Permitting various valid responses for questions in a multiple-choice test | Utilizing Angular.js and JSON

Question

Permitting various valid responses for questions in a multiple-choice test | Utilizing Angular.js and JSON

As a beginner in this realm, I must apologize if my query seems naive.

I recently crafted a multiple-choice quiz using HTML, CSS, JavaScript (angular.js), and a JSON data file following a tutorial I stumbled upon. The outcome pleased me, but now I am faced with the task of enabling users to select more than one correct answer for each question. How can I achieve this functionality? Do I simply need to designate multiple correct answers in the JSON file?

Your guidance is greatly appreciated!

Below is a snippet of my code:

HTML:

<!DOCTYPE HTML>

<html ng-app="myQuiz">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Test Your Knowledge: Saturn</title>
        <link rel="stylesheet" type="text/css" href="css/quiz.css">
    </head>
    <body>

    ...

JSON (multiple questions included - formatted as shown:

[{
    "question" : "What is the name of Saturn's largest moon?",
    "answers"  : [
        {"id"  : 0, "text" : "Hercules"},
        {"id"  : 1, "text" : "Europa"},
        {"id"  : 2, "text" : "Goliath"},
        {"id"  : 3, "text" : "Zeus"},
        {"id"  : 4, "text" : "Titan"},
        {"id"  : 5, "text" : "Triton"}
    ],
    "correct"  : 4,
    "feedback" : "Though the names seem similar, Triton orbits the planet Neptune."
}]

JavaScript

(function(){
var app = angular.module('myQuiz',[]);
app.controller('QuizController'['$scope','$http','$sce',function($scope,$http,$sce){
...

javascript html css angularjs json

Answer 1

Answer №1

There are various methods you can employ to solve this problem.

While I could simply provide the solution, I believe there is value in trying to figure it out yourself with some guidance, especially since you mentioned that you are new to this. :)

Here is a suggested approach:

Start by creating a memory store of answers to compare against

When a checkbox is selected, compare the question and answer to those stored
If the stored question includes the selected answer, you have a match. Otherwise, it's a miss.

For instance:

var questions = {
    "question1": ["answer1", "answer2"],
    "question2": ["answer1", "answer3", "answer3"]
};

function checkAnswer(question, selectedAnswer) {
    if (questions[question]) {
        var found = false;

        questions[question].forEach(function (answer) {
            if (answer === selectedAnswer) {
                found = true;
            }
        });

        if (found) {
            // Perform specific action
        }

        return found;
    }
}

console.log(checkAnswer("question1", "answer1")) // true
console.log(checkAnswer("question1", "answer4")) // false

You can enhance this function further by allowing it to accept multiple answers as input instead of just one, or evaluate all answers for a single question against the stored data. Alternatively, you can apply the same function to each selected answer for a given question. Both approaches are effective.

This should accomplish your objective! :)

If you encounter any difficulties and require assistance, feel free to leave a comment detailing your specific situation (e.g., Angular), and I'll devise a solution tailored to your needs.

Answer 2

There are various methods you can employ to solve this problem.

While I could simply provide the solution, I believe there is value in trying to figure it out yourself with some guidance, especially since you mentioned that you are new to this. :)

Here is a suggested approach:

Start by creating a memory store of answers to compare against

When a checkbox is selected, compare the question and answer to those stored
If the stored question includes the selected answer, you have a match. Otherwise, it's a miss.

For instance:

var questions = {
    "question1": ["answer1", "answer2"],
    "question2": ["answer1", "answer3", "answer3"]
};

function checkAnswer(question, selectedAnswer) {
    if (questions[question]) {
        var found = false;

        questions[question].forEach(function (answer) {
            if (answer === selectedAnswer) {
                found = true;
            }
        });

        if (found) {
            // Perform specific action
        }

        return found;
    }
}

console.log(checkAnswer("question1", "answer1")) // true
console.log(checkAnswer("question1", "answer4")) // false

You can enhance this function further by allowing it to accept multiple answers as input instead of just one, or evaluate all answers for a single question against the stored data. Alternatively, you can apply the same function to each selected answer for a given question. Both approaches are effective.

This should accomplish your objective! :)

If you encounter any difficulties and require assistance, feel free to leave a comment detailing your specific situation (e.g., Angular), and I'll devise a solution tailored to your needs.

Answer 3

Answer №2

Consider updating the "correct" field in your json to an array of ids.

If you have a question with only one answer, the array will contain just one element.

If you have a question with multiple answers, adjust your javascript function selectAnswer() to handle an array instead of a single value.

Quick tip: consider using boolean values for your "correctness" and "answered" fields instead of strings.

Answer 4

Consider updating the "correct" field in your json to an array of ids.

If you have a question with only one answer, the array will contain just one element.

If you have a question with multiple answers, adjust your javascript function selectAnswer() to handle an array instead of a single value.

Quick tip: consider using boolean values for your "correctness" and "answered" fields instead of strings.

Answer 5

Answer №3

Resolved using the code snippet below:

var superbag = function(sup, sub) {
    sup.sort();
    sub.sort();
    var i, j;
    for (i=0,j=0; i<sup.length && j<sub.length;) {
        if (sup[i] < sub[j]) {
            ++i;
        } else if (sup[i] == sub[j]) {
            ++i; ++j;
        } else {
            // sub[j] not in sup, so sub not subbag
            return false;
        }
    }
    // make sure there are no elements left in sub
    return j == sub.length;
}
var contains = function(needle) {
    // Per spec, the way to identify NaN is that it is not equal to itself
    var findNaN = needle !== needle;
    var indexOf;

    if(!findNaN && typeof Array.prototype.indexOf === 'function') {
        indexOf = Array.prototype.indexOf;
    } else {
        indexOf = function(needle) {
            var i = -1, index = -1;

            for(i = 0; i < this.length; i++) {
                var item = this[i];

                if((findNaN && item !== item) || item === needle) {
                    index = i;
                    break;
                }
            }

            return index;
        };
    }

    return indexOf.call(this, needle) > -1;
};

Answer 6

Resolved using the code snippet below:

var superbag = function(sup, sub) {
    sup.sort();
    sub.sort();
    var i, j;
    for (i=0,j=0; i<sup.length && j<sub.length;) {
        if (sup[i] < sub[j]) {
            ++i;
        } else if (sup[i] == sub[j]) {
            ++i; ++j;
        } else {
            // sub[j] not in sup, so sub not subbag
            return false;
        }
    }
    // make sure there are no elements left in sub
    return j == sub.length;
}
var contains = function(needle) {
    // Per spec, the way to identify NaN is that it is not equal to itself
    var findNaN = needle !== needle;
    var indexOf;

    if(!findNaN && typeof Array.prototype.indexOf === 'function') {
        indexOf = Array.prototype.indexOf;
    } else {
        indexOf = function(needle) {
            var i = -1, index = -1;

            for(i = 0; i < this.length; i++) {
                var item = this[i];

                if((findNaN && item !== item) || item === needle) {
                    index = i;
                    break;
                }
            }

            return index;
        };
    }

    return indexOf.call(this, needle) > -1;
};

Permitting various valid responses for questions in a multiple-choice test | Utilizing Angular.js and JSON

Answer №1

Answer №2

Answer №3

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