课堂练习---数组--反转数组

var arr1:Arry = new Array("上","下","左","右");

 var arr2:Array = new Array();

/*arr2[0] = "上";

arr2[1] = "下";

arr2[2] = "左";

arr2[3] = "右";

arr2[0] = arr1[3];

arr2[1] = arr1[2];

arr2[2] = arr1[1];

arr2[3] = arr1[0];

arr2[0] = arr1[arr1.length-1-0];

arr2[1] = arr1[arr1.length-0-1];

arr2[2] = arr1[arr1.length-1-2];

arr2[3] = arr1[arr1.length-1-3];*/

for (var i:int = 0; i<=arr1;i++)

{

 　　arr2[i] = arr1[arr1.length-1-i];

}

trace (arr2);/*trace的结果是:右,左,下,上,