npm compat: bug running polars

[sigmaSd]

import pl from 'npm:nodejs-polars';
let df = pl.DataFrame({
  integer: [1, 2, 3, 4, 5],
  date: [
    new Date(2022, 1, 1, 0, 0),
    new Date(2022, 1, 2, 0, 0),
    new Date(2022, 1, 3, 0, 0),
    new Date(2022, 1, 4, 0, 0),
    new Date(2022, 1, 5, 0, 0),
  ],
  float: [4.0, 5.0, 6.0, 7.0, 8.0],
});
console.log(df) // error here

error

Error: not found: constructor
    at Object.getColumn (file:///home/mrcool/.cache/deno/npm/registry.npmjs.org/nodejs-polars/0.8.0/bin/dataframe.js:172:46)
    at Object.getOwnPropertyDescriptor (file:///home/mrcool/.cache/deno/npm/registry.npmjs.org/nodejs-polars/0.8.0/bin/dataframe.js:617:31)
    at getOwnPropertyDescriptor (<anonymous>)
    at getConstructorName (ext:deno_console/01_console.js:1205:24)
    at formatRaw (ext:deno_console/01_console.js:810:23)
    at formatValue (ext:deno_console/01_console.js:721:10)
    at Object.inspectArgs (ext:deno_console/01_console.js:3114:28)
    at <anonymous>:3:55 {
  code: "GenericFailure"
}

linux deno 1.35.0

[sigmaSd]

The workaround is to use console.log(df.toString());

This will skip deno log machinery for objects

[rgbkrk]

Would it be worth creating a deno package that builds on top of polars in rust directly? Now that #20337 is getting close, I'd love to make sure we can work with tabular data interactively.

[sigmaSd]

I personally don't see the benefit, there is a lot of work done in polar-js, and it would be a big duplication of effort for no obvious gain

The polars-js package does work on deno albeit this small issue , one can use the manpower instead to improve the quality if life of deno-polarjs relation, for example making it not use node child process exec somehow since its shells out to sh so you need to give it the permission to run it (though we already need --allow-ffi=pathToLib)

[rgbkrk]

Maybe it would be smart for us to add deno as a test target like in pola-rs/nodejs-polars#115 with a little deno script.

[rgbkrk]

This code runs for me in 1.37.0+

Could you verify too?

[sigmaSd]

Thanks it works indeed