Translations of Clojure Errors to English

Clojure is notorious for producing near-incomprehensible error messages.

• Don't know how to create ISeq from whatever:

  You are trying to perform a first or rest operation on something that is not a cons.

  user=> (first 'foo)
  Execution error (IllegalArgumentException) at user/eval217 (REPL:1).
  Don't know how to create ISeq from: clojure.lang.Symbol
  
  user=> (first 3)
  Execution error (IllegalArgumentException) at user/eval1 (REPL:1).
  Don't know how to create ISeq from: java.lang.Long
  
  user=> (first 3.14)
  Execution error (IllegalArgumentException) at user/eval3 (REPL:1).
  Don't know how to create ISeq from: java.lang.Double
  
  user=> (rest 'foo)
  Execution error (IllegalArgumentException) at user/eval219 (REPL:1).
  Don't know how to create ISeq from: clojure.lang.Symbol
  

• class clojure.lang.whatever cannot be cast to class clojure.lang.IFn ...

  You have too many parentheses: (list ((+ 2 3)) (* 3 7)) instead of (list (+ 2 3) (* 3 7)) .