Tips for retrieving a unique key from a JSON object response

Question

Tips for retrieving a unique key from a JSON object response

Display the object_id for each object(response) in the provided dataset.

This is the response obtained from an API. Any suggestions or solutions are greatly appreciated.

response:{"object_id":"a9951ef0","datetime":"2019-03-20T04:59:23.001Z","ignition_status":"ON"}

response:{"object_id":"8b1546924063","datetime":"2019-03-20T04:59:23.001Z","ignition_status":"OFF"}

response:{"object_id":"9b9d","datetime":"2019-03-20T04:59:23.001Z","ignition_status":"ONLINE"}

Desired output :

object_id = a9951ef0
object_id = 8b1546924063
object_id = 9b9d

javascript json

Answer 1

Answer №1

If you have three responses with a common key and need to extract the value of that key, consider using streams.

Start by converting the JSON responses into a List of objects:

[
  "response1",
  "response2",
  "response3"
]

arrayList = new Gson().fromJson(<above json>, ArrayList.class)

Then, retrieve the desired values using streams:

arrayList.stream.map(<arraylistType> :: <keyName>).collect(Collectors.toList());

Answer 2

If you have three responses with a common key and need to extract the value of that key, consider using streams.

Start by converting the JSON responses into a List of objects:

[
  "response1",
  "response2",
  "response3"
]

arrayList = new Gson().fromJson(<above json>, ArrayList.class)

Then, retrieve the desired values using streams:

arrayList.stream.map(<arraylistType> :: <keyName>).collect(Collectors.toList());

Answer 3

Answer №2

Your API is sending back JSON data, which is in the form of a string. In order to work with this data, you will need to "convert" it into a JavaScript Object using the parse method. Once parsed, you can easily access the value associated with a specific key.

const parsedResponse = JSON.parse(response);
console.log(parsedResponse.object_id);

Answer 4

Your API is sending back JSON data, which is in the form of a string. In order to work with this data, you will need to "convert" it into a JavaScript Object using the parse method. Once parsed, you can easily access the value associated with a specific key.

const parsedResponse = JSON.parse(response);
console.log(parsedResponse.object_id);

Answer 5

Answer №3

To tackle this issue, consider the following approach outlined in pseudo code form (please note that it may require some adjustment to fit your specific scenario).

# Begin by obtaining the response from the API and converting it into an array, using newline characters as separators (feel free to use a different separator if necessary).
responses_in_array = real_response.split("\n");

# Iterate through each response within the array.
foreach(single_response in responses_in_array) {

    # Prior to converting responses into JavaScript objects, make sure to clean them up appropriately.
    clean_response = single_response.replace("response:", "");
    real_object = JSON.Parse(clean_response);

    // Perform any desired actions. Should you need to access object_id, simply refer to
    // real_object.object_id.
    //
    // Additionally, consider checking for empty lines before cleaning or processing them.

}

Once you have successfully implemented the fundamental logic for parsing the message, explore alternative methods or utilize built-in functions to enhance your solution further.

Answer 6

To tackle this issue, consider the following approach outlined in pseudo code form (please note that it may require some adjustment to fit your specific scenario).

# Begin by obtaining the response from the API and converting it into an array, using newline characters as separators (feel free to use a different separator if necessary).
responses_in_array = real_response.split("\n");

# Iterate through each response within the array.
foreach(single_response in responses_in_array) {

    # Prior to converting responses into JavaScript objects, make sure to clean them up appropriately.
    clean_response = single_response.replace("response:", "");
    real_object = JSON.Parse(clean_response);

    // Perform any desired actions. Should you need to access object_id, simply refer to
    // real_object.object_id.
    //
    // Additionally, consider checking for empty lines before cleaning or processing them.

}

Once you have successfully implemented the fundamental logic for parsing the message, explore alternative methods or utilize built-in functions to enhance your solution further.

Answer 7

Answer №4

Resolved: I managed to fix the issue using the method outlined below, and now everything is running smoothly.

     <script type="text/javascript">
       document.getElementById('test').onclick = function() {
         xhr = new XMLHttpRequest();
         xhr.open("GET", "filename.json or api url", true);
         //xhr.open("GET", "compose.json", true);
         xhr.onprogress = function(e) {
           var data = e.currentTarget.responseText;
           console.clear();
           var formattedData = JSON.parse(JSON.stringify(data))
                                .replace(/(\r\n|\n|\r)/gm, "#")
                                .replace(/##response:/g, ",")
                                .replace(/response:/g, "")
                                .replace(/##/g, "")
                                .replace(/\\n/g, "\\n")  
                                .replace(/\\'/g, "\\'")
                                .replace(/\\"/g, '\\"')
                                .replace(/\\&/g, "\\&")
                                .replace(/\\r/g, "\\r")
                                .replace(/\\t/g, "\\t")
                                .replace(/\\b/g, "\\b")
                                .replace(/\\f/g, "\\f");
            // remove non-printable and other non-valid JSON characters
            formattedData = "["+formattedData.replace(/[\u0000-\u0019]+/g,"")+"]"; 
            var finalData = JSON.parse(formattedData);

            console.log(finalData);              
         }
         xhr.onreadystatechange = function() {
           if (xhr.readyState == 4) {
             console.log("Completed = " + xhr.responseText);
           }
         }
         xhr.send();
       };
     </script>

Answer 8

Resolved: I managed to fix the issue using the method outlined below, and now everything is running smoothly.

     <script type="text/javascript">
       document.getElementById('test').onclick = function() {
         xhr = new XMLHttpRequest();
         xhr.open("GET", "filename.json or api url", true);
         //xhr.open("GET", "compose.json", true);
         xhr.onprogress = function(e) {
           var data = e.currentTarget.responseText;
           console.clear();
           var formattedData = JSON.parse(JSON.stringify(data))
                                .replace(/(\r\n|\n|\r)/gm, "#")
                                .replace(/##response:/g, ",")
                                .replace(/response:/g, "")
                                .replace(/##/g, "")
                                .replace(/\\n/g, "\\n")  
                                .replace(/\\'/g, "\\'")
                                .replace(/\\"/g, '\\"')
                                .replace(/\\&/g, "\\&")
                                .replace(/\\r/g, "\\r")
                                .replace(/\\t/g, "\\t")
                                .replace(/\\b/g, "\\b")
                                .replace(/\\f/g, "\\f");
            // remove non-printable and other non-valid JSON characters
            formattedData = "["+formattedData.replace(/[\u0000-\u0019]+/g,"")+"]"; 
            var finalData = JSON.parse(formattedData);

            console.log(finalData);              
         }
         xhr.onreadystatechange = function() {
           if (xhr.readyState == 4) {
             console.log("Completed = " + xhr.responseText);
           }
         }
         xhr.send();
       };
     </script>

Tips for retrieving a unique key from a JSON object response

Answer №1

Answer №2

Answer №3

Answer №4

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