I have to create cart system in my mobile application, i want to store the id and the quantity of products, the id should be the key of my array (for modifying product quantity) , tried to use object instead of array but i get error: undefined is not a function when i try to read my json variable
by JSON.stringify(cart)
My cart code is like this
var cart = [];
var produit = {};
produit['qte'] = $('.'+id_prd).text();
produit['id_produit'] = id_prd;
cart[id_prd] = produit;
window.sessionStorage["cart1"]= JSON.stringify(cart);
return me
{"7":{"qte":"1","id_produit":7},"8":{"qte":"1","id_produit":8}}
when I tried to parse the json string with
var parsed = $.parseJSON(window.sessionStorage["cart1"]);
i get the error 'undefined is not a function'
when triying to read the json with
var i=0;
for (k in parsed) {
var k_data = parsed[k];
k_data.forEach(function(entry) {
alert(entry);
ch+=entry.id_produit;
if(i<parsed.length-1)
ch+= ',';
if(i==parsed.length-1)
ch+=')';
i++;
});
}
Can you clarify me the error cause, and if there's a solution to better read the json
The problem is that you are using k_data.forEach(function(entry) but forEach is for Arrays, and k_data is just a simple javascript object.
Try changing:
k_data.forEach(function(entry){
to this:
$(k_data).each(function(entry){
Even more, if the JSON is always in the same structure you posted, I think the each function is not necessary, maybe this is the way you are looking for:
var i=0;
var ch = "(";
for (k in parsed) {
var k_data = parsed[k];
alert(k_data);
ch+=k_data.id_produit;
ch+= ',';
i++;
}
ch = ch.substring(0, ch.length - 1) + ")";
You shouldn't need jQuery for this. The same JSON object you used to stringify has a parse function:
var parsed = JSON.parse(window.sessionStorage["cart1"]);
If that still breaks, there's probably something wrong with another undefined object.
You can try something like this:
<script type="text/javascript">
var finalArr = new Array();
var dataArr = new Array();
dataArr = window.sessionStorage["cart1"];
if (JSON.parse(dataArr).length > 0) {
for (var i = 0; i < JSON.parse(dataArr).length; i++) {
finalArr.push((JSON.parse(dataArr))[i]);
}
}
</script>
Related
I used the Gson library to create a json from java and it returns me something like that:
[{"title":"title1","author":"author1"},{"title":"title2","author":"author2"}]
How can I parse and access to the values in my js file?
i use a lot w3schools site here
var text = '{"name":"John Johnson","street":"Oslo West 16","phone":"555 1234567"}';
var obj = JSON.parse(text);
document.getElementById("demo").innerHTML =
obj.name + "<br>" +
obj.street + "<br>" +
obj.phone;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h2>JSON Object Creation in JavaScript</h2>
<p id="demo"></p>
Getting these is actually pretty easy in JS because JSON Objects are just considered Objects by js.
You can do this like so:
for (let i = 0; i < myArray.length; i++) {
let currObj = myArray[i];
let keys = Object.keys(currObj);
for (let j = 0; j < keys.length; j++) {
let myValue = keys[j];
doSomethingWithMyValue(myValue);
}
}
That will get every value for every key in every object in your array. This should give you a pretty good baseline for how these objects work.
Edit: Worth noting, there is also a Object.values(obj), method, which will return a list of all the values in your object in order, but it currently has very poor browser support, so you are much safer using Object.keys and then iterating over the keys like I showed above.
It's hard to say what you want to do with the data, and whether or not there are duplicate titles, as in your example. However...
var a = [{"title":"title1","author":"author1"},{"title":"title2","author":"author2"}];
a.forEach(function(v) {
doSomething(v.title, v.author);
});
should work
With a for loop
If you get the JSON as an array
var json = [{"title":"title1","author":"author1"},{"title":"title2","author":"author2"}];
for (var i = 0; i < json.length; i++) {
console.log(json[i].title, json[i].author);
}
If you get the JSON as a string
var string = '[{"title":"title1","author":"author1"},{"title":"title2","author":"author2"}]';
var json = JSON.parse(string);
for (var i = 0; i < json.length; i++) {
console.log(json[i].title, json[i].author);
}
//Here an example ---
var elements=[{id:123, name:'lorem'},{id:456, name:'ipsum'},{id:998, name:'verrugas'}];
for (item in elements){
console.log(elements[item].name);
}
Ok, that was a very noob question.
Firstly, to access to the values I have to do something like
data.title
In my case I had an array so I had to use something like
var j = JSON.parse(data);
for (var i = 0; i < j.length ; i++) {
console.log(j[i].title);
}
When I run for the first time this function it said "JSon unexpected identifier Object, that because Gson was returning already a json and javascript was trying to create a json of a json, so I removed the JSON.parse(data) and now it works!
