count character occurrence in string rust

Himanshu Jangid answered on April 14, 2023 Popularity 6/10 Helpfulness 3/10

answer count character occurrence in string rust

count character occurrence in string rust

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use std::collections::HashMap;

fn main() {
    let input = String::from("aaaabbbbcccddee");

    let mut map: HashMap<char, u16> = HashMap::new();

    for ch in input.chars() {
        println!("{}", &ch);
        let count = map.get(&ch);

        if let Some(c) = count {
            map.insert(ch.to_owned(), c + 1);
        } else {
            map.insert(ch.to_owned(), 1);
        }
    }
    // this is the final map, with the the character occurance count
    println!("{:?}", map);
}

Popularity 6/10 Helpfulness 3/10 Language rust

Source: Grepper

Tags: character count rust string

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Contributed on Apr 14 2023

Himanshu Jangid

0 Answers Avg Quality 2/10

count character occurrence in string rust

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