当使用repl时,有时你想销毁一个变量,因为它以某种方式妨碍了你的编程(通常是命名空间冲突)。在clojure销毁变量
有没有办法在clojure中销毁一个变量?
user>(def x 1)
#'user/x
user>(aggressive-destroy! x)
nil
user>x
Unable to resolve symbol: x in this context
当使用repl时,有时你想销毁一个变量,因为它以某种方式妨碍了你的编程(通常是命名空间冲突)。在clojure销毁变量
有没有办法在clojure中销毁一个变量?
user>(def x 1)
#'user/x
user>(aggressive-destroy! x)
nil
user>x
Unable to resolve symbol: x in this context
user=> (def my-var "this is my-var!")
#'user/my-var
user=> (println my-var)
this is my-var!
nil
user=> (ns-unmap 'user 'my-var)
nil
user=> (println my-var)
CompilerException java.lang.RuntimeException: Unable to resolve symbol: my-var in this context, compiling:(NO_SOURCE_PATH:13)
user=>
http://stackoverflow.com/questions/5570826/how-can-i-undefine-a-function-in-clojure – wespiserA 2012-01-12 21:22:04