Ben Chuanlong Du's Blog

It is never too late to learn.

Filter a Polars DataFrame in Rust

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Tips and Traps

  1. LazyFrame.filter filters rows using an Expr while DataFrame.filter filters rows using a mask of the type ChunkedArray<BooleanType>.

Filter a Polars LazyFrame in Rust

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Tips and Traps

  1. LazyFrame.filter filters rows using an Expr while DataFrame.filter filters rows using a mask of the type ChunkedArray<BooleanType>.

Hands on the Rust Crate Parquet

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Comments

  1. Notice that a cell in a Parquet table has a type of Field which is an enum of types.

Polars Series in Rust

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!