christianp

javascript:(function() {function textNodesUnder(el){   var n, a=[], walk=document.createTreeWalker(el,NodeFilter.SHOW_TEXT,null,false);   while(n=walk.nextNode()) a.push(n);   return a; }; var nodes=textNodesUnder(document.body);  var lowercase = 'a-zàèìòùáéíóúýâêîôûãñõäëïöüÿçßøåæœ'; var uppercase = 'A-ZÀÈÌÒÙÁÉÍÓÚÝÂÊÎÔÛÃÑÕÄËÏÖÜŸÇØÅÆ';  var one_name = '['+uppercase+']['+lowercase+']+\\.?';  var re_name = new RegExp('((?:(?:'+one_name+'(?:-'+one_name+')*|(?:['+uppercase+']\\.)+)(?: (?:(?:['+uppercase+']\\.)+|'+one_name+'(?:-'+one_name+')*))* (?:(?:de|von|van|ibn) |(?:ibn )?al-|el-|d\')?'+one_name+'(?:-'+one_name+')*)|Euclid|Archimedes|Pythagoras|Brahmagupta|Eudoxus|Fibonacci|Aryabhata|Apollonius|Diophantus|Bháscara|Hipparchus|Archytus|Panini|Aristotle|Pappus|Hippocrates|Thales)','g');  Array.prototype.map.call(nodes,function(n){ n.textContent = n.textContent.replace(re_name,'Mathematician $1')})  })()

christianp

// Numbas version: exam_question_groups
{"name": "Single quote in .exam file", "extensions": [], "resources": [], "navigation": {"showfrontpage": false, "preventleave": false, "allowregen": true}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"statement": "<p>it's OK</p>", "variablesTest": {"maxRuns": 100, "condition": ""}, "extensions": [], "rulesets": {}, "variables": {}, "functions": {}, "metadata": {"licence": "None specified", "description": ""}, "preamble": {"css": "", "js": ""}, "name": "Single quote in .exam file", "tags": [], "parts": [], "variable_groups": [], "ungrouped_variables": [], "advice": ""}]}]}

christianp

christianp

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);