山本

摘要： function myjoin(arr) { if (arr.length <= 0) { return ""; } var s = arr[0]; for (var i = 1; i < arr.length; i++) { s = s + "|" + arr[i]; } return s; } var arr = new Array(); arr[0] = "tom"; arr[1] = "jerry"; arr[2] = "lily"; alert(myjoin(arr)); 阅读全文

摘要： function myreverse(arr) { for (var i = 0; i < arr.length / 2; i++) { var temp = arr[i]; //交换变量 arr[i] = arr[arr.length - i - 1]; arr[arr.length-i-1]=temp; } } var arr = new Array(); arr[0] = "tom"; arr[1] = "jerry"; arr[2] = "lily"; alert(arr); myreverse(arr); alert( 阅读全文