sjwilliams

http://cfenollosa.com/misc/tricks.txt

I have marked with a * those which I think are absolutely essential
Items for each section are sorted by oldest to newest. Come back soon for more!

BASH
* In bash, 'ctrl-r' searches your command history as you type
- Input from the commandline as if it were a file by replacing 
  'command < file.in' with 'command <<< "some input text"'
- '^' is a sed-like operator to replace chars from last command 

sjwilliams

#!/bin/sh

# A simple script for remotely rebooting a Ubiquiti UniFi access point
# Version 1.0 (Dec 15, 2015)
# by Steve Jenkins (http://www.stevejenkins.com/)

# Requires sshpass (https://sourceforge.net/projects/sshpass/) which
# is probably available via dnf, yum, or apt on your *nix distro.

# USAGE

sjwilliams

ffmpeg -i intro.mov -vf "boxblur=5:1" intro-blur.mov

sjwilliams

 for filename in *.mp4; do base=${filename#mp4} echo "https://youdomain.com/${filename%.mp4}-900w.mp4";     done

sjwilliams

#!/bin/bash

# https://stackoverflow.com/questions/46145576/stack-multiple-images-in-semitransparent-layers-with-imagemagick

FRAMESDIR=frames
INPUTVIDEO=input.mp4

curl https://cdn.joshwilliams.com/projects/2019/videostack/input.mp4 -o $INPUTVIDEO

mkdir -p $FRAMESDIR

sjwilliams

// Based on pieces from this thread: 
// http://stackoverflow.com/questions/1881716/merging-jquery-objects
// use: var currentRowEls = []; // array of various jQ ojbects
//      $.mergeSelectors(currentRowEls).css({width:'200px'});

(function($){
	$.mergeSelectors = function(objs) {
	    var ret = objs.shift();
	    while (objs.length) {
	        ret = ret.add(objs.shift());

sjwilliams

var shuffleAndValidateFiles = function(files) {
	var F = new Array();
	while (files.length > 0) {
		var N = Math.floor(Math.random()*files.length);

		if ((files[N] instanceof File) && !files[N].hidden) {
			F.push(files[N]);
		}

		files.splice(N,1);

sjwilliams

[].slice.call(document.querySelectorAll('#panel_content_4932_template li')).map(function(el){ return el.textContent.trim();}).filter(function(str){ return /^\S+x\S+$/.test(str) }).forEach(function(str){ var wh = str.split('x'); console.log(str, wh[1]/wh[0]) })

sjwilliams

Sublime Text 2 – Useful Shortcuts (Mac OS X)

General

⌘T	go to file
⌘⌃P	go to project
⌘KB	toggle side bar
⌘⇧P	command prompt
⌃ `	python console
⌘⇧N	new window (useful for new project)

sjwilliams

const isAutoplaySupported = function (callback) {
  var timeout;
  var waitTime = 200;
  var retries = 5;
  var currentTry = 0;
  var elem = document.createElement('video');
  var elemStyle = elem.style;

  function testAutoplay(arg) {
    currentTry++;