Develop Reference

Updating the value of an object inside a loop using javascript

I'm currently facing a difficulty in my codes.
First i have an array of objects like this [{Id:1, Name:"AML", allowedToView:"1,2"}, {Id:2, Name:"Res", allowedToView:"1"}...] which came from my service
I assign it in variable $scope.listofResource
Then inside of one of my objects I have that allowedToView key which is a collection of Id's of users that I separate by comma.
Then I have this code...
Javascript
$scope.listofResource = msg.data
for (var i = 0; i < msg.data.length; i++) {
First I run a for loop so I can separate the Id's of every user in allowedToView key
var allowed = msg.data[i].allowedToView.split(",");
var x = [];
Then I create a variable x so I can push a new object to it with a keys of allowedId that basically the Id of the users and resId which is the Id of the resource
for (var a = 0; a < allowed.length; a++) {
x.push({ allowedId: allowed[a], resId: msg.data[i].Id });
}
Then I put it in Promise.all because I have to get the Name of that "allowed users" base on their Id's using a service
Promise.all(x.map(function (prop) {
var d = {
allowedId: parseInt(prop.allowedId)
}
return ResourceService.getAllowedUsers(d).then(function (msg1) {
msg1.data[0].resId = prop.resId;
Here it returns the Id and Name of the allowed user. I have to insert the resId so it can pass to the return object and it will be displayed in .then() below
return msg1.data[0]
});
})).then(function (result) {
I got the result that I want but here is now my problem
angular.forEach(result, function (val) {
angular.forEach($scope.listofResource, function (vv) {
vv.allowedToView1 = [];
if (val.resId === vv.Id) {
vv.allowedToView1.push(val);
I want to update $scope.listofResource.allowedToView1 which should hold an array of objects and it is basically the info of the allowed users. But whenever I push a value here vv.allowedToView1.push(val); It always updates the last object of the array.
}
})
})
});
}
So the result of my code is always like this
[{Id:1, Name:"AML", allowedToView:"1,2", allowedToView:[]}, {Id:2, Name:"Res", allowedToView:"1", allowedToView:[{Id:1, Name:" John Doe"}]}...]
The first result is always blank. Can anyone help me?
Here is the plunker of it... Plunkr

Link to the solution - Plunkr
for (var i = 0; i < msg.length; i++) {
var allowed = msg[i].allowedToView.split(",");
msg[i].allowedToView1 = [];
var x = [];
Like Aleksey Solovey correctly pointed out, the initialization of the allowedToView1 array is happening at the wrong place. It should be shifted to a place where it is called once for the msg. I've shifted it to after allowedToView.split in the first loop as that seemed a appropriate location to initialize it.

Split json data using comma

I have a json which has a key "tag", which is returning data like this
"tags": "jname,gender,city"
but i want to append these value in separate span like below
<div class="info">
<span>jname</span><span>gender</span><span>city</span>
</div>
I am trying with this
$.getJSON("data.json", function(tagsposts) {
var items = [];
splitsVal = tag.split(",");
for (var i = 0; i < splitsVal.length; i++) {
obj.push({name:splitsVal[i]});
obj[i] = '<span>' + obj[i] + '</span>';
$('.tags-div').append(obj[i])
}
$.each(tagsposts, function(key, val) {
items.push('' + val['tags'] + '');
});
$('#tagsposts').append(items.join(""));
});
Am I doing correct

You're trying to split an undefined variable:
function(tagsposts) {
var items = [];
splitsVal = tag.split(","); // but tag doesn't exist...
(If you look at your browser console, which you should get into the habit of doing, you'll get a very clear message about why this isn't working: "ReferenceError: Can't find variable: tag".)
Since you haven't provided your JSON it's not possible to say exactly how to fix this. Assuming the full JSON is of the form
{"tag": "foo,bar,baz"}
then you would want
splitsVal = tagsposts.tag.split(",")
If there's more structure than that inside the JSON, you'll need to crawl down through that parsed object to find the "tag" value(s) you need.
There are lots of other problems here, however.
You also try to push onto an undefined array named obj; you'd need at least a var obj = [] outside that for loop. Though it's not clear why you're using obj at all, or trying to draw an object {name: val} into the DOM instead of just the value. What you're trying to do is just read splitsVal[i] so you can just do this:
for (var i = 0; i < splitsVal.length; i++) {
$('.tags-div').append('<span>'+splitsVal[i]+'</span>')
}
And you try to iterate over tagsposts as if it's an array when generating the #tagsposts contents. (Is your JSON an array? If so you need to iterate over it when getting the tag values too.)

