dstu

use array::with;

mod array {
    use std::marker::PhantomData;
    use std::ops::{Deref, DerefMut};

    #[derive(Clone,Copy)]
    pub struct InvariantLifetime<'id>(
        PhantomData<*mut &'id ()>);

dstu

#![feature(drain)]

use std::cmp::Ordering;

pub fn main() {
    let mut x_vec = vec![1, 2, 3, 4];
    let mut y_vec = vec![3, 4, 5];
    // Slightly contrived example: iterate through two sorted sequences in
    // tandem, merging them into a new sequence.
    let mut xs = x_vec.drain(0..);

dstu

use strict;
use warnings;
use Data::Dumper;

my $things = { foo => 'bar' };
foreach my $word (qw(foo baz bar quux)) {
  my $count = grep { defined } $things->{$word};
  print "$count\n";
}