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Remove duplicates in array separated by double commas in JavaScript

I have an array in JavaScript like this
var data = [,A_1_VII,VII,V2,,A_1_VII,VII,V2,,A_1_VII,VII,V2,,B_1_XIV,XIV,V3,,B_2_XVI,XVI,V3]
when I alert in JavaScript it gives as below
,A_1_VII,VII,V2
,A_1_VII,VII,V2
,A_1_VII,VII,V2
,B_1_XIV,XIV,V3
,B_2_XVI,XVI,V3
But I want like this which is duplicates removed array
var unique_data = [,A_1_VII,VII,V2,,B_1_XIV,XIV,V3,,B_2_XVI,XVI,V3]
On alert it should give like this
,A_1_VII,VII,V2
,B_1_XIV,XIV,V3
,B_2_XVI,XVI,V3

First Thing your array contains string as a constant that's not going to work.
Secondly, if all of you value are strings you can do it as follows:
var data =[,"A_1_VII","VII","V2",,"A_1_VII","VII","V2",,"A_1_VII","VII","V2",,"B_1_XIV","XIV","V3",,"B_2_XVI","XVI","V3"];
var uniqueArray = data.filter(function(item, pos) {
return data.indexOf(item) == pos;
})
alert(uniqueArray);

Assuming the variables in your array are well defined, you can clean it up and remove duplicates with a for loop:
var data [/* ... */];
var unique_data = [];
for(let i = 0; i < data.length; i++) {
if (data[i] && unique_data.indexOf(data[i]) === -1) {
unique_data.push(data[i]);
}
}
Please note that the code above assumes that your array contains non-object types, otherwise the solution would need to use something more sophisticated than indexOf().

You can create your unique function to remove duplicate entry and empty value from array like this.
var data =[,"A_1_VII,VII","V2,,A_1_VII","VII","V2",,"A_1_VII","VII","V2",,"B_1_XIV,XIV","V3",,"B_2_XVI,XVI,V3"]
var unique_data = uniqueList(data);
alert(unique_data);
function uniqueList(list) {
var uniqueResult = [];
$.each(list, function(i, e) {
if ($.inArray(e, uniqueResult) == -1 &&$.inArray(e, uniqueResult)!="")// chech for unique value and empty value
uniqueResult.push(e);
});
return uniqueResult ;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

How to get localStorage array data.

I am new to localStorage. I set array in localstorage so how can get this value. My code as below.
$scope.lineItemID = data.id;
var itemtemp={
"itemid": data.id,
"qty": $scope.quantity
};
var itemqty=JSON.parse(localStorage.getItem("itemqty")) || [];
itemqty.push(itemtemp);
localStorage.setItem("itemqty", JSON.stringify(itemqty));
So my question is how can I get itemqty.qty as per itemid from localstorage

try Below code
$.each(data.itemqty, function(index, item) {
// append data using html //use item.name
});
OR try below
$.each(data, function(idx, item){
// append data using html
//
});

You are quite simply creating an array of objects itemqty and saving it in the browser's storage. When you do this:
var itemqty=JSON.parse(localStorage.getItem("itemqty")) || [];
//itemqty is available to you as an array of objects.
Suppose you are looking for the associated quantity for some itemid stored in the variable foo. You just need to traverse the parsed itemqty like so:
$.each(itemqty, function( index, value ) {
if(value.itemid == foo)
{
console.log(value.qty);
// value.qty is the required quantity
}
});

items=JSON.parse(localStorage.getItem('itemqty'));
for (var i = 0; i < items.length; i++) {
if(items[i].itemid === itmId) {
return items[i].qty;
}
}
I am using it & it's working

Javascript get the name of the object after parsing from JSON

Consider the following JSON string:
[{"ElementID1":{"latitude":"10.02483","longitude":"70.753464"}},{"ElementID2":{"latitude":"10.029301","longitude":"70.751892"}},{"ElementID3":{"latitude":"10.029568","longitude":"70.751856"}}]
Which is contained in the "data" variable:
var response = JSON.parse(data);
How do I go through this result?
It is clear for me that I can access this first as an array:
for(var element in response)
{
}
But I don't know what "ElementID1" will be. It can be any string so i cant just do something like
element.elementID.latitude
To retrieve the object latitude. And i would also like to be able to get that picture id itself.
I think this is a simple question but i have tried googling for the answer for a while without any progress.

var data = [{"ElementID1":{"latitude":"10.02483","longitude":"70.753464"}},
{"ElementID2":{"latitude":"10.029301","longitude":"70.751892"}},
{"ElementID3":{"latitude":"10.029568","longitude":"70.751856"}}];
for(var i = 0; i < data.length; i++) {
var obj = data[i];
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
console.log(obj[key].latitude);
}
}
}
DEMO
Basically, you need to access each data array element, which is an object in this case, and since you don't know the name of ElementID* for each element, you can loop through the properties of this object looking for the desired one, latitude in this case.

You can do the following:
response.forEach(function(response){
for (var element in response){
var picutureId = element;
var latitude = value[element].latitude;
var longitude = value[element].longitude;
// at this point you can manipulate the pictureId, latitude, and longitude of each object
}
})
Loop through the results array, loop through each object's key/val pair and manipulate the data from there.

