We Keep Coding

javascript - JSON file use a value only if key exists

I'm retrieving an OSM Json from an overpass call, to obtain a list of features that I have to save on a database. Since the data are very different from one another (for example, some of them do have a a tag called "addr:city", and some of them not), I would like to check if a key exists, and only in that case save the corresponding value. I've found only this question but it's not my case, since I do not know a priori which keys one element will have and which not, and since I'm working with a great load of data, I really can't check the elements one by one and of course I can't write an IF for each case.
Is there a way to solve this? I was thinking something about "if key has null value, ignore it", while looping over the elements, but I don't know if something like that exists
EDIT:
This is my query:
https://overpass-api.de/api/interpreter?data=[out:json][timeout:25];(node[~%22^(tourism|historic)$%22~%22.%22](44.12419,%2012.21259,%2044.15727,%2012.27696);way[~%22^(tourism|historic)$%22~%22.%22](44.12419,%2012.21259,%2044.15727,%2012.27696););out%20center;
and this is the code I'm using to save the data on firebase:
results.elements.forEach(e=>{
var ref = firebase.database().ref('/point_of_interest/');
var key = firebase.database().ref().child('point_of_interest').push().key;
var updates = {};
var data = {
città: e.tags["addr:city"],
tipologia: e.tags["amenity"],
indirizzo: e.tags["addr:street"],
nome: e.tags["name"],
lat: e.lat,
lon: e.lon
}
updates['/point_of_interest/'+key] = data;
firebase.database().ref().update(updates);
})
"results" is the response in json format

You could use something like that:
var attrs = ["addr:city", "amenity", "addr:street", "name"];
var labels = ["città", "tipologia", "indirizzo", "nome"]
var data = { };
attrs.forEach((a, i) => {
if (e.tags[a]) { data[labels[i]] = e.tags[a]; }
});
You could even make this more dynamic, if you can query the attribute names and labels from somewhere.

Delete a field from Firestore, with a dynamic key

I am trying to delete a single field from a Document in Firestore
The Key of the field is held in a variable e.g.
var userId = "random-id-1"
In the document I have a field of members structured like this:
{
members:{
random-id-1:true,
random-id-2:true
}
}
I would like to delete random-id-1:true, but keep random-id-2:true
How is this possible without getting the entire members object and writing an updated object?
I have tried this, however I get the error: Document references must have an even number of segments
and I also tried this:
db.collection('groups').doc(this.props.groupId).set({
members: {
[userId]: firebase.firestore.FieldValue.delete()
}
},{merge: true})
However I get the error: Function DocumentReference.update() called with invalid data. FieldValue.delete() can only appear at the top level of your update data
Thanks for any help

I have managed to delete a field like this:
let userId = "this-is-my-user-id"
let groupId = "this-is-my-group-id"
db.collection('groups').doc(groupId).update({
['members.' + userId]: firebase.firestore.FieldValue.delete()
})
This is using the dot operator method described here
Please let me know if there are any alternative methods to this
Thanks

I had to import FieldValue
https://firebase.google.com/docs/firestore/manage-data/delete-data#fields
// Get the `FieldValue` object
var FieldValue = require('firebase-admin').firestore.FieldValue;
// Create a document reference
var cityRef = db.collection('cities').doc('BJ');
// Remove the 'capital' field from the document
var removeCapital = cityRef.update({
capital: FieldValue.delete()
});

Webdriver JS - Store sendKeys to variable and reuse

Currently I have a form with 10 fields that I need to do sendkeys > store the value and after assert this value when save the form. For each of these fields I need to create a function and store the value in a variable or is there a better way?
My actual code:
var email = driver.findElement(By.name('email'));
email.sendKeys('info#domain.com');
email.getAttribute("value").then(function(email_text) {
var email = email_text;
});
Cheers,
Rafael

If I understand correct, the process looks like you should fill some fields, remember their values and check values after the form has been submitted.
There is no one standard decision for tasks like this, it depends on developer.
So, we know which values we need and can store it for example in map
{
'email':'example#email.com',
'telephone':111222333
}
Key is name for finding element, value - for sendKey and checkValue methods.
You should write two methods, which will work with test data map and will fill inputs and check values in cycle by map keys.

