JSFiddle - React, Tailwind, and code Playground

by holden321

JavaScript

var a=[];
for(var i=0;i<20;i++) a[i]=0;
var total=8;
while(total) {
    var index=Math.floor(Math.random()*20);
    if(a[index]!=1) {
        --total;
        a[index]=1;
    }
}
alert(a);