How to get a Vec of Structs out of dataframe?

Question

Suppose I've got

use polars::prelude::*;
pub struct Person {
    id: u32,
    name: String,
    age: u32,
}


let df = df!(
    "id" => &[1,2,3],
    "name" => &["John", "Jane", "Bobby"],
    "age" => &[32, 28, 45]
).unwrap();

How can I get a Vec of structs out in place of this fixed definition of rows?

let rows = vec![
    Person { id: 1, name: "John".to_string(), age: 32 },
    Person { id: 2, name: "Jane".to_string(), age: 28 },
    Person { id: 3, name: "Bobby".to_string(), age: 45 },
];

In case anyone's wondering why I ask, I'm trying to use leptos-struct-table with polars built in wasm.

Answer 1

I turned the df into its constituent Series, zipped them together then mapped them into the Person

let rows:Vec<Person>=
    df.column("id").unwrap().i32().unwrap().into_iter()
    .zip(df.column("name").unwrap().str().unwrap().into_iter())
    .zip(df.column("age").unwrap().i32().unwrap().into_iter())
    .map(|((id, name), age)| {
        Person {
            id:id.unwrap(), 
            name:name.unwrap().to_string(), 
            age:age.unwrap()
        }
    })
    .collect();