I've tried several way to try to randomize these quiz questions using math random as a function but I'm afraid I'm too much of a novice to understand what I'm doing wrong. How would I be able to randomize these questions from this quiz?
Is there a simple way to make the questions into an array and then randomizing them as they appear on the browser? I only put two questions in this example to make it easier but can potentially put a lot more.
var quiztitle = "Computer Hardware: Visual Quiz!";
/**
* Set the information about your questions here. The correct answer string needs to match
* the correct choice exactly, as it does string matching. (case sensitive)
*
*/
var quiz = [{
"question": "Q1: What is the name of this game?",
"image": "https://lh3.googleusercontent.com/N6XB3KXpnQ4OAz5jDJi74XM8dvwfJxiwrObSLpd7hdy3HzCxW-cZY0Mu5hJORtjeqa0=h900",
"choices":[
"Minecraft",
"Call of Duty",
"Doom",
"Toca Boca"
],
"correct": "Minecraft",
"explanation": "It is a picture of zombies in minecrsft!",
}, {
"question": "Q2: What game is this?",
"image": "https://assets.vg247.com/current//2015/03/crossy_road_header_1.jpg",
"choices": [
"Run sackboy",
"Call of Duty",
"Minecraft",
"Crossy road"
],
"correct": "Crossy road",
"explanation": "A picture of the signiture chicken running across the road",
},
];
/******* No need to edit below this line *********/
var currentquestion = 0,
score = 0,
submt = true,
picked;
jQuery(document).ready(function($) {
/**
* HTML Encoding function for alt tags and attributes to prevent messy
* data appearing inside tag attributes.
*/
function htmlEncode(value) {
return $(document.createElement('div')).text(value).html();
}
/**
* This will add the individual choices for each question to the ul#choice-block
*
* @param {choices} array The choices from each question
*/
function addChoices(choices) {
if (typeof choices !== "undefined" && $.type(choices) == "array") {
$('#choice-block').empty();
for (var i = 0; i < choices.length; i++) {
$(document.createElement('li')).addClass('choice choice-box').attr('data-index', i).text(choices[i]).appendTo('#choice-block');
}
}
}
/**
* Resets all of the fields to prepare for next question
*/
function nextQuestion() {
submt = true;
$('#explanation').empty();
$('#question').text(quiz[currentquestion]['question']);
$('#pager').text('Question ' + Number(currentquestion + 1) + ' of ' + quiz.length);
if (quiz[currentquestion].hasOwnProperty('image') && quiz[currentquestion]['image'] != "") {
if ($('#question-image').length == 0) {
$(document.createElement('img')).addClass('question-image').attr('id', 'question-image').attr('src', quiz[currentquestion]['image']).attr('alt', htmlEncode(quiz[currentquestion]['question'])).insertAfter('#question');
} else {
$('#question-image').attr('src', quiz[currentquestion]['image']).attr('alt', htmlEncode(quiz[currentquestion]['question']));
}
} else {
$('#question-image').remove();
}
addChoices(quiz[currentquestion]['choices']);
setupButtons();
}
/**
* After a selection is submitted, checks if its the right answer
*
* @param {choice} number The li zero-based index of the choice picked
*/
function processQuestion(choice) {
if (quiz[currentquestion]['choices'][choice] == quiz[currentquestion]['correct']) {
$('.choice').eq(choice).css({
'background-color': '#50D943'
});
$('#explanation').html('<strong>Correct!</strong> ' + htmlEncode(quiz[currentquestion]['explanation']));
score++;
} else {
$('.choice').eq(choice).css({
'background-color': '#D92623'
});
$('#explanation').html('<strong>Incorrect.</strong> ' + htmlEncode(quiz[currentquestion]['explanation']));
}
currentquestion++;
$('#submitbutton').html('NEXT QUESTION »').on('click', function() {
if (currentquestion == quiz.length) {
endQuiz();
} else {
$(this).text('Check Answer').css({
'color': '#222'
}).off('click');
nextQuestion();
}
})
}
/**
* Sets up the event listeners for each button.
*/
function setupButtons() {
$('.choice').on('mouseover', function() {
$(this).css({
'background-color': '#e1e1e1'
});
});
$('.choice').on('mouseout', function() {
$(this).css({
'background-color': '#fff'
});
})
$('.choice').on('click', function() {
picked = $(this).attr('data-index');
$('.choice').removeAttr('style').off('mouseout mouseover');
$(this).css({
'border-color': '#222',
'font-weight': 700,
'background-color': '#c1c1c1'
});
if (submt) {
submt = false;
$('#submitbutton').css({
'color': '#000'
}).on('click', function() {
$('.choice').off('click');
$(this).off('click');
processQuestion(picked);
});
}
})
}
/**
* Quiz ends, display a message.
*/
function endQuiz() {
$('#explanation').empty();
$('#question').empty();
$('#choice-block').empty();
$('#submitbutton').remove();
$('#question').text("You got " + score + " out of " + quiz.length + " correct.");
$(document.createElement('h2')).css({
'text-align': 'center',
'font-size': '4em'
}).text(Math.round(score / quiz.length * 100) + '%').insertAfter('#question');
}
/**
* Runs the first time and creates all of the elements for the quiz
*/
function init() {
//add title
if (typeof quiztitle !== "undefined" && $.type(quiztitle) === "string") {
$(document.createElement('h1')).text(quiztitle).appendTo('#frame');
} else {
$(document.createElement('h1')).text("Quiz").appendTo('#frame');
}
//add pager and questions
if (typeof quiz !== "undefined" && $.type(quiz) === "array") {
//add pager
$(document.createElement('p')).addClass('pager').attr('id', 'pager').text('Question 1 of ' + quiz.length).appendTo('#frame');
//add first question
$(document.createElement('h2')).addClass('question').attr('id', 'question').text(quiz[0]['question']).appendTo('#frame');
//add image if present
if (quiz[0].hasOwnProperty('image') && quiz[0]['image'] != "") {
$(document.createElement('img')).addClass('question-image').attr('id', 'question-image').attr('src', quiz[0]['image']).attr('alt', htmlEncode(quiz[0]['question'])).appendTo('#frame');
}
$(document.createElement('p')).addClass('explanation').attr('id', 'explanation').html(' ').appendTo('#frame');
//questions holder
$(document.createElement('ul')).attr('id', 'choice-block').appendTo('#frame');
//add choices
addChoices(quiz[0]['choices']);
//add submit button
$(document.createElement('div')).addClass('choice-box').attr('id', 'submitbutton').text('Check Answer').css({
'font-weight': 700,
'color': '#222',
'padding': '30px 0'
}).appendTo('#frame');
setupButtons();
}
}
init();
});
