christianp

<?php

function find_logs_without_strings($str) {
    // this function finds log_<whatever>(, then searches forward until it finds the matching closing bracket.
    // it calls itself on the contents of the brackets, so any nested logs are caught
    // it doesn't deal with strings, or `log10`. It wouldn't be too hard to add, but the resulting code would be UGLY
    $offset = 0;
    $len = strlen($str);
    while($offset<$len) {
        if(preg_match("/log_([\S]+?)\(/",$str,$m,PREG_OFFSET_CAPTURE,$offset)) {

christianp

The following wordsearch grid contains some Christmas words. Clues run either left-to-right or top-to-bottom.
BUT: they've been encrypted! For each clue N+1, the grid is Vigenere-encrypted using clue N as the key.
For example, the first two rows of the grid when decrypted with the key EXAMPLE would be:
X R B X P Y A M M N I G V
S S A E N I D B M D H U C

The first clue is "CHRISTMAS". Find the next clue, and the next, and so on until you find CHRISTMAS in the grid.
As a bonus, each clue has a RED HERRING somewhere else in the grid.

T U B L A N W I P N W R K

christianp

These instructions will create a virtual machine in Vagrant, which runs the Numbas LTI provider proxied through nginx. If you want to run on a real machine, skip the first couple of steps to do with Vagrant. I used Ubuntu 16.04 - the process of installing packages will be different on different versions or different distributions.

I set up Vagrant to forward port 443 on the host machine to port 443 on the VM. I think this might only work on Windows. I'm not sure how to get it running on a different port - I had problems with the nginx proxy.

Create a directory for the vagrant VM:

mkdir numbas_lti

christianp

christianp

christianp

Numbas.addExtension('geogebra',[],function(extension) {
    window.geogebraIdAcc = window.geogebraIdAcc || 0;

    var delay = 10;
    var container;
	$(document).ready(function() {
        container = document.createElement('div');
        container.setAttribute('id','numbasgeogebracontainer');
        container.setAttribute('class','invisible');
        document.body.appendChild(container);

christianp

import Html exposing (..)
import Html.App as Html
import Html.Attributes exposing (..)
import Html.Events exposing (on)
import Json.Decode as Json exposing ((:=))
import Mouse exposing (Position)
import Time exposing (Time, millisecond)
import String
import Task exposing (perform)

christianp

christianp

christianp

function canvasApp() {
    if (!canvasSupport()) {
        return
    }
    ;var canvasOne = document.getElementById("canvasOne");
    var context = canvasOne.getContext("2d");
    setup();
    var vec1;
    var vec2;
    var angle;