### Sort by Key Extraction Function

Source: https://github.com/jakubvaltar/radsort/blob/main/README.md

Shows how to sort a slice of custom types (strings in this case) by extracting a sortable key using a closure. The example sorts strings by their length.

```rust
let mut friends = ["Punchy", "Isabelle", "Sly", "Puddles", "Gladys"];

// sort by the length of the string in bytes
radsort::sort_by_key(&mut friends, |s| s.len());

assert_eq!(friends, ["Sly", "Punchy", "Gladys", "Puddles", "Isabelle"]);
```

--------------------------------

### radsort::unopt::sort Functionality

Source: https://github.com/jakubvaltar/radsort/wiki/Benchmarks

Demonstrates the usage and behavior of the `radsort::unopt::sort` function, which sorts slices by all bytes of the key. This version is considered a worst-case scenario compared to the optimized `radsort::sort`.

```rust
use radsort::unopt;

fn main() {
    let mut data = vec![5u8, 2, 8, 1, 9];
    unopt::sort(&mut data);
    println!("{:?}", data);
}
```

--------------------------------

### Sort Scalar Types Directly

Source: https://github.com/jakubvaltar/radsort/blob/main/README.md

Demonstrates sorting a slice of integers directly using the `radsort::sort` function. This is the most straightforward way to sort primitive numeric types.

```rust
let mut data = [2i32, -1, 1, 0, -2];

radsort::sort(&mut data);

assert_eq!(data, [-2, -1, 0, 1, 2]);
```

--------------------------------

### Sort by Multiple Keys (Tuple)

Source: https://github.com/jakubvaltar/radsort/blob/main/README.md

Illustrates sorting a slice of custom structs based on multiple fields. The sorting order is determined by the tuple of fields provided to `sort_by_key`, with the first element being the primary sort key.

```rust
struct Height { feet: u8, inches: u8, }

let mut heights = [
    Height { feet: 6, inches: 1 },
    Height { feet: 5, inches: 9 },
    Height { feet: 6, inches: 0 },
];

// sort by feet, if feet are equal, sort by inches
radsort::sort_by_key(&mut heights, |h| (h.feet, h.inches));

assert_eq!(heights, [
    Height { feet: 5, inches: 9 },
    Height { feet: 6, inches: 0 },
    Height { feet: 6, inches: 1 },
]);
```

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