Extract data from javascript - json

have a java script element , which when printed, gives [object Object].
console.log(data)
When i tried to JSON.Stringify(data) -it gives a json value:
{"key":"value"}
How to extract the value from the above object ?

JSON.stringify creates a JSON string representation of that JS object. If you want to use it as a JSON, you'd have to parse it again:
let data = '{"key": "value"}';
let dataJSON = JSON.parse(data);
console.log(dataJSON.key);
Outputs: value

Related

Obtain value in json response

How do i write an expression to obtain the value "lastUpdated" in the below json response data
{"resourceType":"Parameters","parameter":[{"name":"medication","resource":{"resourceType":"Bundle","id":"956ffe6a-08ed-4cb6-82ca-41065a4a9923","meta":{"lastUpdated":"2020-08-24T19:09:18.5649325+00:00",
I have tried this but it does not work:
regex("\"lastUpdated\": \"(.*?)\"").saveAs("lastUpdated")
this also does not work:
jsonPath("$..[?(#.use==\"lastUpdated\")].value").saveAs("lastUpdated"))
Your input is a little cut off but here is what I've got:
myJSONString = '{"resourceType":"Parameters","parameter":[{"name":"medication","resource":{"resourceType":"Bundle","id":"956ffe6a-08ed-4cb6-82ca-41065a4a9923","meta":{"lastUpdated":"2020-08-24T19:09:18.5649325+00:00"}}}]}'
myJSONObject = JSON.parse(myJSONString)
myLastUpdated = myJSONObject.parameter[0].resource.meta.lastUpdated
console.log(myLastUpdated)
Basically you convert it from a json object into a javascript object. Then you can just traverse down the tree to your intended target.

Converting xml text from webpage to json

I'm trying to convert xml on a webpage to json.
I used axios to grab the information from the URL and then used npm xml.js to try to convert the data to json.
let axios = require("axios");
let convert = require("xml-js");
let mtaURL = "http://advisory.mtanyct.info/eedevwebsvc/allequipments.aspx";
axios.get(mtaURL)
.then(response => {
let results = convert.xml2json(response, {compact: false, spaces: 4})
console.log(results);
})
It came back with the following:
Error: Text data outside of root node.
Line: 0
Column: 59
Char: x
You're trying to parse the Axios response object as XML.
You need to read the body of the response and treat that as XML.
response.data

How to extract information from angular output

If I log the full data from an Angular client I get
object { type: "message", target: {_}, errorCode: undefiend,
errorMessage: undefined, data: "{\"data\":[\"124",\"611\"]}",
lastEventId: ""}
I want to grab the {\"data\":[\"124",\"611\"]} part to send it as json to a client. Using JSON.parse(data.data) though gives me
data: "{\"data\":[\"124",\"611\"]}", lastEventId: ""}
Is it possible to just grab the "{\"data\":[\"124",\"611\"]}" since otherwise the client has problems with the deserialization.
Let's say you have your initial string in myobject_string.
Then, you extract the JSON to a Javascript object with: const myobject = JSON.parse(myobject_string).
Then, the data you are looking for is in myobject.data.
Look here for more example code on JSON.parse.

parse json response to typescript class

i know there are multiple similar topics, however trying their solutions doesn't give me expected result.
Input json string
data:"{"message": "{\"type\":\"CONTROL\",\"command\":\"REQUEST_STATUS_ALL\"}"}"
object declaration/parse:
const msg: Message = <Message>JSON.parse(data.data);
output:
{message: "{"type":"CONTROL","command":"REQUEST_STATUS_ALL"}"}
-values are not properly assigned, but instead in a text form.
the same object looks like this if it's initialized manually(in TS):
MessageĀ {type: "CONTROL", status: undefined, command: "REQUEST_STATUS_ALL", body: undefined}
What is the correct way to parse that json string into the Message object?
Thank you!
It seems the value for message was improperly encoded as a string. Calling JSON.parse a second time on the message property will get the result you want, though you might want to fix the underlying cause of the improperly encoded data instead.
parseMessage(data: string) {
const msgTemp = JSON.parse(data);
msgTemp.message = JSON.parse(msgTemp.message);
return <Message>msgTemp;
}
const msg = parseMessage(data.data);

Convert JSON object to array?

I have this on my console on firebug,
[Object { fa_id="1167535", f_id="1000", loc_type="6", more...}, Object { fa_id="1167535", f_id="1000", loc_type="6", more...}]
it is data from the server side. Now, how would I convert this into array such that this data can be used on another file. I tried JSON.parse and jQuery.parseJSON but both did not work.
That isn't JSON it's a Javascript array of objects, not a string. My guess is that you've received this from a jQuery ajax call and you had the dataType : 'json' set so that jQuery has automatically parsed the JSON into this array.
To send it to a PHP script you can convert it back to JSON using:
var myString = JSON.stringify(data);
and then fire off an ajax call to the PHP script with that as the POST data:
var myString = JSON.stringify(data);
$.post('page.php', { data : myString }, function(){
console.log( "sent" );
});
In PHP you can decode it using:
$data = json_decode($_POST['data']); // <-- or whatever your post variable is named
foreach($data as $obj)
{
echo $obj->fa_id;
}
if you want to get an php array use this
http://php.net/manual/en/function.json-decode.php
The string you provided is not valid JSON.
[Object { fa_id="1167535", f_id="1000", loc_type="6", more...},
Object { fa_id="1167535", f_id="1000", loc_type="6", more...}]
In particular, the "Object" and "more..." strings cannot be interpreted by a JSON parser.
Assuming the object you are inspecting is a variable named foo:
console.log(JSON.stringify(foo));
Should print a valid JSON representation of your object to the Javascript console.