rust-functions 0.2.1

A collection of Rust utility functions (starting with format_number).
Documentation 
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# rust-functions


A collection of small, reusable Rust utility functions.  
The first release includes `format_number`, a helper for formatting numbers in a human-friendly way.

## Installation


Add this to your `Cargo.toml`:

```toml
[dependencies]
rust-functions = "0.2.1"
```

## Usage


The `format_number` function supports both `&str` and `usize` as the **group size** argument.

```rust
use rust_functions::number_formatting::format_number;

fn main() {
    // Default group size (3) when passing ""
    println!("{}", format_number("1234567", "")); 
    // → "001_234_567"

    // Explicit group size as string
    println!("{}", format_number("1234567", "4")); 
    // → "0123_4567"

    // Explicit group size as usize
    println!("{}", format_number("1234567", 4)); 
    // → "0123_4567"

    // Handles decimals
    println!("{}", format_number("1234.5678", 3)); 
    // → "001_234_decimal_point_567_800"

    // Handles negatives
    println!("{}", format_number("-1234", "")); 
    // → "negative_001_234"
}
```

## License


MIT