使用try catch for map时如何获取当前迭代的值

Question

以下代码失败，因为 "b" 不是有效数字。但是如何捕获它并将日志打印为 "It is b which cause the error, please fix it"？困难在于如何获取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"])

使用try catch for map时如何获取当前迭代的值

how to get the value of the current iteration when using try catch for map

clojure