Solution: Count words using two vectors

---

examples/vectors/count-words/src/main.rs

fn main() {
    let text = String::from("mouse cat cat oliphant");
    let parts = text.split_whitespace();

    let mut words: Vec<&str> = vec![];
    let mut count: Vec<i32> = vec![];

    for word in parts {
        let mut found = false;
        for ix in 0..words.len() {
            if words[ix] == word {
                count[ix] += 1;
                found = true;
                break;
            }
        }
        if !found {
            words.push(word);
            count.push(1);
        }
    }

    // report
    for ix in 0..words.len() {
        println!("{}: {}", words[ix], count[ix])
    }
}

mouse: 1
cat: 2
oliphant: 1