ole

The dynamic wallpaper in MacOS Mojave is a single 114 MB .heic file that seems to contain 16 embedded images.

It also contains the following binary plist data in its metadata under the key "Solar". It's an array of 16 items, each with four keys:

• i (integer). This seems to be the image index.
• o (integer). This is always 1 or 0. Stephen Radford thinks it indicates dark mode (0) vs. light mode (1).
• a (decimal). I’m pretty sure this is the angle of the sun over the horizon. 0º = sunset/sunrise. 90º = sun directly overhead. Negative values = sun below horizon.
• z (decimal). This seems to be the cardinal position of the sun relative to the camera. 0º = sun is directly in front of the camera. 90º = sun is directly to the right of the camera. 180º = sun is directly behind the camera.

mnot

Edward Snowden at IETF 93

Edward Snowden answered questions after a showing of CITIZENFOUR at the IETF93 meeting; this is a transcript of the video recording.

For more information, see the Internet Society article.

• Introduction
• Scale of Pervasive Monitoring
• Returning to the US
• Preserving the Internet

pochmann

def sim(alg):
    state = "UF UR UB UL DF DR DB DL FR FL BR BL UFR URB UBL ULF DRF DFL DLB DBR".split()
    for move in alg.split():
        perm = "FLBR FRBL FDBU FUBD URDL ULDR".split()['UDLRFB'.index(move[0])]
        n = 2 + "2'".find(move[-1])
        table = str.maketrans(perm, perm[n:] + perm[:n])
        state = [p.translate(table) if move[0] in p else p for p in state]
    return state

print(sim("D L2 B2 L2 R2 F2 R2 U2 R2 D' U' R' B F L' D R2") == sim("U R B F L D R2"))

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

dergachev

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:

jussi-kalliokoski

(function(g){

var urlPath =
	window.URL ? 'URL' :
	window.webkitURL ? 'webkitURL' :
	window.mozURL ? 'mozURL' :
	window.msURL ? 'msURL' :
	window.oURL ? 'oURL' : '';

var blobPath =

mathiasbynens

#!/bin/bash

if [ "$1" = "-h" -o "$1" = "--help" -o -z "$1" ]; then cat <<EOF
appify v3.0.1 for Mac OS X - http://mths.be/appify
Creates the simplest possible Mac app from a shell script.

Appify takes a shell script as its first argument:

    `basename "$0"` my-script.sh