Path and Filesystem Models

Path File Parts

Read Name and Extension

Path can inspect filename-shaped text without opening or reading from the filesystem.

Program

Play the program to choose a path string and inspect its final name and extension.

path_file_parts.rs 
use std::path::Path;

fn main() {
    let raw = ;
    let path = Path::new(raw);
    let file = path.file_name().and_then(|name| name.to_str()).unwrap_or("none");
    let ext = path.extension().and_then(|name| name.to_str()).unwrap_or("none");
    println!("{file}:{ext}");
}

use std::path::Path;

fn main() {
    let raw = ;
    let path = Path::new(raw);
    let file = path.file_name().and_then(|name| name.to_str()).unwrap_or("none");
    let ext = path.extension().and_then(|name| name.to_str()).unwrap_or("none");
    println!("{file}:{ext}");
}

use std::path::Path;

fn main() {
    let raw = ;
    let path = Path::new(raw);
    let file = path.file_name().and_then(|name| name.to_str()).unwrap_or("none");
    let ext = path.extension().and_then(|name| name.to_str()).unwrap_or("none");
    println!("{file}:{ext}");
}
Path `Path::new` treats a string as path-shaped data without touching the filesystem.
file_name `file_name` returns the last component when one is present.
extension `extension` returns the text after the last dot in the filename.