iter-map-concat.rs

fn main () {
    use std::vec_ng::Vec;

    let mut a_vec: Vec<int> = Vec::new();
    a_vec.push(0);
    a_vec.push(1);
    a_vec.push(2);

    let a_str: ~str;

    a_str = a_vec.map(|n| -> ~str {
        n.to_str()
    }).concat();

    println!("{}", a_str);

    let b_str: ~str;

    b_str = a_vec.iter().map(|n| -> ~str {
        n.to_str()
    }).concat();

    println!("{}", b_str);
}

/*
[vm:test]$ rustc src/iter.rs --out-dir bin

src/iter.rs:11:13: 13:7 warning: use of deprecated item: Use `xs.iter().map(closure)` instead., #[warn(deprecated)] on by default
src/iter.rs:11     a_str = a_vec.map(|n| -> ~str {
src/iter.rs:12         n.to_str()
src/iter.rs:13     }).concat();

src/iter.rs:19:13: 21:16 error: type `std::iter::Map<,&int,~str,std::vec::Items<,int>>` does not implement any method in scope named `concat`
src/iter.rs:19     b_str = a_vec.iter().map(|n| -> ~str {
src/iter.rs:20         n.to_str()
src/iter.rs:21     }).concat();
*/