Look for item value in localstroge

I have a $localstroge with the below stored value:
{"EmployerDetails":{"Distance":30,"EmpLatitude":51.3353899,"EmpLongitude":-0.742856,"EmpNo":39424,"Insitution":null,"PlaceName":"Camberley","TalentPoolLicences":[{"Membership":[{"Identity":39424,"Name":"Weydon Secondary School"}],"TalentPoolType":1},{"Membership":[{"Identity":2,"Name":"North East Hampshire"},{"Identity":4,"Name":"Surrey"},{"Identity":8,"Name":"Surrey"}],"TalentPoolType":3}]},"FacetFilters":{"LastActivity":0,"LocationFilterType":1,"fullorparttime_pex":null,"religion":null,"soughtphase_swk":null,"soughtrole_swk":null,"soughtsubject_swk":null},"LookingFor":null,"OrderBy":null,"PageIndex":1,"PageSize":40}
How can I get the Identity value out from it that sits inside EmployerDetails. I have tried below but it never gets inside if condition:
for (var i = 0; i < localStorage.length; i++) {
if (localStorage.getItem(localStorage.key(i)) === 'EmployerDetails')
{ console.log('hello'); }
}
Any help on this please?

As you're searching for nested key first you need to grab the object and also need to parse it to JSON with JSON.parse then you can proceed as we do in case on normal javascript object
localStorage.getItem('signup-prefs')
This gives me a string containing my object
""name":"google","oauth_version":"2.0","oauth_server":"https://accounts.google.com/o/oauth2/auth","openid":"","username":""}"
After parsing it we can get the object and now we can find the desired property.
JSON.parse(localStorage.getItem('signup-prefs'))
Object {name: "google", oauth_version: "2.0", oauth_server: "https://accounts.google.com/o/oauth2/auth", openid: "", username: ""}
Coming to your problem
Let's say your employee information is like this i am not showing all the fields here.
var empData = {"EmployerDetails":Distance":30,"EmpLatitude":51.33538}}
Then you set the key like this
localstorage.setItem('empData', JSON.stringify(empData))
Now get the string object by key parse it to Json and find the desired key from the object loop over it to get the result.I haven't tested it but i am confident it will work. Let me know if not.
for (var i = 0; i < localStorage.length; i++) {
if (localStorage.key(i) === 'empData') {
// Parse the string to json
var empData = JSON.parse(localStorage.getItem('empData'));
// get all the keys
var keys = Object.keys(empData);
for (var idx = 0; idx < keys.length; idx++) {
// find the desired key here
if (keys[idx] == 'EmployeeDetails') {
var empDetails = empData[keys[idx]]
}
}
}
}
One important thing about your code is
this statement localStorage.key(i)) === 'EmployerDetails' returns either true or false and writing like this
if(localStorage.getItem(localStorage.key(i)) === 'EmployerDetails') will never was executed because you didn't have any key with that name(In practice we should never use keyword as key) .

Did you try to convert it to the json object and then gets the values out?

