Function extension
Source pub fn extension(path: &str) -> Result<Option<String>>
Expand description
Get the file extension
§Examples
use ruchy::stdlib::path;
let result = path::extension("/home/user/file.txt").unwrap();
assert_eq!(result, Some("txt".to_string()));
§Errors
Returns error if path conversion fails
§Complexity
Complexity: 2 (within Toyota Way limits ≤10)