如何将 append 数据导入 JSON 文件 NodeJS

Question

I have a very large JSON file around 5 million objects

eg data.json

[
{id:1},
{id:2},
{id:3},
{id:4}
]

I need to append object into data.json file file

{id:5}

so it look like this

[
{id:1},
{id:2},
{id:3},
{id:4},
{id:5}
]

issue is I can't read that file every time because it take so long to read that file then append my object into file array object then re-write the whole file

Answer 1

If you want to append any object(data), simply go to that positions of an array and put that there. But first try to give name to that array in which you want to append, like below,

let array = [
    {id:1},
    {id:2},
    {id:3},
    {id:4}
]


 array[4] = {id:5}
 console.log(array)

you can check this on online js compiler like this one Js Compiler