写一个方法，求一个数组长度m,值是n

function demo(m,n){var arr=[];for (var i = 0; i < m; i++) {arr.push(n);}n=arr;return n;}console.log(demo(3,1));function demo(m,n){var ary=[];function aryPush(m,n){      if (ary.length==m) {      return ary;      }      ary.push(n);      return aryPush;      }return (aryPush(m,n));}console.log(demo(3,1))