How to save data to json file where each data should have a unique id ?

Question

I have a code that sends user entered name to a json file.
I want to save that name with a I'd.
ex:
user entered name -hello
I want to save this in json file along with I'd
I'd:"0",
name:"hello" etc
next time I'd must be 1and continues.
I hope you are understood.
Please help me to make that possible.
Please give code of it.

Answer 1

A basic can be to retrieve the Json data from the file on every new insert and find out its last saved id and increment that by 1 then use the resulting number as the Id for the row to be inserted next.....