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# Description
This PR introduces `polars struct-encode-json`. This exposes the ability
to encode struct columns as json strings. This is useful when converting
things to formats like CSV that do not support complex types.
```nushell
> ❯ : [[id person]; [1 {name: "Bob", age: 36}] [2 {name: "Betty", age: 63}]]
| polars into-df -s {id: i64, person: {name: str, age: u8}}
| polars select id (polars col person | polars struct-json-encode | polars as encoded)
| polars collect
╭───┬────┬───────────────────────────╮
│ # │ id │ encoded │
├───┼────┼───────────────────────────┤
│ 0 │ 1 │ {"age":36,"name":"Bob"} │
│ 1 │ 2 │ {"age":63,"name":"Betty"} │
╰───┴────┴───────────────────────────╯
```
# User-Facing Changes
* Added `polars struct-encode-json`, providing the ability to encode
structs as json
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| .. | ||
| cache | ||
| cloud | ||
| dataframe | ||
| lib.rs | ||
| main.rs | ||