Detect String

[anirban]

In CLISP, how to detect whether an object is a string or not?

[Kompottkin]

You can use STRINGP.

Code: Select all

[1]> (stringp "abc")
T
[2]> (stringp 100)
NIL

In general, TYPECASE and CTYPECASE are often more useful.

Code: Select all

(typecase x
  (string
   (format t "~&X is a string."))
  (number
   (format t "~&X is a number."))
  (t
   (format t "~&X is... something.")))

[anirban]

Thanks everyone!