clojure - 如何从向量中获取奇数索引值？

Question

假设有一个名称向量:

(def noms ["Tim" "Joseph" "Steven" "Michael"])

如何从 odd-index 获取名称？

更新:实际上，我试图在 Clojure 中重写这段 Rust 代码:

fn main() {
    let nums = [1, 2];
    let noms = ["Tim", "Eston", "Aaron", "Ben"];

    let mut odds = nums.iter().map(|&x| x * 2 - 1);

    for num in odds {
        spawn(proc() {
            println!("{:s} says hello from a lightweight thread!", noms[num]);
        });
    }
}

有一个惯用的方法吗？

编辑:下面是与上述 Rust 代码几乎相同的 Clojure 代码:

(def  noms ["Tim", "Eston", "Aaron", "Ben"])
(doseq [i (take-nth 2 (rest noms))]
    (println i "says hello from a lightweight thread!"))

新问题是:如何编写“轻量级”线程(或 Clojure 术语中的等效内容)？

Answer 1

您可以使用take-nth

(take-nth 2 (rest ["Tim" "Joseph" "Steven" "Michael"]))