一个JS数组遍历循环的问题
var arr1 = [1,1,1,2,2,3,3];
var arr2 = [[],[],[]];
for (x in arr1){
var i = arr1[x]-1;

arr2[i].push(arr1[x]); }

这段JS代码不正确在哪里?怎么修正呢? JS?ARRAY?FOR?IN JS ARRAY FOR IN
[解决办法]
没有问题

var  arr1 = [1,1,1,2,2,3,3];
var arr2 = [[],[],[]];
for (x in arr1){
  var i = arr1[x]-1;
  arr2[i].push(arr1[x]);
}

document.write(arr2);