delete-from-eset

Purpose
Delete item from eset if it is present using eq as the comparison function.

Package   :gbbopen-tools

Module   :gbbopen-tools

Arguments and values

Returns
True, if item was deleted from eset; nil otherwise

See also
    add-to-eset
    in-eset
    make-eset

Examples

  > (defparameter *eset* (make-eset))
  *eset
  > (add-to-eset 'x *eset*)
  x
  > (in-eset 'x *eset*)
  x
  t
  > (delete-from-eset 'x *eset*)
  t
  > (in-eset 'x *eset*)
  nil
  nil
  > (delete-from-eset 'x *eset*)
  nil
  > 

delete-from-eset