Google Sites Listitem

I am working with the google sites list item.
The classes are Here and Here
I have been able to iterate through the columns and put all of the column headers in to one array with the following code.
//Global
var page = getPageByUrl(enter URL here)
var name = page.getName();
function getInfo() {
var columns = page.getColumns();
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
}
Now I want to be able to get each row of the listitem and put it in its own array.
I can add the variable
function getInfo() {
var columns = page.getColumns();
var listItems = page.getListItems();//new variable
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
}
Now that I have the variable the output is [ListItem, ListItem, ListItem, ListItem]
So I can use a .length and get a return of 4.
So now I know I have 4 rows of data so based on my wants I need 4 arrays.
Small interjection here, Not a coder by trade but code as a precursor to wants becoming needs.
A buddy of mine who is a JS coder by trade showed me this code which does work. With the logger added by me.
for (var i in listItems) {
if (listItems.hasOwnProperty(i)) {
item = listItems[i];
for (var x = 0; x < columnList.length; x++) {
attrib = item.getValueByName(columnList[x]);
Logger.log("Logging value of get list page get value by name = " + columnList[x] + " " + attrib);
}
}
}
Which brings the total code to
var name = page.getName();
var listItems = page.getListItems();
var listCount = listItems.length
var listList = [];
var columns = page.getColumns();
var name = columns[0].getName();
var item, attrib = 0;
var columnList = [];
Logger.log(listItems);
Logger.log(name + " was last updated " + page.getLastUpdated());
Logger.log(name + " was last edited " + page.getLastEdited());
var listCount = 0;
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
Logger.log(columnList);
// Get index of Due Date
var dueDateValue = columnList.indexOf("Due Date");
Logger.log("The index of due date is " + dueDateValue);
for (var i in listItems) {
if (listItems.hasOwnProperty(i)) {
item = listItems[i];
for (var x = 0; x < columnList.length; x++) {
attrib = item.getValueByName(columnList[x]);
Logger.log("Logging value of get list page get value by name = " + columnList[x] + " " + attrib);
}
}
}
}`
Forgive the above code as it has been a bit of a sketch pad trying to work this out.
I am a bit behind on understanding what is happening here
for (var i in items) { // This is for each item in the items array
if (items.hasOwnProperty(i)) {
if items is an array, how can we use has own property? Doesn't that belong to an object? Does an array become an object?
My questions are two category fold.
Category # 1
What is happening with the hasOwnProperty?
-Does the array become an object and thus can be passed to .hasOwnProperty value
Category # 2
Is this the only way to take the values from the listitem and populate an array
- If it is, is there some way to delimit so I can pass each row into it's own array
- If it isn't , why does it work with the hasOwnProperty and why doesn't it work without it in the example below
for (var i in listItems) {
for (var y = 0; y < columnList.length; y++) {
item = listItems[i];
listList = item.getValueByName(columnList[x]);
Logger.log("Logging my version of list naming " + listList);
}
In which I get a "Invalid argument: name (line 41" response. Highlighting the
listList = item.getValueByName(columnList[x]);
Not looking for a handout but I am looking to understand the hasOwnPropertyValue further.
My current understanding is that hasOwnValue has to do with prototyping ( vague understanding ) which doesn't seem to be the case in this instance
and it has to depend on a object which I described by confusion earlier.
To clarify my want:
I would like to have each row of listitems in its own array so I can compare an index value and sort by date as my current column headers are
["Project", "Start Date" , "End Date"]
Any and all help is much appreciated for this JS beginner of 2 weeks.

An array can be inside of an object as the value of a member:
{"myFirstArray":"[one,two,blue]"}
The above object has one member, a name/value pair, where the value of the member is an array.
Here is a link to a website that explains JSON.
Link To JSON.org
JSON explained by Mozilla
There are websites that will test the validity of an object:
Link to JSONLint.com
An array has elements, and elements in an array can be other arrays. So, there can be arrays inside of arrays.
.hasOwnProperty returns either true or false.
Documentation hasOwnProperty
Interestingly, I can use the hasOwnProperty method in Apps Script on an array, without an error being produced:
function testHasProp() {
var anArrayTest = [];
anArrayTest = ['one', 'two', 'blue'];
Logger.log(anArrayTest);
var whatIsTheResult = anArrayTest.hasOwnProperty('one');
Logger.log(whatIsTheResult);
Logger.log(anArrayTest);
}
The result will always be false. Using the hasOwnProperty method on an array doesn't change the array to an object, and it's an incorrect way of using Javascript which is returning false.
You could put your list values an object instead of an array. An advantage to an object is being able to reference a value by it's property name regardless of where the property is indexed. With an array, you need to know what the index number is to retrieve a specific element.
Here is a post that deals with adding properties to an object in JavaScript:
StackOverflow Link
You can either use dot notation:
objName.newProperty = 'newvalue';
or brackets
objName["newProperty"] = 'newvalue';
To add a new name/value pair (property) to an object.

Get value of JSON object with inner objects by HTML form field name without eval

I have a problem like this Convert an HTML form field to a JSON object with inner objects but in to the other direction.
This is the JSON Object response from the server:
{
company : "ACME, INC.",
contact : {
firstname : "Daffy",
lastname : "Duck"
}
}
And this is the HTML form:
<form id="myform">
Company: <input type="text" name="company" />
First Name: <input type="text" name="contact.firstname" />
Last Name: <input type="text" name="contact.lastname" />
</form>
And this is the (pseudo)code:
var aFormFields;
for (var i = 0, iMax = aFormFields.length; i < iMax; i++) {
var sFieldName = aFormFields[i].getAttribute('name');
eval("sFieldValue = oResponse."+sFieldName);
}
Ok my solution works, but i looking for a good way to remove the evil eval from the code.
And the solution should also work for form fields with any count of dots in the field name.