Do you mean you want to do this as an array?
// you can represent each field as an object
var fields = [
{ elementName: 'email', expectedText: 'info#domain.com' },
{ elementName: 'password', expectedText: 'bla bla bla' }
];
// sendKeys to each field with the specified text
fields.forEach(function(field) {
browser.driver.findElement(by.name(field.elementName)).sendKeys(field.expectedText);
});
// to get all the field text (from promises) and store it as an array
browser.controlFlow().execute(function() {
var textArray = [];
fields.forEach(function(field) {
browser.driver.findElement(by.name(field.elementName)).getAttribute('value').then(function(actualText) {
textArray.push({elementName: field.elementName, actualText: actualText});
});
});
return textArray;
}).then(function(storedTextArray) {
// do something with the stored text array here
});

Print json object from local storage

i need to print an array of json object which are been entered by user through text box, this function is executed by button click. i need to store all the string localy that are entered by the user in text box. and display it in my console in this formate [{"aaa"},{"bbb"},{"ccc"}]
<!DOCTYPE html>
<html>
<body>
Enter the string :
<input type="text" id="names">
<button onclick="myFunction()"> Click Me</button>
<script>
function myFunction(){
var myNames = new Array();
myNames = document.getElementById("names").value;
this.names = myNames;
localStorage["myNames"] = JSON.stringify(myNames);
console.log(JSON.stringify(myNames));
var name = JSON.parse(localStorage["myNames"]);
console.log(name);
};
</script>
</body>
</html>
Currently this code just print the data like this "aaa", if i add another data bbb, only the 2nd data "bbb"is displayed. i want all the data to be viewed in this formate [{"aaa"},{"bbb"},{"ccc"}] or even like this [{"name":"aaa"},{"name":"bbb"},{"name":"ccc"}] .
Could someone help me?

That's not related to localStorage or JSON.
When you perform myNames = document.getElementById("names").value; you replace the empty Array with a string.
You may use .push on array : https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/push
And create an object then pushing it, for example myObj = {'v': value}; myArray.push(myObj);

you can try this:
var myNames = []
function myFunction(){
var oldItems = JSON.parse(localStorage.getItem('myNames')) || [];
newItem = {"name":document.getElementById("names").value};
oldItems.push(newItem);
localStorage.setItem("myNames", JSON.stringify(oldItems));
console.log(JSON.parse(localStorage.getItem("myNames")));
};

If you want to preserve the previously entered data, you have to retrieve them first and alter them.
Below are two functions; one that adds an item to the array. If the array isn't present yet (so no data has been entered previously), it creates a new array for you.
Afterwards it stores the data in the localStorage again.
Upon entering new data that needs to be added, it first retrieves any previous entries and alters that. Then it stores again and so on and so on.
function myFunction(){
var myNames = localStorage.getItem('myNames'),
parsedArray = JSON.parse(myNames),
valueToAdd = document.getElementById("names").value;
// Add the new item to the original array.
parsedArray = addToArray(parsedArray, valueToAdd);
localStorage.setItem('myNames', JSON.stringify(parsedArray));
console.log(parsedArray);
};
function addToArray (array, item) {
// If the array doesn't exist, create one
if (!array) {
array = [];
}
// Add the item to the array.
array.push(item);
return array;
};

How to append database values to JSON data

I have a JSON which lists the values from database. Below is the JSON data of 2 rows from the database.
[{"Name":"P1","Description":"pd1","Value":"v1","Attribute":"a1"},{"Name":"P1","Description":"pd1","Value":"v2","Attribute":"a2"}]
database values are the result of a left join query. Only 'Value' and 'Attribute' fields are different. Can I append that fields to JSON instead of multiple sets of record? I know there is 'push' to do this, but I am unaware where and how to use this in my code. below is the code for fetching values from db and serializing the values.
GetProfileDataService GetProfileDataService = new BokingEngine.MasterDataService.GetProfileDataService();
IEnumerable<ProfileData> ProfileDetails = GetProfileDataService.GetList(new ProfileSearchCriteria { Name = strProfileName });
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
string strSerProfileDetails = javaScriptSerializer.Serialize(ProfileDetails);
context.Response.ContentType = "text/json";
context.Response.Write(strSerProfileDetails);
Below is my getJSON
$(document).ready(function () {
$.getJSON('ProfileHandler.ashx', { 'ProfileName': 'Profile 1' }, function (data) {
$.each(data, function (k, v) {
alert(v.Attribute+' : '+v.Value);
});
});
});
Please help me here.

There are several things you can do.
Store value and attribute as arrays:
[{"Name":"P1","Description":"pd1","Value":["v1", "v2"],"Attribute":["a1", "a2"]}]
Or store them as a 'symbol'-separated string:
[{"Name":"P1","Description":"pd1","Value":"v1;v2"],"Attribute":"a1;a2"]}]
In order to use the first case, you'll have to try and figure out how to format the ProfileDetails in order to have javaScriptSerializer.Serialize parse it correctly. You will likely have to convert your data first in order for this to work (i.e. convert value and attribute to arrays).
For the second case to work you could modify your GetProfileDataService.GetList method so that values and attributes are merged to symbol-separated strings (something like this: GROUP BY to combine/concat a column)