cdr

 

 

Description

The cdr function returns the tail of the specified object.

.

When to use

The cdr function is the only function to reference the tail of a structure ,dictionary, directory, vector, Brick or matrix. The ref function will not return the tail nor will indexing with the [ ] operators return the tail.

 

Syntax

(cdr directory)



Name Description AIS Types
directory The directory argument. Directory


Returns:

If the directory contains a cdr (or tail) it will return the tail otherwise, cdr will return #void

 

Examples

Here are a number of links to Lambda coding examples which contain this instruction in various use cases.

Example_Directory_cdr_004

This example shows that the tail key-binding value of a Directory must first be defined before it can be accessed by the cdr function. If no tail value is defined, then the cdr function returns #void.

 

Argument Types

Here are the links to the data types of the function arguments.

Structure Dictionary Directory Vector
Brick Symbol Matrix Pair
List ShortVector FltVector IntVector
NumVector ObjVector CpxVector BitVector
NumMatrix

Here are also a number of links to functions having arguments with any of these data types.

++(Symbol) +=(Symbol) /=(Symbol) *=(Symbol)
--(Symbol) -=(Symbol) addMethod(BitVector) addMethod(Boolean)
addMethod(Brick) addMethod(Character) addMethod(CpxVector) addMethod(Date)
addMethod(Dictionary) addMethod(Directory) addMethod(FltVector) addMethod(Function)
addMethod(IntVector) addMethod(List) addMethod(Matrix) addMethod(NumMatrix)
addMethod(NumVector) addMethod(Number) addMethod(ObjVector) addMethod(ObjectRepository)
addMethod(Pair) addMethod(PcodeVector) addMethod(ShortVector) addMethod(String)
addMethod(Structure) addMethod(Symbol) addMethod(Vector) addMethod(Void)
appendWriteln(ByteVector) append(BitVector) append(Complex) append(CpxVector)
append(FltVector) append(IntVector) append(Matrix) append(NumMatrix)
append(NumVector) append(ObjVector) append(Pair) append(ShortVector)
append(String) append(Structure) append(Symbol) append(Vector)
apply(BitVector) apply(CpxVector) apply(FltVector) apply(IntVector)
apply(Matrix) apply(NumMatrix) apply(NumVector) apply(Pair)
apply(ShortVector) apply(Structure) apply(Vector) associate(Pair)
binaryInsert(CpxVector) binaryInsert(FltVector) binaryInsert(IntVector) binaryInsert(Matrix)
binaryInsert(NumMatrix) binaryInsert(NumVector) binaryInsert(ShortVector) binaryInsert(Structure)
binaryInsert(Vector) binarySearch(CpxVector) binarySearch(Dictionary) binarySearch(FltVector)
binarySearch(IntVector) binarySearch(Matrix) binarySearch(NumMatrix) binarySearch(NumVector)
binarySearch(ObjVector) binarySearch(ShortVector) binarySearch(Structure) binarySearch(Vector)
bitToIntegerVector(BitVector) bitToIntegerVector(IntVector) bitToNumberVector(BitVector) bitToNumberVector(NumVector)
boolean(Boolean) c..r(List) car(List) car(Pair)
cdr(BitVector) cdr(Brick) cdr(CpxVector) cdr(Dictionary)
cdr(Directory) cdr(FltVector) cdr(IntVector) cdr(List)
cdr(Matrix) cdr(NumMatrix) cdr(NumVector) cdr(ObjVector)
cdr(ShortVector) cdr(Structure) cdr(Vector) character(Character)
compareEQ(BitVector) compareEQ(Boolean) compareEQ(Brick) compareEQ(Character)
compareEQ(Complex) compareEQ(CpxVector) compareEQ(Date) compareEQ(Dictionary)
compareEQ(Directory) compareEQ(FltVector) compareEQ(Function) compareEQ(IntVector)
compareEQ(Lambda) compareEQ(List) compareEQ(Matrix) compareEQ(NumMatrix)
compareEQ(NumVector) compareEQ(Number) compareEQ(ObjVector) compareEQ(ObjectRepository)
compareEQ(Pair) compareEQ(ShortVector) compareEQ(String) compareEQ(Structure)
compareEQ(Symbol) compareEQ(Vector) compareEQ(Void) compareGE(BitVector)
compareGE(Boolean) compareGE(Brick) compareGE(Character) compareGE(Complex)
compareGE(CpxVector) compareGE(Date) compareGE(Dictionary) compareGE(Directory)
compareGE(Function) compareGE(IntVector) compareGE(Lambda) compareGE(List)
compareGE(Matrix) compareGE(NumMatrix) compareGE(Number) compareGE(ObjVector)
compareGE(ObjectRepository) compareGE(Pair) compareGE(ShortVector) compareGE(String)
compareGE(Structure) compareGE(Symbol) compareGE(Vector) compareGE(Void)
compareGT(BitVector) compareGT(Boolean) compareGT(Brick) compareGT(Character)
compareGT(Complex) compareGT(CpxVector) compareGT(Date) compareGT(Dictionary)
compareGT(Directory) compareGT(Function) compareGT(IntVector) compareGT(Lambda)
compareGT(List) compareGT(Matrix) compareGT(NumMatrix) compareGT(NumVector)
compareGT(Number) compareGT(ObjVector) compareGT(ObjectRepository) compareGT(Pair)
compareGT(ShortVector) compareGT(String) compareGT(Structure) compareGT(Symbol)
