Can JSON be just a list?

Is just a list valid JSON?

Both forms are valid. However, for an API, I would recommend the second form. The reason is that it gives you a path for expansion of your API.

Can JSON root be a list?

5 Answers. Yes, an array is legal as top-level JSON-text. There are three standard documents defining JSON: RFC 4627, RFC 7159 (which obsoletes RFC 4627), and ECMA-404. They differ in which top-level elements they allow, but all allow an object or an array as the top-level element.

Is an empty list valid JSON?

[] is a valid JSON which is an empty array. … Your JSON may be considered valid by browser JSON parsers, but it is a single string, while you try to deserialize it to an array of objects.

Can JSON have only values?

As for new JSON RFC, json, containing only single value is pretty valid. A JSON text is a serialized value. Note that certain previous specifications of JSON constrained a JSON text to be an object or an array.

Is JSON a list of dictionaries?

JSON, or JavaScript Object Notation, is a broader format used to encompass dictionary and list structures as shown in the image below. JSON: List and Dictionary Structure, Image by Author. The technical documentation says a JSON object is built on two structures: a list of key-value pairs and an ordered list of values.

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What does a JSON file look like?

A JSON object is a keyvalue data format that is typically rendered in curly braces. … Key-value pairs have a colon between them as in “key” : “value” . Each key-value pair is separated by a comma, so the middle of a JSON looks like this: “key” : “value”, “key” : “value”, “key”: “value” .

How does a JSON array look like?

A JSON array contains zero, one, or more ordered elements, separated by a comma. The JSON array is surrounded by square brackets [ ] . A JSON array is zero terminated, the first index of the array is zero (0). Therefore, the last index of the array is length – 1.

Can a JSON file be empty?

As an empty string is not valid JSON it would be incorrect for JSON.

What is proper JSON format?

JSON Syntax Rules

Data is in name/value pairs. Data is separated by commas. Curly braces hold objects. Square brackets hold arrays.

What makes a JSON file valid?

Proper JSON Format

Data is in name/value pairs. … A member is represented by a key-value pair, contained in double quotes. Each member should have a unique key within an object structure. The value of a member must be contained in double quotes, if it’s a string.

What does a JSON string look like?

A JSON string contains either an array of values, or an object (an associative array of name/value pairs). An array is surrounded by square brackets, [ and ] , and contains a comma-separated list of values. An object is surrounded by curly brackets, { and } , and contains a comma-separated list of name/value pairs.

How do I view a JSON file?

Steps to open JSON files on Web browser (Chrome, Mozilla)

  1. Open the Web store on your web browser using the apps option menu or directly using this link.
  2. Here, type JSON View in search bar under the Extensions category.
  3. You will get the various extensions similar to JSON View to open the JSON format files.
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How do I read JSONArray?

JSONArray jsonArray = (JSONArray) jsonObject. get(“contact”); The iterator() method of the JSONArray class returns an Iterator object using which you can iterate the contents of the current array.