how can I create an array with random numbers?

Question

enter image description herewhat I want is to create an array with random numbers so I can then add them to another array with a foreach

let jsonlength = this.accesoriosJson.length
let a = 0;
let randomNumber = new Array()
var myInterval = setInterval(function(){
  a++
  if (a > jsonlength) {
    clearInterval(myInterval);
  }else{
     randomNumber.push(Math.ceil(Math.random()*10))
  }
},100)

console.log(randomNumber) 

randomNumber.forEach(valor => {console.log(valor)})

I don't understand why the foreach doesn't work because console.log(randomNumber) works just fine

Why do you use a delay to push the nunbers? (where you wait 100 ms) — DownloadPizza
– DownloadPizza, Commented Aug 24, 2020 at 7:19

T.J. Crowder · Accepted Answer · 2020-08-24 07:18:57Z

4

When the forEach call happens, randomNumber doesn't have any entries in it, so forEach doesn't do anything. You're only adding entries later, when the setInterval callback runs. That happens long after (in computer terms) your forEach call.

answered Aug 24, 2020 at 7:18

T.J. Crowder

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Comments

Vivek Jain · Accepted Answer · 2020-08-24 07:24:50Z

1

I think for your purpose you should do something like this.

Call getRandomArray() after clearInterval(myInterval) to get RandomArray.

let jsonlength = 6;
let a = 0;
let randomNumber = new Array()
var myInterval = setInterval(function() {
  a++
  if (a > jsonlength) {
    clearInterval(myInterval);
    getRandomArray();
  } else {
    randomNumber.push(Math.ceil(Math.random() * 10))
  }
}, 0);

function getRandomArray() {
  console.log(randomNumber);

  randomNumber.forEach(valor => {
    console.log(valor)
  })
}

answered Aug 24, 2020 at 7:24

Vivek Jain

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