If even latitude and longitude attribute names are unknown
for (var index in data) { //Iterate through array
var obj = data[index];
for (var prop in obj) { //Iterate through ElementId object
console.log(prop); //Print ElementID
var latlongObj = obj[prop];
for (var key in latlongObj) { //Iterate through latlong object
console.log(key); //Print lattitude/longitude
console.log(latlongObj[key]); //Print value
}
}
}

Map values from external json lookup into array as new key/value pairs

I am trying to map new values (from an external json file) into an array (array of arrays or KV pairs, generated from a php file query to mysql) in javascript/jQuery.
The structure of the array is:
"results":
[{"gender":"Male","DOB":"1993-09-22","location":"Main","procCode":"43653","preopDx1":"783.3","procedDate":"2008-06-02"},{"gender":"Female","DOB":"2001-11-07","location":"South","procCode":"11403","preopDx1":"216.5","procedDate":"2010-01-01"},...]
The json file looks like this:
[
{
"CPT": "10021",
"RVU": "1.27"
},
{
"CPT": "10022",
"RVU": "1.27"
}
]
The idea is to
a) Loop thru the myarray values and find each procCode
b) Match this procCode with the identical cpt code in the json file, and
c) Attach each new key/value pair to each 'row' of myarray
function addRVU (myarray, myjson){
var newObj = $.map(myarray, function (i,res){
if(myarray[i].procCode == myjson[i].CPT){
return myarray[i].RVU = myjson[i].RVU;
}
}
}
Thanks in advance!

// First, convert JSON file into an object keyed off CPT code:
var jsonObj = {};
for (var i = 0; i < json.length; i++) {
jsonObj[json[i].CPT] = json[i];
}
// Now update myarray elements
for (i = 0; i < myarray.length; i++) {
// $.extend copies properties from 2nd object into 1st object
$.extend(myarray[i], jsonObj[myarray[i].procCode]);
}

for if(myarray[i].procCode == myjson[i].CPT), you only matched the json and array with same index. loop to match all element in json should fix your problem.
or something like using a hash to map the RVU
h = {};
$.each(json, function(i, e){
h[e.CPT] = e.RVU;
});
$.each(ar, function(i, e){
e.RVU = h[e.procCode];
});

Replace Element in JSON with a element in a Javascript array

I have this JSON
[{"id":7,"serial":"7bc530","randomDouble":0.0,"randomDouble2":0.0,"randomDouble3":0.0,"date":1352228474000,"removed":null},
{"id":8,"serial":"4a18d27","randomDouble":0.0,"randomDouble2":0.0,"randomDouble3":0.0,"date":1352228474000,"removed":null},
{"id":9,"serial":"f30ef","randomDouble":0.0,"randomDouble2":0.0,"randomDouble3":0.0,"date":1352228474000,"removed":null},
{"id":10,"serial":"9e6d","randomDouble":0.0,"randomDouble2":0.0,"randomDouble3":0.0,"date":1352228474000,"removed":null},
{"id":11,"serial":"4d8665a3","randomDouble":0.0,"randomDouble2":0.0,"randomDouble3":0.0,"date":1352228474000,"removed":null},
{"id":12,"serial":"4fe1457","randomDouble":0.0,"randomDouble2":0.0,"randomDouble3":0.0,"date":1352228474000,"removed":null}]
and I have this JSON
{"computers":[{"id":"7bc530","name":"Dell","description":"Dell"},
{"id":"f30ef","name":"HP","description":"HP"},
{"id":"9e6d","name":"Compaq","description":"Compaq"},
{"id":"4d8665a3","name":"Toshiba","description":"Toshiba"},
{"id":"4fe1457","name":"Asus","description":"Asus"},
{"id":"4a18d27","name":"Acer","description":"Acer"}]}
I want to replace the "serial" element in the first JSON with the "Description" in this one. The reason why I need it in one JSON is that I am using a DataTable and I can only pass one JSON in.
I'm not sure how I can do this in Javascript / JQuery?

You can accomplish this without any jQuery by setting up small function:
(see the demo fiddle)
function replaceSerial (data1, data2) {
var descs = {}, computers = data2['computers'], final = data1;
for (var i = 0; i < computers.length; i++ ) {
descs[computers[i]['id']] = computers[i]['description'];
}
for (var i = 0; i < data1.length; i++) {
final[i]['serial'] = descs[data1[i]['serial']];
}
return final;
}
Then just save your two pieces of JSON into variables and invoke the function:
var json1, json2, mergedJson;
json1 = // DATA IN FIRST JSON;
json2 = // DATA IN SECOND JSON;
mergedJson = replaceSerial (json1, json2);

Assuming your first object is called to and the second object is called from
// Iterate over each entry in to
to.forEach(function(value) {
// In each iteration find elements in from where the id is the same
// as the serial of the current value of to
var description = from.computers.filter(function(element){
if (element.id == value.serial) return true;
});
// Copy description of first found object in the description property of
// the current object
value.description = description[0].description;
// Unset serial?
delete value.serial;
});
DEMO