如何创建一个带有随机数的数组？

Question

enter image description here what 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

Answer 1

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.

Answer 2

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) }) }