Javascript 如何从数组中返回随机值？
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How can I return a random value from an array?
提问by Brooke.
I'm using the jQuery validate plugin, and would like to return a random value on success.
我正在使用 jQuery 验证插件，并希望在成功时返回一个随机值。
Right now I'm trying to use:
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())
Then where I need to output the value I use:
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
});
This selects a random value but uses the same value for each success message instead of selecting a different one for each field.
这将选择一个随机值，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。
回答by Nick Craver
You can store the messagesarray and calculate the message to show as you go, like this:
您可以存储messages数组并计算要随时显示的消息，如下所示：
var messages = ["Good!", "Great!", "Awesome!", "Super!", "Nice!"];
function getMessage() {
return messages[Math.floor(Math.random() * messages.length)];
}
Give it a try here, then just call getMessagein your .text()call, like this:
在这里试一试，然后只需拨打getMessage您的.text()电话，如下所示：
label.addClass("valid").text(getMessage());
回答by Rakesh Kumar
We can add Method to Array.
我们可以将方法添加到数组。
Array.prototype.getRandomVal = function(){
return this[Math.floor(Math.random()*this.length)];
};
messages.getRandomVal();
回答by Mike Sherov
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
});
