Iterating thru an array using javascript for [duplicate]

Question

How do I iterate thru an array like this using 'for' in jquery. This one has me totally lost. I cant figure how to get those values out from an array like this and I cant change the way the array is done.

//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

since your passing data as parameter, you can access the data

try something like this :

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

May be you need this:

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
}  

Answer 4

If your PHP code is like this:

// Use $errors = array(...) if your PHP version is < 5.4
$errors = [
    'success' => false, // Why is 'success' part of the $errors array?
    'error_1' => 'Enter a valid username.',
    'error_2' => 'Enter a valid email.',
    'error_3' => 'Enter a valid password.'
];

print json_encode($errors);

, then in your JavaScript, you can do the following:

$.ajax({
    'url': 'your.url.com/data.json',
    'dataType': 'json',
    'cache': false, // Why are you doing this?
    'success': function (json_data) {
        var i = json_data.length;
        while (i--) {
            alert(json_data[i]); // Or whatever you want to do with the data.
        }
    }
});

I'm pretty sure this is one of the best ways to do this. Someone please correct me if I'm wrong.