如何在javascript中修改数组并提取随机值

Question

I want to build a simple quiz app for geography class, my logic is this: store the question into an array and pull a random question from an array, when the user clicks on the answer a function fires up and compare the answer, after answer exclude question from the array and pull another random question so far I've managed to pull random question, give an answer, compare answer, and remove the question from the array and pull another random question but when function fires up the answer is compared with the first random question

here is y code so far:

    let judet = judete[Math.floor(Math.random() * judete.length)];

    console.log("start> "+judet);

    function checkAnswer(val){

        console.log("ras= "+val)


        if(val==judet){
            console.log("corect");


            let valueToRemove = val;
            let filteredItems = judete.filter(item => item !== valueToRemove);
            let judet = judete[Math.floor(Math.random() * judete.length)];

            console.log("inrebare= "+judet);

        }else{
            console.log("gresit");

            let valueToRemove = val;
            let filteredItems = judete.filter(item => item !== valueToRemove);
            let judet = judete[Math.floor(Math.random() * judete.length)];

            console.log("inrebare= "+judet);

        }


    }

Answer 1

As @Dave said in the comments, you can shuffle the array and then pop.

 var arr = [1, 2, 3, 4, 5]; for (var i = 0; i < 5; i++) { shuffle(arr); console.log(arr.pop()); } function shuffle(array) { for (let i = array.length - 1; i > 0; i--) { let j = Math.floor(Math.random() * (i + 1)); [array[i], array[j]] = [array[j], array[i]]; } }

 Keep re-running me to see the result.

Answer 2

@Saud you pointed me into the right direction, here is how i have done it:

let judete = ["ar","ab","ag","tm","bh"];

    shuffle(judete);


    function shuffle(array) {
    for (let i = array.length - 1; i > 0; i--) {
        let j = Math.floor(Math.random() * (i + 1));
        [array[i], array[j]] = [array[j], array[i]];
     }
    }
        let judet = judete.pop();


    console.log("start> "+judet);  

    function checkAnswer(val){

        console.log("ras= "+val);


        if(val==judet){
            console.log("corect");

            shuffle(judete); 
            judet = judete.pop();

            console.log("inrebare= "+judet);

        }else{
            console.log("gresit");

            shuffle(judete); 
            judet = judete.pop();

            console.log("inrebare= "+judet);

        }


    }

Answer 3

Why not use randojs.com ?

var arr = randoSequence(["question 1", "question 2", "question 3"]);
for(var i = arr.length - 1; i >= 0; i--){
  console.log(arr.pop().value);
}

Just include this in your head tag if you wanna use my answer:

<script src="https://randojs.com/1.0.0.js"></script>