如何从数组中返回随机值？

Question

我正在使用jQuery validate插件,并希望在成功时返回一个随机值.

现在我正在尝试使用:

     var success_message = new Array ();
     success_message[0] = "Good!";
     success_message[1] = "Ok!";
     success_message[2] = "Great!";
     success_message[3] = "Perfect!";
     success_message[4] = "Nice!";
     success_message[5] = "Awesome"; 
     var i = Math.floor(5*Math.random())

然后我需要输出我使用的值:

 $(document).ready(function(){
     var validator = $(".contactform").validate({
        success: function(label) {
           label.addClass("valid").text(success_message[i])
        }
     }); //end form validate code
 });

这会选择一个随机值,但对每个成功消息使用相同的值,而不是为每个字段选择不同的值.

Answer 1

您可以存储messages数组并计算要显示的消息,如下所示:

var messages = ["Good!", "Great!", "Awesome!", "Super!", "Nice!"];
function getMessage() {
   return messages[Math.floor(Math.random() * messages.length)];
}

给它这里一试,那么只需拨打getMessage你的.text()电话,就像这样:

label.addClass("valid").text(getMessage());

Answer 2

我们可以添加Method to Array.

Array.prototype.getRandomVal = function(){
    return this[Math.floor(Math.random()*this.length)];
};

messages.getRandomVal();

Answer 3

function sucess() {
 message = ["Good!","Awesome!","Super!","Nice!","Great!"];
 return message[Math.floor(Math.random() * message.length)];
}

 $(document).ready(function(){
     var validator = $(".contactform").validate({ ...
              success: function(label) {
    label.addClass("valid").text(success());
 }
      }); //end form validate code
         });