如何在 0.9 中反转字符串? [英] How do I reverse a string in 0.9?

问题描述

如何在 Rust 0.9 中反转字符串?

How do I reverse a string in Rust 0.9?

根据 rosettacode.org 这在 0.8 中有效:

According to rosettacode.org this worked in 0.8:

let reversed:~str = "一二三四五六七八九十".rev_iter().collect(); 

...但我无法让迭代器在 0.9 中处理字符串.

... but I can't get iterators working on strings in 0.9.

也尝试过 std::str::StrSlice::bytes_rev 但我还没有想出一种干净的方法来将结果转换回字符串而不会导致编译器窒息.

Also tried std::str::StrSlice::bytes_rev but I haven't figured out a clean way to convert the result back into a string without the compiler choking.

推荐答案

首先对字节进行迭代，逆向会破坏多字节字符(你想要对字符进行迭代)

First of all iteration over bytes and reversing will break multibyte characters (you want iteration over chars)

let s = ~"abc";
let s2: ~str = s.chars_rev().collect();
println!("{:?}", s2);

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