v1
3/29/2018 by klimcode 3/29/201800
Setup JavaScript
var i=0, x=500;
var arr = Array(x).fill().map((e,i)=>i);ready
for(var res=[x], i=1; i<x+1; i++) res.push[i];ready
arr.unshift(x);ready
arr = [x].concat(arr);ready
arr = [x, ...arr];var i=0, x=500;
var arr = Array(x).fill().map((e,i)=>i);for(var res=[x], i=1; i<x+1; i++) res.push[i];arr.unshift(x);arr = [x].concat(arr);arr = [x, ...arr];