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I want to add array as json value.
Json format is as follows.
json_data = [
'name':'Testing'
'email':'TestEmail'
'links':[
'test#test.com',
'test#test1.com',
'test#test3.com']
]
How can I set value of 'links' in javascript like that?
I did as follows.
links_array = [];
links_array =['testing','test2'];
json_data.links = links_array;
I wanted to append these two string but couldn't.
Any help would be appreciate.
Assuming that the syntax of your example is correct, you can use the "push" method for arrays.
json_data = {
'name':'Testing',
'email':'TestEmail',
'links':[]
};
json_data.links.push("test1#test.com");
json_data.links.push("test2#test.com");
json_data.links.push("test3#test.com");
You have to make little changes to make it work.
First thing, You have to replace initial square brackets with curly one. By doing this your object will become JSON Literal - a key value pair.
Second thing, You have missed commas after 'name':'Testing' and 'email':'TestEmail'
Below will work perfectly:
var json_data = {
'name':'Testing',
'email':'TestEmail',
'links':[
'test#test.com',
'test#test1.com',
'test#test3.com']
}
In addition to push as mentioned by #giovannilobitos you can use concat and do it all in one go.
var json_data = {
'name':'Testing',
'email':'TestEmail',
'links':[
'test#test.com',
'test#test1.com',
'test#test3.com'
]
};
var links_array = ['testing','test2'];
json_data.links = json_data.links.concat(links_array);
console.log(json_data.links);
On MDN's array reference you can find a more complete list of how to modify arrays in JavaScript.
This is probably a very newbish question, but I am learning javascript and working with pouchDB. I have a search function that returns something like:
{"total_rows":1,"rows":[{"id":"mydoc","score":0.7071067811865475,"doc":{"title":"Guess who?","text":"It's-a me, Mario!","_id":"mydoc","_rev":"1-21bd9b0c99791947618e98a23134b312"},"highlighting":{"text":"It's-a me, Mario!"}}]}
I can access the total_rows value easily obviously, but how would I access the value of 'text'?
Simply with x.rows[0].doc.text.
Edit: To help you understand a little better what's happening here, you're accessing "sub children" with the . operator. We're asking for the rows array inside x and then specifying we want the first row (remember that arrays are 0-indexed, meaning the first element in an array is at position 0).
From there, we just access the doc child, and the text attribute it contains.
var obj = {"total_rows":1,"rows":[{"id":"mydoc","score":0.7071067811865475,"doc":{"title":"Guess who?","text":"It's-a me, Mario!","_id":"mydoc","_rev":"1-21bd9b0c99791947618e98a23134b312"},"highlighting":{"text":"It's-a me, Mario!"}}]};
console.log(obj.rows[0].doc.text);
Hi please cchecck this
var abc = {
"total_rows": 1,
"rows": [
{
"id": "mydoc",
"score": 0.7071067811865475,
"doc": {
"title": "Guess who?",
"text": "It's-a me, Mario!",
"_id": "mydoc",
"_rev": "1-21bd9b0c99791947618e98a23134b312"
},
"highlighting": {
"text": "It's-a me, Mario!"
}
}
]
}
console.log(abc.rows[0].doc.text);
console.log(abc.rows[0].highlighting.text);
it is better to identify each row by using 'id' to parse javascript object.
try this (javascript es6)
const obj = {"total_rows":1,"rows":[{"id":"mydoc","score":0.7071067811865475,"doc":{"title":"Guess who?","text":"It's-a me, Mario!","_id":"mydoc","_rev":"1-21bd9b0c99791947618e98a23134b312"},"highlighting":{"text":"It's-a me, Mario!"}}]}
const id = 'mydoc'
const text = obj.rows.find(item => item.id === id).doc.text
console.log(text)
javascript es5 or previous version
var obj = {"total_rows":1,"rows":[{"id":"mydoc","score":0.7071067811865475,"doc":{"title":"Guess who?","text":"It's-a me, Mario!","_id":"mydoc","_rev":"1-21bd9b0c99791947618e98a23134b312"},"highlighting":{"text":"It's-a me, Mario!"}}]};
var id = 'mydoc';
var text = obj.rows.find(function(item) { return item.id === id; }).doc.text;
console.log(text);
I'm having a problem getting an array of information stored properly as JSON.
