I want convert json object into json array using js or groovy

Question

sample input- '{"name":"John", "age":30, "car":null}'

expected output- ['{"name":"John", "age":30, "car":null}']

Answer 1

want when ever we got json if it starts with "{" then wanted to push "[" and "]" at the start and end of json.

If that is all you need then you could do this:

String input =  '{"name":"John", "age":30, "car":null}'

// ...

if(input.startsWith('{')) {
    input = "[${input}]"
}