Info Catalog elisp: List Variables elisp: Lists elisp: Sets And Lists

elisp: Modifying Lists

 
 5.6 Modifying Existing List Structure
 =====================================
 
 You can modify the CAR and CDR contents of a cons cell with the
 primitives ‘setcar’ and ‘setcdr’.  These are destructive operations
 because they change existing list structure.
 
      Common Lisp note: Common Lisp uses functions ‘rplaca’ and ‘rplacd’
      to alter list structure; they change structure the same way as
      ‘setcar’ and ‘setcdr’, but the Common Lisp functions return the
      cons cell while ‘setcar’ and ‘setcdr’ return the new CAR or CDR.
 

Menu

 
· Setcar          Replacing an element in a list.
· Setcdr          Replacing part of the list backbone.
                       This can be used to remove or add elements.
· Rearrangement   Reordering the elements in a list; combining lists.
 

Info Catalog elisp: List Variables elisp: Lists elisp: Sets And Lists