Guide to iterating through a JSON object

Question

Guide to iterating through a JSON object

Initially, I expected a simple question but it's proving to be more challenging than I thought. To provide some context, there is a JSON string returned from the server located within data.occupation.

{"occupation": "Boxer", "id": 2},{"occupation": "Helper", "id": 3}

My goal is to obtain an array of ids: [2, 3]

Despite my attempts to iterate through this data set, I keep encountering type errors and undefined values.

Can JQuery handle this task or should I consider parsing the backend to send an array of ids to JQuery?

javascript json

Answer 1

Answer №1

jQuery is not necessary to achieve this task.

To begin, if you are dealing with a string, it should be parsed first.

let jsonData = JSON.parse(your_string)

After parsing, iterate through all the JSON objects and store them in an array.

let ids = []
for (let i = 0; i < jsonData.length; i++) {
    ids.push(jsonData[i].id)
}

Note: if the data does not parse correctly, ensure that the JSON objects are within an array. You can do so by using the following method:

let jsonData = JSON.parse("[" + your_string + "]")

This adjustment will organize the data into an array structure.

Answer 2

jQuery is not necessary to achieve this task.

To begin, if you are dealing with a string, it should be parsed first.

let jsonData = JSON.parse(your_string)

After parsing, iterate through all the JSON objects and store them in an array.

let ids = []
for (let i = 0; i < jsonData.length; i++) {
    ids.push(jsonData[i].id)
}

Note: if the data does not parse correctly, ensure that the JSON objects are within an array. You can do so by using the following method:

let jsonData = JSON.parse("[" + your_string + "]")

This adjustment will organize the data into an array structure.

Guide to iterating through a JSON object

Answer №1

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