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quiz.js
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quiz.js
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var questions = [{
question: "What is the population of Brazil?",
choices: ["145 million", "199 million", "182 million", "205 million"],
correctAnswer: 1
}, {
question: "What is 27*14?",
choices: ["485", "634", "408", "528"],
correctAnswer: 2
}, {
question: "What is the busiest train station in the world?",
choices: ["Grand Central, NY", "Shibuya, Tokyo", "Beijing Central, Chine", "Gard du Nord, Paris"],
correctAnswer: 1
}, {
question: "What is the longest river?",
choices: ["Nile", "Amazon", "Mississippi", "Yangtze"],
correctAnswer: 0
}, {
question: "What is the busiest tube station in the London?",
choices: ["Waterloo", "Baker Street", "Kings Cross", "Victoria"],
correctAnswer: 0
}];
var currentQuestion = 0;
var correctAnswers = 0;
var quizOver = false;
$(document).ready(function () {
// Display the first question
displayCurrentQuestion();
$(this).find(".quizMessage").hide();
// This displays the current question AND the choices
function displayCurrentQuestion() {
var question = questions[currentQuestion].question;
var questionClass = $(document).find(".quizContainer > .question");
var choiceList = $(document).find(".quizContainer > .choiceList");
var numChoices = questions[currentQuestion].choices.length;
// Set the questionClass text to the current question
$(questionClass).text(question);
// Remove all current <li> elements (if any)
$(choiceList).find("li").remove();
var choice;
for (i = 0; i < numChoices; i++) {
choice = questions[currentQuestion].choices[i];
$('<li><input type="radio" value=' + i + ' name="dynradio" />' + choice + '</li>').appendTo(choiceList);
}
}
// On clicking next, display the next question
$(this).find(".nextButton").on("click", function () {
if (!quizOver) {
value = $("input[type='radio']:checked").val();
if (value == undefined) {
$(document).find(".quizMessage").text("Please select an answer");
$(document).find(".quizMessage").show();
} else {
// TODO: Remove any message -> not sure if this is efficient to call this each time....
$(document).find(".quizMessage").hide();
if (value == questions[currentQuestion].correctAnswer) {
correctAnswers++;
}
currentQuestion++; // Since we have already displayed the first question on DOM ready
if (currentQuestion < questions.length) {
displayCurrentQuestion();
} else {
displayScore();
// $(document).find(".nextButton").toggle();
// $(document).find(".playAgainButton").toggle();
// Change the text in the next button to ask if user wants to play again
$(document).find(".nextButton").text("Play Again?");
quizOver = true;
}
}
} else { // quiz is over and clicked the next button (which now displays 'Play Again?'
quizOver = false;
$(document).find(".nextButton").text("Next Question");
resetQuiz();
displayCurrentQuestion();
hideScore();
}
});
});
function resetQuiz() {
currentQuestion = 0;
correctAnswers = 0;
hideScore();
}
function displayScore() {
$(document).find(".quizContainer > .result").text("You scored: " + correctAnswers + " out of: " + questions.length);
$(document).find(".quizContainer > .result").show();
}
function hideScore() {
$(document).find(".result").hide();
}