Finder" to set desktop picture to POSIX file "/Library/Desktop Pictures/Earth Horizon.jpg"'

andreyvit

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

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

davisagli

import inspect

def marmoset_patch(func, s, r):
    source = inspect.getsource(func).replace(s, r)
    exec source in func.func_globals
    func.func_code = func.func_globals[func.__name__].func_code

def foo():
    print 1
    print 2