i am learning on how to parse json using jquery
PHP
foreach($cars as $car)
{
$output['carID'][] = $car->carID;
$output['carName'][] = $car->carName;
}
echo jsonEncode($output);
JSON
{"carID":["1","2"],"carName":["BMW","Mercedez Benz"]}
My javascript
$.getJSON('/cars.php', { carID: carID }, function(data) {
$.each(data, function(i,item) {
for(j=0; j < item[item.carName]; j++) {
console.log(item[item.carName][j]);
}
});
});
I think my code is entirely wrong because its not working.
how can i get the value inside of ["1","2"] ?
Thanks for the help.
It's not the "value of 1" that you're looking for. It's the value at index 0, which happens to be "1".
["1","2"] is the value of carID, and it is an array.
Try accessing it this way:
alert(item.carID[0]); // will alert "1"
alert(item.carID[1]); // will alert "2"
As I know, array indexes start from "0" in many languages, so you need something like this to get array values in your code;
var data = {"carID":["1","2"],"carName":["BMW","Mercedez Benz"]};
$.each(data.carID, function(key, val){
var i = 0, id;
while(id = val[i++]) console.log(id);
});
// or just simply use
console.log(data.carID[0]);
Related
I am getting data in a php file from db as
while ($row=mysqli_fetch_row($result))
{
printf ("beacon id : %s \n",$row[2]);
printf ("beacon uuid :(%s)\n",$row[3]);
}
now i want to append that data in table and show in JQueryUI Dialog box like this
In ajax success form i tried to create hardcore table and get data
success: function(response){
for (var i = 0; i < 3; i++) {
var row = $('<tr></tr>').appendTo(mytable);
for (var j = 0; j < 3; j++) {
$('<td></td>').text("text1").appendTo(row);
}
}
$('<table></table>').appendTo("#dialog");
$("#dialog").dialog("open");
}
it is working fine
///////////////
when I tried to get to get my data in table its not working
I tried
success: function(response){
var table = $("#table tbody");
$.each(response, function(idx, elem){
table.append("<tr><td>"+elem.id+"</td></tr>");
});
$('<table></table>').appendTo("#dialog");
$("#dialog").dialog("open");
}
but it is not working ,
console.log is coming like
what can i modify to display data ?
You're not appending the table with data, instead you're creating a new empty table element and appending it.
Edit:
You also can't loop over a string (which is the ajax response). If you output the html in php things will be simpler. This is also untested but hopefully you get the idea.
php:
while ($row = mysqli_fetch_row($result)) {
printf("<tr><th>beacon id :<th> <td>%s</td><tr>", $row[2]);
printf("<tr><th>beacon uuid :<th> <td>(%s)</td><tr>", $row[3]);
};
js:
success: function (response) {
if (response) {
var table = $("#table tbody");
table.append(response);
table.appendTo("#dialog");
$("#dialog").dialog("open");
}
}
First, I would adjust your PHP so that it is sending back JSON data. The data you are sending back now is just text. It will not be read as an Object by JS.
PHP
$beacon = array();
while ($row=mysqli_fetch_row($result)){
$beacon[] = array("id" => $row[2], "uuid" => $row[3]);
}
header('Content-type:application/json;charset=utf-8');
echo json_encode($beacon);
See: Returning JSON from a PHP Script
This creates an array of arrays. The resulting page should be something like:
[
{
"id": "Beacon00UUID::fda50693-a4e2-4fb1-afcf-c6eb07647825",
"uuid": "(Beacon00RSSI::-69)"
},
{
"id": "Beacon01UUID::2f234454-f491-1ba9-ffaf-000000000001",
"uuid": "(Beacon01RSSI::-53)"
},
{
"id": "Beacon02UUID::b9407f30-f5f8-466e-aff9-25556b57fe6d",
"uuid": "(Beacon02RSSI::-75)"
},
{
"id": "Beacon04UUID::00000000-0000-0000-0000-000000000000",
"uuid": "(Beacon04RSSI::-88)"
},
]
This will allow your jQuery to collect the content as JSON. In your success callback, you can handle this better. this is also assuming you have dataType: "json" elsewhere in your AJAX call.
jQuery
success: function(response){
var $tbl = $("<table>");
$.each(response, function(key, val){
var $row = $("<tr>").appendTo($tbl);
if(key % 2 == 0){
$row.addClass("even");
} else {
$row.addClass("odd");
}
var $cell = $("<td>").html(val.id).appendTo($row);
});
$("#dialog").html($tbl.prop("outerHTML")).dialog("open");
}
Now, if your data was coming back with a key of beacon id, you would need to call this exactly. For example, it would not be elem.id, it would have to be elem['beacon id'] to call the right index in the object. You can't use the dot notation that includes a space in the index name. Bare that in mind when naming your indexes.
