Function group

src/vectors.rs:246–263

Counts and compresses consecutive elements that are equal. # Example ``` use rustml::vectors::*; let a = vec![1, 1, 2, 3, 3, 3, 3, 5, 5, 3]; assert_eq!( group(&a), vec![(1, 2), (2, 1), (3, 4), (5, 2), (3, 1)] ); ```

(v: &Vec<T>)

/// );
/// ```
pub fn group<T: PartialEq + Clone>(v: &Vec<T>) -> Vec<(T, usize)> {

    let mut r: Vec<(T, usize)> = Vec::new();
    for val in v {
        if r.len() == 0 {
            r.push((val.clone(), 1));
        } else {
            let mut x = r.pop().unwrap();
            if x.0 != *val {
                r.push(x);
                x = (val.clone(), 0);
            }
            x.1 += 1;
            r.push(x);
        }
    }
    r
}

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