I made a fiddle to illustrate the problem. Enter a set of tags and take a look at the console to see the output.
More explanation:
So I have an input that takes in a comma-separated list of tags, which I then format.
function createTagArray() {
// given an input value of 'tag1, tag2, tag3'
// returns array = ['tag1', 'tag2', 'tag3']
}
I thought what I needed to do next was the following:
loop over the array and create a 'tag' object for each item which also includes an id for the tag and the id of the contact the tag is associated with.
Each object is pushed to tags, an observable array.
function single_tag(id, contactId, tagLabel) {
var self = this;
self.id = id;
self.contactId = contactId;
self.tagLabel = tagLabel;
}
function createTags() {
var array = createTagArray();
for (var i = 0; i < array.length; i++) {
self.tags().push(new single_tag(uuid.generate(), self.contactId, array[i]));
}
}
Then, I converted it into JSON
self.contactInformation = function() {
return ko.toJS({
"id": self.contactId,
"firstname": self.firstname(),
"lastname": self.lastname(),
... other fields ...
"tags": self.tags(),
})
}
But, when I inspect the console output of calling this function, tags is a collection of arrays, not a nice json object.
How do I get it formatted correctly?
I tried this suggestion, and the tag json is structured correctly, but it is stored with escaped quotes, so that seems wrong.
Thanks for all the help!
I would recommend you knockout.mapping plugin for KO, it allow map complicated JSON structure to view model, even without declarations.
From the documentation
Let’s say you have a JavaScript object that looks like this:
var data = {
name: 'Scot',
children: [
{ id : 1, name : 'Alicw' }
]
}
You can map this to a view model without any problems:
var viewModel = ko.mapping.fromJS(data);
Now, let’s say the data is updated to be without any typos:
var data = {
name: 'Scott',
children: [
{ id : 1, name : 'Alice' }
]
}
Two things have happened here: name was changed from Scot to Scott and children[0].name was changed from Alicw to the typo-free Alice. You can update viewModel based on this new data:
ko.mapping.fromJS(data, viewModel);
And name would have changed as expected. However, in the children array, the child (Alicw) would have been completely removed and a new one (Alice) added. This is not completely what you would have expected. Instead, you would have expected that only the name property of the child was updated from Alicw to Alice, not that the entire child was replaced!
...
To solve this, you can specify which key the mapping plugin should use to determine if an object is new or old. You would set it up like this:
var mapping = {
'children': {
key: function(data) {
return ko.utils.unwrapObservable(data.id);
}
}
}
var viewModel = ko.mapping.fromJS(data, mapping);
In the jsfiddle you were using Knockout 3.0 which doesn't have support for textInput. This was added in 3.2. To use version 3.2 you need to use a cdn such as this: http://cdnjs.com/libraries/knockout
There was typeo in your binding. sumbit should be submit.
There was a problem with your constructor for single_tag. id was not used so I removed it:
function single_tag(contactId, tagLabel) {
var self = this;
self.contactId = contactId;
self.tagLabel = tagLabel;
}
Currently also contactId is not set because the observable has not been set to a value.
To convert to JSON you need to use ko.toJSON instead of ko.toJS:
self.contactInformation = function() {
return ko.toJSON({
"firstname": self.firstname(),
"tags": self.tags(),
})
}
Now when the console writes out an array appears:
{
"firstname":"test",
"tags":[
{"tagLabel":"test1"},
{"tagLabel":"test2"},
{"tagLabel":"test3"}
]
}
JsFiddle
So my problem was more basic than I was realizing. I'm using JSON Server to serve up my data, and I was pulling information from two parts of the database (contacts & tags).
When I tried to update my tags, I was trying to apply them to a property that didn't exist on the contact JSON in my database. Posting the tags separately worked though.
