有意思的程序员租房电话

用JS实现的
var arr = [1,4,5,6,7,8];
var index = [0,2,0,4,3,4,5,2,3,0,1];
var a = “”
for (var i = 0; i < index.length; i++) {
console.log(i)
var b = index[i]
a += arr[b];
}
console.log(a)