如何在使用try catch for map时获取当前迭代的值

Question

以下代码失败，因为“b”不是有效数字。但是如何抓住它并将日志打印为“导致错误的是b，请修复它”？困难在于如何获得导致失败的当前迭代的值。如何使用try / catch来做到这一点？

=> (map #(Float/parseFloat %)  ["1" "b"])
NumberFormatException For input string: "b"  sun.misc.FloatingDecimal.readJavaFormatString (FloatingDecimal.java:2043)

Answer 1

(defn parse-incredulously [x]
  (try (Float/parseFloat x)
       (catch Exception e
         (println (format "It is %s which cause the error, please fix it" x)))))

(map parse-incredulously ["1" "b"])