leommoore

File Magic Numbers

Magic numbers are the first bits of a file which uniquely identify the type of file. This makes programming easier because complicated file structures need not be searched in order to identify the file type.

For example, a jpeg file starts with ffd8 ffe0 0010 4a46 4946 0001 0101 0047 ......JFIF.....G ffd8 shows that it's a JPEG file, and ffe0 identify a JFIF type structure. There is an ascii encoding of "JFIF" which comes after a length code, but that is not necessary in order to identify the file. The first 4 bytes do that uniquely.

This gives an ongoing list of file-type magic numbers.

Image Files

domenic

Auto-deploying built products to gh-pages with GitHub Actions

This is a set up for projects which want to check in only their source files, but have their gh-pages branch automatically updated with some compiled output every time they push.

A file below this one contains the steps for doing this with Travis CI. However, these days I recommend GitHub Actions, for the following reasons:

• It is much easier and requires less steps, because you are already authenticated with GitHub, so you don't need to share secret keys across services like you do when coordinate Travis CI and GitHub.
• It is free, with no quotas.
• Anecdotally, builds are much faster with GitHub Actions than with Travis CI, especially in terms of time spent waiting for a builder.

gabrieljenik

Tutorial: Meteor on Windows using Vagrant

Requirements

Before doing anything else, install those:

• VirtualBox: https://www.virtualbox.org/wiki/Downloads
• Vagrant: https://www.vagrantup.com/downloads.html
• git: http://git-scm.com/download/win

ilyazub

Excel 2003 XML Spreadsheet example

Example

spreadsheet.xml

Solved errors

Problem During Load because of wrong ss:ExpandedRowCount.

jacobrossi

//Code to create a list of touches called pointerList
 
var pointerList = []; //Array of all the pointers on the screen
window.addEventListener("pointerdown", updatePointer, true);
window.addEventListener("pointermove", updatePointer, true);
window.addEventListener("pointerup", remPointer, true);
window.addEventListener("pointercancel", remPointer, true);
 
function updatePointer(e) { 
  if(e.pointerType === "touch") {

vinceallenvince

CI with Travis, GitHub Releases API and gh-pages

When hosting a project on GitHub, it's likely you'll want to use GitHub Pages to host a public web site with examples, instructions, etc. If you're not using a continuous integration service like Travis, keeping your gh-pages site up to date requires continuous wrangling.

The steps below outline how to use Travis CI with GitHub Releases and GitHub Pages to create a "1-button" deployment workflow. After testing and running a release build, Travis will upload your release assets to GitHub. It will also push a new version of your public facing site to GitHub Pages.

Organize your project

Let's assume you are hosting a JavaScript project that will offer a single JavaScript file as a release asset. It's likely you'll organize your files like this.

lsegal

function anagram(word) {
  var originalWord = wordObject(word);

  return {
    matches: function(wordArray) {
      if (typeof wordArray === 'string'){
        wordArray = Array.prototype.slice.call(arguments);
      }

      var wordMatches = [];

indexzero

Copyright (c) 4-digit year, Company or Person's Name

Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Source: http://opensource.org/licenses/ISC

timo22345

<!doctype html>
<html>
<title>Flatten.js, General SVG Flattener</title>

<head>
  <script>
/*
Random path and shape generator, flattener test base: https://jsfiddle.net/fjm9423q/embedded/result/
Basic usage example: https://jsfiddle.net/nrjvmqur/embedded/result/

faraday

/** CENG466 HW1 - 2006/2007 - 1st Semester
*
* - Team -
* Cagatay Calli
* Felix Wolfsteller
*
* - Summary -
* Implemented an original adaptation of Selective Gaussian Blur (SGBNR)
*(given name: Varying Multi-pass Isotropic Selective Gaussian Blur, VMISGB), 
* using a Gaussian mask having double type values.