Support for JSONL

[aravinds03]

Hi, Is there any support for jsonl format ? If yes, can you please document it with example code?

[vidhanio]

Does StreamDeserializer not work for this?

[clotodex]

For me it worked. I used it like this

let loaded: Vec<YourType> =
     serde_json::Deserializer::from_str(&std::fs::read_to_string(file)?)
                .into_iter::<YourType>()
                .collect::<std::result::Result<Vec<_>, _>>()?;

[aravinds03]

How about serializing Vec<T> into JSONL ?

[clotodex]

This was my naive approach (not working with gigantic data amounts though)

std::fs::write(
    file,
    your_vec
        .into_iter()
        .map(|e| serde_json::to_string(&e))
        .collect::<std::result::Result<Vec<_>, _>>()?
        .join("\n"),
)?;

[vidhanio]

This was my naive approach (not working with gigantic data amounts though)

std::fs::write(
    file,
    your_vec
        .into_iter()
        .map(|e| serde_json::to_string(&e))
        .collect::<std::result::Result<Vec<_>, _>>()?
        .join("\n"),
)?;

let file = File::options()
    .write(true)
    .create(true)
    .open("your_file.json")?;

your_vec.into_iter().try_fold(file, |mut file, item| {
    serde_json::to_writer(&mut file, &item)?;
    writeln!(file)?;
    Ok(file)
})?

// or

for item in your_vec {
    serde_json::to_writer(&mut file, &item)?;
    writeln!(file)?;
}