Insertion Sort in Rust (original) (raw)

Published on 03 October 2020 (Updated: 08 May 2023)

Insertion Sort in Rust

Welcome to the Insertion Sort in Rust page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

use std::env::args;
use std::process::exit;
use std::str::FromStr;

fn usage() -> ! {
    println!("Usage: please provide a list of at least two integers to sort in the format \"1, 2, 3, 4, 5\"");
    exit(0);
}

fn parse_int<T: FromStr>(s: &str) -> Result<T, <T as FromStr>::Err> {
    s.trim().parse::<T>()
}

fn parse_int_list<T: FromStr>(s: &str) -> Result<Vec<T>, <T as FromStr>::Err> {
    s.split(',')
        .map(parse_int)
        .collect::<Result<Vec<T>, <T as FromStr>::Err>>()
}

fn insertion_sort<T: PartialOrd>(arr: &mut Vec<T>) {
    for i in 0..arr.len() {
        for j in (0..i).rev() {
            if arr[j] >= arr[j+1] {
                arr.swap(j, j+1);
            } else {
                break;
            }
        }
    }
}

fn main() {
    let mut args = args().skip(1);

    // Convert 1st command-line argument to list of integers
    let mut arr: Vec<i32> = args
        .next()
        .and_then(|s| parse_int_list(&s).ok())
        .unwrap_or_else(|| usage());

    // Exit if list too small
    if arr.len() < 2 {
        usage();
    }

    insertion_sort(&mut arr);
    println!("{arr:?}");
}

Insertion Sort in Rust was written by:

Andrew Johnson
rzuckerm

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

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How to Run the Solution

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