Loop through array object

Question

I am trying to loop through this array

var questions = [
    {
        ask: 'is Javascript the best language?',
        correct: 0,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },
    {
        ask: 'is Javascript the most popular language?',
        correct: 1,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },

]

and the point is I want to get every question with this loop and get these questions in console log

var currentQuestion = questions.length;

for( var i = 0; i < currentQuestion; i++){
   console.log(questions[i]);
}

but console.log says: Uncaught TypeError: Cannot read property 'length' of undefined

Can you create a small demo for this using jsfiddle or snippet here to show the issue happening. — palaѕн
– palaѕн, Commented May 2, 2020 at 15:09
I try to reproduce your solution and everything is good. Maybe you didn`t export questions? — Elena
– Elena, Commented May 3, 2020 at 7:05

Ansh · Accepted Answer · 2020-05-02 15:15:44Z

1

It looks like the variable questions is not included in the same file.

answered May 2, 2020 at 15:15

Ansh

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Comments

anees · Accepted Answer · 2020-05-02 15:10:55Z

more information at https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects about the js objects.

var questions = [
    {
        ask: 'is Javascript the best language?',
        correct: 0,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },
    {
        ask: 'is Javascript the most popular language?',
        correct: 1,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },

];

var currentQuestion = questions.length;

for( var i = 0; i < currentQuestion; i++){
   console.log(questions[i].ask);
}

// es6 way 

questions.map(q => {
   // console.log(q.ask); // will get all the questions
})

Aks Jacoves · Accepted Answer · 2020-05-02 15:13:01Z

0

Use for of.. :

var questions = [
    {
        ask: 'is Javascript the best language?',
        correct: 0,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },
    {
        ask: 'is Javascript the most popular language?',
        correct: 1,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },

]

for(let values of questions){
  console.log(values);
 }

answered May 2, 2020 at 15:13

Aks Jacoves

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