使用javascript遍历数组

Question

如何在jquery中使用'for‘遍历这样的数组？这让我完全迷失了方向。我不知道如何从这样的数组中取出这些值，也不能改变数组的执行方式。

//Php
$errors['success']   = false;
$errors['#errOne']   = "Enter a valid username";
$errors['#errTwo']   = "Enter a valid email";
$errors['#errThree'] = "Enter a valid password";
echo json_encode($errors);//

dataType:"json",
cache:false,
success: function(data){
for (i=1; i<?; i++){//Start at 1
//I'm totally lost here.
//Output: "#errOne" "Enter a valid username" ->Loop thru remaining messages
}   
},

Answer 1

由于您将数据作为参数传递，因此您可以访问数据

尝试如下所示：

var $errors = {};
$errors['success']   = false;
$errors['#errOne']   = "Enter a valid username";
$errors['#errTwo']   = "Enter a valid email";
$errors['#errThree'] = "Enter a valid password";
    data : $errors;
    success: function(data){
    for (var i in data ){
       console.log(i + ':' + data[i]);
    }

Answer 2

你可能需要这样做：

success: function(data){
    $.each(data, function(key, value) { 
        alert(key + ': ' + value); 
    });
}

Answer 3

for (var key in data){
   alert(key); // gives keys  success, #errOne, #errTwo, #errThree
   alert(data[key]); // gives values  false, Enter a valid username, Enter a valid email, Enter a valid password
}