I have a JSON format object I read from a JSON file that I have in a variable called teamJSON, that looks like this:
{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"}]}
I want to add a new item to the array, such as
{"teamId":"4","status":"pending"}
to end up with
{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"},{"teamId":"4","status":"pending"}]}
before writing back to the file. What is a good way to add to the new element? I got close but all the double quotes were escaped. I have looked for a good answer on SO but none quite cover this case. Any help is appreciated.
JSON is just a notation; to make the change you want parse it so you can apply the changes to a native JavaScript Object, then stringify back to JSON
var jsonStr = '{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"}]}';
var obj = JSON.parse(jsonStr);
obj['theTeam'].push({"teamId":"4","status":"pending"});
jsonStr = JSON.stringify(obj);
// "{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"},{"teamId":"4","status":"pending"}]}"
var Str_txt = '{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"}]}';
If you want to add at last position then use this:
var parse_obj = JSON.parse(Str_txt);
parse_obj['theTeam'].push({"teamId":"4","status":"pending"});
Str_txt = JSON.stringify(parse_obj);
Output //"{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"},{"teamId":"4","status":"pending"}]}"
If you want to add at first position then use the following code:
var parse_obj = JSON.parse(Str_txt);
parse_obj['theTeam'].unshift({"teamId":"4","status":"pending"});
Str_txt = JSON.stringify(parse_obj);
Output //"{"theTeam":[{"teamId":"4","status":"pending"},{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"}]}"
Anyone who wants to add at a certain position of an array try this:
parse_obj['theTeam'].splice(2, 0, {"teamId":"4","status":"pending"});
Output //"{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"4","status":"pending"},{"teamId":"3","status":"member"}]}"
Above code block adds an element after the second element.
First we need to parse the JSON object and then we can add an item.
var str = '{"theTeam":[{"teamId":"1","status":"pending"},
{"teamId":"2","status":"member"},{"teamId":"3","status":"member"}]}';
var obj = JSON.parse(str);
obj['theTeam'].push({"teamId":"4","status":"pending"});
str = JSON.stringify(obj);
Finally we JSON.stringify the obj back to JSON
In my case, my JSON object didn't have any existing Array in it, so I had to create array element first and then had to push the element.
elementToPush = [1, 2, 3]
if (!obj.arr) this.$set(obj, "arr", [])
obj.arr.push(elementToPush)
(This answer may not be relevant to this particular question, but may help
someone else)
Use spread operator
array1 = [
{
"column": "Level",
"valueOperator": "=",
"value": "Organization"
}
];
array2 = [
{
"column": "Level",
"valueOperator": "=",
"value": "Division"
}
];
array3 = [
{
"column": "Level",
"operator": "=",
"value": "Country"
}
];
console.log(array1.push(...array2,...array3));
For example here is a element like button for adding item to basket and appropriate attributes for saving in localStorage.
'<i class="fa fa-shopping-cart"></i>Add to cart'
var productArray=[];
$(document).on('click','[cartBtn]',function(e){
e.preventDefault();
$(this).html('<i class="fa fa-check"></i>Added to cart');
console.log('Item added ');
var productJSON={"id":$(this).attr('pr_id'), "nameEn":$(this).attr('pr_name_en'), "price":$(this).attr('pr_price'), "image":$(this).attr('pr_image')};
if(localStorage.getObj('product')!==null){
productArray=localStorage.getObj('product');
productArray.push(productJSON);
localStorage.setObj('product', productArray);
}
else{
productArray.push(productJSON);
localStorage.setObj('product', productArray);
}
});
Storage.prototype.setObj = function(key, value) {
this.setItem(key, JSON.stringify(value));
}
Storage.prototype.getObj = function(key) {
var value = this.getItem(key);
return value && JSON.parse(value);
}
After adding JSON object to Array result is (in LocalStorage):
[{"id":"99","nameEn":"Product Name1","price":"767","image":"1462012597217.jpeg"},{"id":"93","nameEn":"Product Name2","price":"76","image":"1461449637106.jpeg"},{"id":"94","nameEn":"Product Name3","price":"87","image":"1461449679506.jpeg"}]
after this action you can easily send data to server as List in Java
Full code example is here
How do I store a simple cart using localStorage?