There is a subtle difference with $.each() and .each(), the former is designed for arrays and objects, with a key and value pair and the latter designed for jQuery objects, with an index and element pair. nothing wrong with what you did, just explaining why you might use one over the other.
Hope this helps. Let me know if something is not clear.
I have a json response from php to ajax. The thing is depending on the value entered in a text box the number of json arrays vary. Example: sometimes it may return {"count1":10, "ccc1":30} and sometimes like this {"count1":10, "ccc1":32, "count2":40, "ccc2":123,"count3":32,"ccc3":21}. I extract the value in jquery this way:
success: function(response){
var count = response.count1;
//do something
}
But now since the number of counts are different I used a loop. Question is I can figure out how many of them I am receiving but how can I process them? The var count = response.count needs to be specific right? I cannot just concate any strings like this:
var count = 0;
while(something){
count = count + 1;
var str = "count"+count;
var whatever = response.str;
}
So, can someone please help me with a suitable solution in this case?
You are on the right track there. Something like this should work for you.
var i = 1;
while(response['count' + i]) {
var count = response['count' + i++];
}
You can access the properties as if they were array indices. so response['count'+i] works.
Loop through all properties and add them in a variable like following.
var response = { "count1": 10, "ccc1": 32, "count2": 40, "ccc2": 123, "count3": 32, "ccc3": 21 };
var count = 0;
for (var prop in response) {
if (prop.startsWith('count'))
count += response[prop];
}
console.log(count);
To retrieve all values use jQuery $.each function.
var data_tmp = '{"count1":10, "ccc1":32, "count2":40, "ccc2":123,"count3":32,"ccc3":21}';
var data = $.parseJSON(data_tmp);
$.each(data, function(k,val){
if(k.toLowerCase().indexOf("count") >= 0){
$('.wr').append('<div>' + val + '</div>')
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<div class="wr"></div>
success: function(response){
var count = response.count1;
var object = JSON.parse(response);
alert(object.length);
for (i = 0; i < object.length; i++) {
console.log(object[i]);
}
}
I have a jquery function that calls a controller which in turn calls a function that I extracted the data from the users table. I return an array cin all the data in the table. ID, username etc etc.. So mold date in jQuery and indeed the array is full. Ex. [{"Id_user": "21", "username": "cassy1994"}].
From this array I have to extract only the username. How can I do?
This is the Ajax function:
$(".apprezzamenti").click(function()
{
var id = $(this).attr('id');
var txt = "";
$.get("http://localhost/laravel/public/index.php/apprezzamenti/"+id,
function(data)
{
$(".modal-body-apprezzamenti>p").html(data);
});
});
If the json is parsed, your object is stored in an array, so:
data[0].username
If not (if it is a string), you need to parse it first:
data_parsed = JSON.parse(data);
// data_parsed[0].username
assuming data is where your response is stored, data[0].username should work. Example:
$(".modal-body-apprezzamenti>p").html(data[0].username);
To print all usernames:
var count = 0;
$.each($(".modal-body-apprezzamenti>p"), function() {
this.html(data[count].username);
count++;
]);
Hope this helps!
So, this is the problem. It's okay though, I realized that with this code I'm using can not seem to generate as many sections as there are users want to print and it shows me only the last username because it can generate only a paragraph in html. A possible solution which would it be?
