CxR Library

The (scheme cxr) library exports twenty-four procedures which are the compositions of from three to four car and cdr operations. For example caddar is defined by:

(define caddar
  (lambda (x) (car (cdr (cdr (car x))))))

The procedures car and cdr themselves and the four two-level compositions are included in the base library.

For more information see the R⁷RS Scheme Specification.

• caaar
• caadr
• cadar
• caddr
• cdaar
• cdadr
• cddar
• cdddr
• caaaar
• caaadr
• caadar
• caaddr
• cadaar
• cadadr
• caddar
• cadddr
• cdaaar
• cdaadr
• cdadar
• cdaddr
• cddaar
• cddadr
• cdddar
• cddddr

caaar

(caaar list)

caadr

(caadr list)

cadar

(cadar list)

caddr

(caddr list)

cdaar

(cdaar list)

cdadr

(cdadr list)

cddar

(cddar list)

cdddr

(cdddr list)

caaaar

(caaaar list)

caaadr

(caaadr list)

caadar

(caadar list)

caaddr

(caaddr list)

cadaar

(cadaar list)

cadadr

(cadadr list)

caddar

(caddar list)

cadddr

(cadddr list)

cdaaar

(cdaaar list)

cdaadr

(cdaadr list)

cdadar

(cdadar list)

cdaddr

(cdaddr list)

cddaar

(cddaar list)

cddadr

(cddadr list)

cdddar

(cdddar list)

cddddr

(cddddr list)