find-buffer

   

• (send a-mred:buffer-group find-buffer type pred otherwise) -> a  wx:media-buffer% or #f object
      type : symbol
      pred : a procedure that takes two arguments, a string, and a  wx:media-edit% object and returns a boolean
      otherwise : A thunk whose return value may be returned by the method.

  Searches for a buffer of type type using pred as a predicate. pred is passed each buffer's name and buffer object; if the name passed to pred is #f, then the get-filename method of the buffer should be used to get the buffer's name. A buffer object is returned if one can be found. If no buffer is found, then otherwise is invoked (with no arguments) to obtain a result. The otherwise argument is optional; it defaults to a procedure that returns #f.