creating a JSON object

Exploring JSON for the first time and I have a couple of questions:

  1. Is it possible to create a JSON object using the 'data-id' attribute and have it contain a single array of numbers?
  2. Even though I have the code to do this, I am facing difficulties in constructing the JSON object. Here's the code snippet:

Here's the code snippet:

var displayed = {};
$('table#livefeed tr').each(function (i) {
    var peopleID = $(this).attr("data-id");
    //console.log("id: " + peopleID);
    if(peopleID!="undefined") displayed += peopleID;
});
console.log(displayed);

However, this implementation doesn't work as intended, resulting in a concatenation of objects as a string.

javascriptjson

Answer №1

An instance of JSON may consist of an array of numeric values.

Consider implementing the following:

var shownValues = [];
$('table#livefeed tr').each(function (i) {
    var personID = $(this).attr("data-id");
    if(personID!="undefined") 
        shownValues.push(personID);
});
console.log(shownValues);

In order to convert it to JSON format,

JSON.stringify(shownValues);

Answer №2

To begin, construct an object and then utilize the JSON.stringify(object); method to convert it into a string. However, an error may arise. If you are verifying the existence of peopleID, you must use typeof as an undefined attribute will not have the value 'undefined':

var captured = [];
$('table#livefeed tr').each(function (i) {
    var peopleID = $(this).attr("data-id");
    //console.log("id: " + peopleID);
    if(typeof(peopleID)!="undefined") captured.push(peopleID);
});
console.log(captured);
var jsonRepresentation = JSON.stringify(captured);
console.log("JSON: " + jsonRepresentation);

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