This is the code:
$(".apprezzamenti").click(function()
{
var id = $(this).attr('id');
var txt = "";
$.get("http://localhost/laravel/public/index.php/apprezzamenti/"+id,
function(data)
{
data_parsed = JSON.parse(data);
for(var i=0; i<data_parsed.length; i++)
{
$(".modal-body-apprezzamenti>p").html((data_parsed[i].username));
}
});
});
I have a PHP file which only return an array with the drivers and a url:
{"drivers":[{"marco":[0],"luigi":[123],"Joan":[2444],"George":[25]}, {"marco":[23],"luigi":[3],"Joan":[244],"George":[234]}],"url":"google.es"}
Is the json correctly structured?
And I'm trying to get the result using jQuery and AJAX by this way:
$.getJSON('calculate.php&someparams=123', function(data) {
alert("url - " + data.url);
var arr = data.drivers;
for (var i = 0; i < arr.length; i++) {
alert(arr[i] + " - " + arr[i][0]);
}
});
I see the first alert() with the url, but the second one does not works...
What am I doing wrong?
If you need more info let me know and I'll edit the post.
The drivers is not an array, it is an object, you use $.each to iterate through the object elements.
$.getJSON('calculate.php&someparams=123', function(data) {
$.each(data.drivers, function(key, value){
$.each(value, function(key, value){
console.log(key, value);
});
})
});
That's an object, not an array. It has named properties, not numerical indexes.
You need a for in loop to loop over the properties.
drivers is an object. Not an array.
How about this?
var json_string = '{"drivers":{"marco":[0],"luigi":[123],"Joan":[2444],"George":[25]},"url":"google.es"}';
var obj = jQuery.parseJSON(json_string);
alert(obj.url);
I have created APIs to retrieve data from my server and then I get the data with json format like this :
{
"items": [
{
"2013-03-28": 1771,
"2013-03-29": 1585,
"2013-03-30": 1582,
"2013-03-31": 1476,
"2013-04-01": 2070,
"2013-04-02": 2058,
"2013-04-03": 1981,
"2013-04-04": 1857,
"2013-04-05": 1806,
"2013-04-06": 1677,
"2013-04-07": 1654,
"2013-04-08": 2192,
"2013-04-09": 2028,
"2013-04-10": 1974,
"2013-04-11": 1954,
"2013-04-12": 1813,
"2013-04-13": 1503,
"2013-04-14": 1454,
"2013-04-15": 1957,
"2013-04-16": 1395
}
]
}
How do I looping with my json data dynamically using jQuery?
My code :
<html>
<head></head>
<body>
<script src="jquery-1.9.1.js"></script>
<script>
$(document).ready(function() {
$.ajax({
type : "GET",
url: "myurl.php",
cache: false,
dataType: "jsonp",
success:function(data){
if(data==''){
alert('Fail');
}else{
alert('Success');
}
}
})
});
</script>
</body>
</html>
How do I modify my jQuery to get data dynamically following the date that the data will change every day as in the example I wrote above data??
Thanks before...
There are a few things to consider with your example data, but in your case, the following will do the trick:
var importantObject = data.items[0];
for(var item in importantObject ){
var theDate = item;//the KEY
var theNumber = importantObject[item];//the VALUE
}
Here is a working example
But what does all this mean?...
First of all, we need to get the object that we want to work with, this is the list of dates/numbers found between a { } (which means an object) - an array is defined as [ ]. With the example given, this is achieved like so:
var importantObject = data.items[0];
because items is an array, and the object we want is the first item in that array.
Then we can use the foreach technique, which effectively iterates all properties of an object. In this example, the properties are the date values:
for(var item in importantObject ){ ... }
Because we are iterating the properties, item will be the property value (i.e. the date bit), so item is the date value:
var theDate = item;//the KEY
Finally we get the number part. We can access the value of any given object property by using the string value of the property index (relative to the object), like so:
var theNumber = importantObject[item];//the VALUE
If you already know which date you want the value for, then you can access it directly like so:
var myValue = data.items[0]["2013-04-16"];//myValue will be 1395 in this example
Using jQuery.each() loop through the items
$.each(data.items[0], function (key, value) {
console.log(key + ": " + value);
var date = key;
var number = value;
});
DEMO HERE
You can use the jQuery each function to do this. For example like this:
$.each(data, function(k, v) {
// Access items here
});
Where k is the key and v is the value of the item currently processed.
//get your detail info.
var detail = data.items[0];
$.each(detail, function(key, val) {
console.log(key + ": " + val);
}