hashmap-count 0.1.0

command-line tool that counts the number of occurrences of each integer in a comma-separated list of integers
Documentation 
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use std::collections::HashMap;

pub fn logic(numbers: Vec<i32>) -> Vec<(i32, u32)> {
    let mut frequencies = HashMap::new();

    for num in numbers {
        let frequency = frequencies.entry(num).or_insert(0);
        *frequency += 1;
    }

    let mut result = Vec::new();

    for (num, frequency) in frequencies {
        result.push((num, frequency));
    }

    result
}