Using a constructor function to push objects onto an array?

Question

I know I'm way off, but I can't find any reading that's helped me solve this. I'm trying to use a constructor function to create an array filled with Questions, Choices, and Answers for a quiz. I'm not sure of the syntax to push my object onto the array.

My constructor function is as follows:

// Create array to traverse(using jQuery) so that on clicking submit, the current question
//is deleted, and the next question in the array is loaded.
var questionsArray = [];

//Contructor Function to create questions and push them to the array
function Question (question, choices, answer){
    this.question = question;
    this.choices = choices;
    this.answer = answer;
    return questionsArray.push();  //This is way off I know, but I'm lost...
}

push(…) takes an argument. What do you want to push, the new Question instance? You'd need to pass this, but actually it would be better to call questionsArray.push(new Question(…)) from outside the constructor. Btw, you should not return anything from a constructor function. — Bergi
– Bergi, Commented Dec 12, 2015 at 19:43

Kondziutek · Accepted Answer · 2015-12-12 19:38:53Z

2

questionsArray.push(new Question('how?',['a','b','c'],'a'));

and in your Question the push seems to be unnecessary

function Question (question, choices, answer){
    this.question = question;
    this.choices = choices;
    this.answer = answer;
}

On creating the next form use var current_question = questionsArray.shift();, which takes first element off the array and shifts the rest. Alternatively, use questionsArray.pop() to get the last ones from the queue.

For incrementing the array itself, you could do it in the constructor - you could end Question function with questionsArray.push(this); but I'd rather use an external function to create questions and insert them into this array.

edited Dec 12, 2015 at 19:38

answered Dec 12, 2015 at 19:28

Kondziutek

1441 silver badge6 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Bergi Over a year ago

This. I couldn't have said it better.

Collectives™ on Stack Overflow

Using a constructor function to push objects onto an array?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related