James Newton blackslate

Setting up your laptop for web development

Nautilus

Open a Terminal window

Ctrl-Alt-T
Right click in desktop window; choose Open In Terminal

Maze with locked doors

In this gist model of the maze, you can reach room D by following the path A→B→C→A, picking up the key for room D in room B. However it is not possible to reach room F, since the key to room F is in room E, and the key to room E is in room D, and there is no way back from room D to room A, so room E is inaccessible. (Finding the HIDDEN door from room D to room C would make this possible.)

Is it possible to create queries which take into account the keys that can be picked up on the way? For example:

Is it possible to get from room X to room Y?

	/**
	* This gist provides a simple solution for dragging an HTML element
	* with a mouse or on a touch screen. It includes a fix for an issue
	* specific to React.
	*
	* See [plain js implementation](https://github.com/blackslate/draggable/)
	* [demo](https://blackslate.github.io/draggable/)
	*
	* See [React implementation](https://github.com/blackslate/draggable-react/)
	* [demo](https://blackslate.github.io/draggable-react/)

	<!-- Demo: http://codepen.io/anon/pen/MKWrOr -->

	<!DOCTYPE html>
	<html>

	<head>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r73/three.js"></script>
	<style>
	body {
	margin: 0;

	<!-- Demo: http://lexogram.com/clara/trackballCamera/ -->

	<!DOCTYPE html>
	<html>

	<head>
	<title>THREE.JS WORLD</title>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r73/three.js"></script>
	<style>
	body {

	THREE.Ray.prototype.closestPointToRay = function (that, details) {
	// that: THREE.Ray()
	// details: (optional) object
	// { pointOnThisRay: <THREE.Vector3>
	// , pointOnThatRay: <THREE.Vector3>
	// , midPoint: <THREE.Vector3>
	// , distanceBetweenClosestPoints: <float>
	// }
	// For an explanation of the vector mathematics, see:
	// http://morroworks.com/Content/Docs/Rays%20closest%20point.pdf

	<!DOCTYPE html>
	<html>

	<head>
	<title>THREE.JS WORLD</title>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r73/three.js"></script>
	<style>
	body {
	/* set margin to 0 and overflow to hidden, to
	use the complete page */

	<html>
	<head>
	<meta charset="utf-8">
	<meta http-equiv="x-ua-compatible" content="ie=edge">
	<title>Pixipedia</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<script src="https://code.jquery.com/jquery-2.1.4.js"></script>
	<script>window.lightningjs\|\|function(c){function g(b,d){d&&(d+=(/\?/.test(d)?"&":"?")+"lv=1");c[b]\|\|function(){var i=window,h=document,j=b,g=h.location.protocol,l="load",k=0;(function(){function b(){a.P(l);a.w=1;c[j]("_load")}c[j]=function(){function m(){m.id=e;return c[j].apply(m,arguments)}var b,e=++k;b=this&&this!=i?this.id\|\|0:0;(a.s=a.s\|\|[]).push([e,b,arguments]);m.then=function(b,c,h){var d=a.fh[e]=a.fh[e]\|\|[],j=a.eh[e]=a.eh[e]\|\|[],f=a.ph[e]=a.ph[e]\|\|[];b&&d.push(b);c&&j.push(c);h&&f.push(h);return m}; return m};var a=c[j]._={};a.fh={};a.eh={};a.ph={};a.l=d?d.replace(/^\/\//,(g=="https:"?g:"http:")+"//"):d;a.p={0:+new Date};a.P=function(b){a.p[b]=new Date-a.p[0]};a.w&&b();i.addEventListener?i.addEventListener(l,b,!1):i.attachEvent("on