Thanks u all
what is the best way to convert this array in to json in angular js:
here i need to convert this data into json
0:"1800-300-1947"
1:"112"
2:"8529631485"
3:"7299490148"
i have tried var myJsonString =JSON.stringify(data);
but its not working it shows like '[]' in the log
In this code i am getting the value from array and pushed into the another array called data. if i log the data i got the above result. how to convert that into json
here i have added my code for your reference
var data = Array();
for (var i = 0; i < contacts.length; i++) {
var contact = contacts[i].phoneNumbers[j].value;
console.log(contact);
data.push(contact);
}
var myJsonString =JSON.stringify(data);
console.log(myJsonString);
Please refer below code for reference its working.
var contacts = [];
contacts[0] = {"phoneNumbers": ["1800-300-1947"]};
contacts[1] = {"phoneNumbers": ["112"]};
contacts[2] = {"phoneNumbers": ["8529631485"]};
contacts[3] = {"phoneNumbers": ["7299490148"]};
var myJsonString = JSON.stringify(contacts);
console.log(myJsonString);
I have a job to refractor strings to start using json so they can just pass json objects. So I have made array of names and then I'm trying to go through and make key and values but I'm getting an error in the console that it cant find x of no value. Can someone point me in the right direction?
var newName = ['ManagingOrg', 'ActiveOrg', 'Severity', 'SeverityClassification', 'WorkQueue', 'TicketState',................ to long to post];
$().each(newName, function (key, value) {
key = newName[this];
value = newValues[this] = $('#' + key).val();
newArray = [key][value];
newArray = JSON.stringify(newArray);
alert(newArray);
$('.results').html(origArray[TicketNumber]);
});
I'm assuming you have "newValues" and "origArray" defined elsewhere?
In any case you'll need to at least adjust the following:
"$().each" should be $.each
"newArray" should be defined outside and you should use newArray[key] = value
you don't have a variable "TicketNumber" defined and so you should wrap "TicketNumber" in quotes
this is a reserved word so you shouldn't use it in "newName[this]" or "newValues[this]"
I suggest using a for loop instead of $.each() based on what you're trying to do inside.
https://msdn.microsoft.com/en-us/library/bb299886.aspx
var origArray = [];
var newName = ['ManagingOrg', 'ActiveOrg', 'Severity', 'SeverityClassification'
];
for (var i = 0; i < newName.length - 1; i++) {
var object = {};
object[newName[i]] = newName[i];
object = JSON.stringify(object);
origArray.push(object);
}
I using JavaScript JSON library to parse JSON encoded array, received via POST.
Here is my code:
var itemsRequest = '[{"id":"142"},{"id":"152"}]';
var items = JSON.parse(itemsRequest);
for(var i = 0; i<items.count(); i++)
{
var item = items[i];
alert(item.id);
}
I am not sure why, but the parser is just not liking that. How can I get it to parse?
Try items.length instead of items.count().
An array doesn't have a count method. Use the length property:
for (var i = 0; i < items.length; i++) {
Demo: http://jsfiddle.net/Guffa/Rt4db/
Below is the very good way to do:
var itemsRequest = '[{"id":"142"},{"id":"152"}]';
var items = eval(itemsRequest); //Converted to actual JSON data
for (var item in items) {
alert(items[item]['id']);
}
Hope this is very helpful, thanks
jQuery.get("ChkNewRspLive.php?lastmsgID=" + n, function(newitems){
//some code to separate values of 2d array.
$('#div1').append(msgid);
$('#div2').append(rspid);
});
Let's say the value of newitems is [["320","23"],["310","26"]]
I want to assign "320" and "310" to var msgid.
I want to assign "23" and "26" to var rspid.
How to do that?
I tried to display newitems and the output is "Array". I tried to display newitems[0] and the output is blank.
If I redeclare var newitems = [["320","23"],["310","26"]]; it works. So I guess the variable newitems from jQuery.get is something wrong. Is it I cannot pass the array from other page to current page through jQuery directly?
Regarding the array on other page, if echo json_encode($Arraytest); the output is [["320","23"],["310","26"]] but if echo $Arraytest; the output is Array. How do I pass the array from other page to currently page by jQuery.get?
I don't totally understand the question but I'm going to assume you want the values in an array, as two values can't be stored in one (scalar) variable simultaneously.
jQuery.get("ChkNewRspLive.php?lastmsgID=" + n, function(newitems){
//some code to separate values of 2d array.
var msgid = [],
rspid = [];
for( i = 0 ; i < newitems.length ; i++){
msgid[msgid.length] = newitems[i][0];
rspid[rspid.length] = newitems[i][1];
}
//msgid now contains ["320","310"]
//rspid now contains ["23","26"]
});
Bear in mind those are in the function scope. If you want to use them outside of that scope instantiate them outside. see: closure
You can use pluck from underscore.js: http://documentcloud.github.com/underscore/#pluck
var msgid = _(newitems).pluck(0)
var rspid = _(newitems).pluck(1)
Try this:
function getArrayDimension(arr, dim) {
var res = [];
for(var i = 0; i < arr.length; i++) {
res.push(arr[i][dim]);
}
return res;
}
var newitems = [["320","23"],["310","26"]];
var msgid = getArrayDimension(newitems, 0);
var rspid = getArrayDimension(newitems, 1);
msgid and rspid are arrays holding the 'nth' dimention.
Tnx