The code:
function updateDashboardData() {
$.getJSON("includes/system/ajaxDataInterface.php", {recordcount:1}, function(data) {
$('.stationContainer').each(function(data) {
var bsID = $(this).attr("id");
var bsStatus = $(this).children('.stationStatus');
alert(data[bsID][0].time);
bsStatus.find('.bs_maxHandsets').text(data[bsID][0].maxHandsets);
bsStatus.find('.bs_time').text(data[bsID][0].time);
});
});
}
The object data:
{
"A5A50000": [{
"bsid": "A5A50000",
"chanCount": 17,
"time": "2009-05-27 16:36:45",
"avgInterference": 1.711765,
"maxInterference": 4.97,
"avgHandsets": 205.1176,
"maxHandsets": 315,
"avgCalls": 6.4118,
"maxCalls": 13,
"avgCBA": 3868.98059,
"maxCBA": 7463,
"sumSuccessCBA": 197318,
"sumTimeoutHandoff": 133,
"sumAttemptHandoff": 1028,
"sumDeniedHandoff": 216,
"sumConfirmHandoff": 679,
"sumHandoffNetwork": 61873,
"sumJoinNetwork": 96888,
"sumLeaveNetwork": 93754,
"sumRcvdKeepalive": 98773,
"sumTimeoutKeepalive": 19748,
"sumAttemptUplink": 93689,
"sumBlockedUplink": 62453
}]
}
The problem:
alert(data.A5A50000[0].time); properly displays "2009-05-27 16:36:45".
alert(bsID); properly displays "A5A50000".
alert(data.bsID[0].time); reports "data.bsID is undefined".
alert(data[bsID][0].time); reports "data[bsID] is undefined".
I'm a little unclear when a variable is/isn't evaluated. Maybe I'm overlooking something silly, but I can't figure out my problem here.
You can access object properties by dot notation or by bracket notation.
var x = {'test': 'hi'};
alert(x.test); // alerts hi
alert(x['test']); // alerts hi
When you have a dynamic value, you have to use the latter:
var property = 'test';
alert(x.property); // looks for x.property, undefined if it doesn't exist
alert(x[property]); // looks for x['test'], alerts hi
So what you actually want is:
alert(data[bsID][0].time);
EDIT:
Not sure what you're doing wrong, but this is working for me on Firebug's console:
var data = {"A5A50000":[{"bsid":"A5A50000","chanCount":17,"time":"2009-05-27 16:36:45","avgInterference":1.711765,"maxInterference":4.97,"avgHandsets":205.1176,"maxHandsets":315,"avgCalls":6.4118,"maxCalls":13,"avgCBA":3868.98059,"maxCBA":7463,"sumSuccessCBA":197318,"sumTimeoutHandoff":133,"sumAttemptHandoff":1028,"sumDeniedHandoff":216,"sumConfirmHandoff":679,"sumHandoffNetwork":61873,"sumJoinNetwork":96888,"sumLeaveNetwork":93754,"sumRcvdKeepalive":98773,"sumTimeoutKeepalive":19748,"sumAttemptUplink":93689,"sumBlockedUplink":62453}]};
var bsID = 'A5A50000';
alert(data[bsID][0].time);
In Javascript, you can use either object or array-style notation to look up an attribute. The following are equivalent:
data.A5A50000
data['A5A50000']
With the second syntax, you can use a variable in place of an object string:
data[bsID][0]
I experienced the same problem with a nested JSON API-response:
[
{
"bj_code": "2019",
"BJ_PERIODE": [
{
"nummer": 1
},
{
"nummer": 2
}
]
}
]
I could evaluate:
pm.expect(pm.response.json()[0].BJ_PERIODE[1].nummer).to.eql(2);
But working with BJ_PERIODE and nummer through a variable didn't work.
Writing it with the bracket method did work, even in this nested JSON, like this:
const periode = "BJ_PERIODE";
const nr = "nummer";
pm.expect(pm.response.json()[0][periode][1][nr]).to.eql(2);