Instead of:
eval("sFieldValue = oResponse."+sFieldName);
Use for single dotted fields:
sFieldValue = oResponse[sFieldName];
This will retrieve the value via its key.
Now if you need more than that you need to do the following:
Split sFieldName on .
Loop over that array and go down in oResponse till you reach the value that you desire
Code could look like this:
var node = oResponse, parts = sFieldName.split('.');
while(parts.length > 0) {
node = node[parts.shift()];
}
// node will now have the desired value
Further information on "Member Operators":
https://developer.mozilla.org/en/JavaScript/Reference/Operators/Member_Operators

This works for a single property:
sFieldValue = oResponse[sFieldName]
But it won't work for nested data like contact.firstname.
For that, split the name by dots, and use loop through each name:
var aFormFields;
for (var i = 0, iMax = aFormFields.length; i < iMax; i++) {
var aFieldNameParts = aFormFields[i].getAttribute('name').split(".");
var oFieldValue = oResponse;
for(var j=0; j<aFieldNameParts.length; j++) {
oFieldValue = oFieldValue[aFieldNameParts[j]];
}
var sFieldValue = oFieldValue;
}
Note: if a property does not exist, an error will occur. You might want to check whether oFieldValue[ aFieldNameParts[j] ] exists or not.

While it is possible, I wouldn't loop over the input fields, but over the JSON object:
function fillForm (form, data, prefix) {
prefix = prefix ? prefix + "." : "";
for (var x in data) {
if (typeof data[x] === "string") {
var input = form.elements[prefix + x];
if (input)
input.value = data[x];
} else
fillForm(form, data[x], prefix + x);
}
}
fillForm(document.getElementById("myform"), oResponse);
(untested)

Assuming your naming scheme is consistent, you can convert the dot-notation into subscripts. You'd have to split the field name on the period and iterate or recurse over the tokens, converting each into a subscript. Of course this assumes that oResponse always contains a value for every field.
for (var i = 0; i < aFormFields.length; i++) {
var sFieldName = aFormFields[i].getAttribute('name');
var tokens = sFieldName.split('.');
var cur = oResponse;
for (var j = 0; j < tokens.length; j++) {
cur = cur[tokens[j]];
}
sFieldValue = cur;
}

please treat this as a combination of answer and question :)
i am currently trying to get my server to jsonify the data that i get sent from a form just like you...
in my case the form will in the end create a json object with multiple subobjects that can have subobjects which can have... as well.
the depth is up to the user so i should be able to support infinite recursion.
my "solution" so far just feels wrong, but it correctly does the job,
the function getRequestBody gets fed a req.body object from expressjs,
this is basically an object with the following mapping:
{
"ridic-ulously-deep-subobject": "value",
"ridic-ulously-deep-subobject2": "value",
"ridic-ulously-deep2-subobject3": "value",
}
the following html is in use:
<form>
<input name="ridic-ulously-long-class-string" value="my value" />
</form>
and the javascript function (that should work genericly, feed it a req.body object like above and it will return a json object):
function getRequestBody(reqB){
var reqBody = {};
for(var keys in reqB) {
var keyArr = keys.split('-');
switch(keyArr.length){
case 1:
if(!reqBody[keyArr[0]]) reqBody[keyArr[0]] = {};
reqBody[keyArr[0]] = reqB[keys];
break;
case 2:
if(!reqBody[keyArr[0]]) reqBody[keyArr[0]] = {};
if(!reqBody[keyArr[0]][keyArr[1]]) reqBody[keyArr[0]][keyArr[1]] = {};
reqBody[keyArr[0]][keyArr[1]] = reqB[keys];
break;
case 3:
if(!reqBody[keyArr[0]]) reqBody[keyArr[0]] = {};
if(!reqBody[keyArr[0]][keyArr[1]]) reqBody[keyArr[0]][keyArr[1]] = {};
if(!reqBody[keyArr[0]][keyArr[1]][keyArr[2]]) reqBody[keyArr[0]][keyArr[1]][keyArr[2]] = {};
reqBody[keyArr[0]][keyArr[1]][keyArr[2]] = reqB[keys];
break;
case 4:
// ...
//and so on, always one line longer
}
return reqBody;
}
this just feels wrong and its only covering 5 levels of subobjects right now,
it might happen that an application has enough functionality to reach seven or even ten levels though.
this should be a common problem, but my search effort turned up nothing within 10 minutes,
which usually means that i am missing some keywords
or
that there is no viable solution [yet] (which i cant really imagine in this case).
is there someone out there who has imagination and logic sufficient enough to unspaghettify this or will i just have to expand this function with even more clutter to get me down to 10 possible sublevels?
i think that in the end it wont make a big difference performance wise,
but i would really like NOT to create this awful behemoth :D
have fun
jascha