You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: arrays.rs
    path of file: ./repos/picky/server/prototypes/rust/array/src
    
    the code of the file until where you have to start completion: use std::fmt;

use std::collections::HashMap;
use std::hash::Hash;

pub struct Array {
    data: Vec<u16>,
}

impl Array {
    pub fn new() -> Array {
        Array {
            data: Vec::new(),
        }
    }
    
    pub fn new_with_init(item: u16) -> Array {
        Array {
            data: vec![item],
        }
    }

    pub fn append(&mut self, item: u16) -> u16 {
        self.data.push(item);
        item
    }
    
    pub fn shift(&mut self) -> u16 {
        let item = self.data.remove(0);
        println!("shift: {:?}", item); // Ummm... Why does it only work wh
    
    fn intersect(&self, other: &Vec<T>) -> Vec<T> {
        let mut result: Vec<T> = vec![];
        let mut map = HashMap::<T,()>::new();
        
        // Use the shorter Vector for the Hash.
        let longer;
        let shorter;
        
        if self.len() > other.len() {
            longer  = self;
            shorter = other;
        } else {
            longer  = other;
            shorter = self;
        }
        
        // Insert all items in the shorter Vector
        // into the Hash.
        for &item in shorter.iter() {
            map.insert(item, ());
        }
        
        // Iterate over the longer Vector to
        // fill result vector.
        for &item in longer.iter() {
            if map.contains_key(&item) {
                result.push(item);
            }
        }
        
        result
    }