compareGT(Vector) compareGT(Void) compareLE(BitVector) compareLE(Boolean)
compareLE(Brick) compareLE(Character) compareLE(Complex) compareLE(CpxVector)
compareLE(Date) compareLE(Dictionary) compareLE(Directory) compareLE(FltVector)
compareLE(Function) compareLE(IntVector) compareLE(Lambda) compareLE(List)
compareLE(Matrix) compareLE(NumMatrix) compareLE(NumVector) compareLE(Number)
compareLE(ObjVector) compareLE(ObjectRepository) compareLE(Pair) compareLE(ShortVector)
compareLE(String) compareLE(Structure) compareLE(Symbol) compareLE(Vector)
compareLE(Void) compareLT(BitVector) compareLT(Boolean) compareLT(Brick)
compareLT(Character) compareLT(Complex) compareLT(CpxVector) compareLT(Date)
compareLT(Dictionary) compareLT(Directory) compareLT(FltVector) compareLT(Function)
compareLT(IntVector) compareLT(Lambda) compareLT(List) compareLT(Matrix)
compareLT(NumMatrix) compareLT(NumVector) compareLT(Number) compareLT(ObjVector)
compareLT(ObjectRepository) compareLT(Pair) compareLT(ShortVector) compareLT(String)
compareLT(Structure) compareLT(Symbol) compareLT(Vector) compareLT(Void)
compareNE(BitVector) compareNE(Boolean) compareNE(Brick) compareNE(Character)
compareNE(Complex) compareNE(CpxVector) compareNE(Date) compareNE(Dictionary)
compareNE(Directory) compareNE(FltVector) compareNE(Function) compareNE(IntVector)
compareNE(Lambda) compareNE(List) compareNE(Matrix) compareNE(NumMatrix)
compareNE(NumVector) compareNE(Number) compareNE(ObjVector) compareNE(ObjectRepository)
compareNE(Pair) compareNE(ShortVector) compareNE(String) compareNE(Structure)
compareNE(Symbol) compareNE(Vector) compareNE(Void) compare(BitVector)
compare(Boolean) compare(Brick) compare(Character) compare(Complex)
compare(CpxVector) compare(Date) compare(Dictionary) compare(Directory)
compare(FltVector) compare(Function) compare(IntVector) compare(Lambda)
compare(List) compare(Matrix) compare(NumMatrix) compare(NumVector)
compare(Number) compare(ObjVector) compare(ObjectRepository) compare(Pair)
compare(ShortVector) compare(String) compare(Structure) compare(Symbol)
compare(Vector) compare(Void) comparison(BitVector) comparison(Boolean)
comparison(Brick) comparison(Character) comparison(Complex) comparison(Date)
comparison(Dictionary) comparison(Directory) comparison(FltVector) comparison(Function)
comparison(IntVector) comparison(List) comparison(Matrix) comparison(NumMatrix)
comparison(NumVector) comparison(Number) comparison(ObjVector) comparison(ObjectRepository)
comparison(Pair) comparison(ShortVector) comparison(String) comparison(Structure)
comparison(Symbol) comparison(Vector) comparison(Void) compile(Lambda)
compile(List) compress(ByteVector) cons(Pair) copy(BitVector)
copy(Brick) copy(CpxVector) copy(Dictionary) copy(Directory)
copy(FltVector) copy(IntVector) copy(Lambda) copy(List)
copy(Matrix) copy(NumMatrix) copy(NumVector) copy(ObjVector)
copy(Pair) copy(PcodeVector) copy(ShortVector) copy(Structure)
copy(Vector) count(Dictionary) count(Directory) count(List)
count(Matrix) count(NumMatrix) count(Pair) count(Structure)
count(Vector) debugDialog(String) debug(Context) debug(Lambda)
defchild(Lambda) define(macro)(Lambda) defineStructure(Structure) define(Lambda)
defmacro(Lambda) defmethod(BitVector) defmethod(Boolean) defmethod(Brick)
defmethod(Character) defmethod(Date) defmethod(Dictionary) defmethod(Directory)
defmethod(FltVector) defmethod(Function) defmethod(IntVector) defmethod(List)
defmethod(Matrix) defmethod(NumMatrix) defmethod(NumVector) defmethod(Number)
defmethod(ObjectRepository) defmethod(Pair) defmethod(ShortVector) defmethod(String)
defmethod(Structure) defmethod(Symbol) defmethod(Vector) defmethod(Void)
deforphan(Lambda) defriend(Lambda) defstruct(Structure) defun(Lambda)
deleteRows(Brick) delete(Dictionary) delete(Directory) delete(FltVector)
delete(IntVector) delete(List) delete(Matrix) delete(NumMatrix)
delete(NumVector) delete(ObjVector) delete(ObjectRepository) delete(Pair)
delete(ShortVector) delete(Structure) delete(Vector) disassemble(Context)
disassemble(Lambda) display(ByteVector) display(FileIO) downcase(String)
downcase(Symbol) encode(ByteVector) eval(Lambda) eval(List)
exportTab(Lambda) exportTab(ObjectRepository) fieldsOf(Structure) findBlock(BitVector)
find(String) freeBlock(BitVector) gc(Context) getGlobalValue(Context)
getGlobalValue(Symbol) getSymbolTable(Context) getSymbolTable(Symbol) globalBinding(Context)
globalBinding(Lambda) importTab(Lambda) importTab(ObjectRepository) insertRows(Brick)
insert(Dictionary) insert(Directory) insert(FltVector) insert(IntVector)
insert(Matrix) insert(NumMatrix) insert(NumVector) insert(ObjVector)
insert(ShortVector) insert(Structure) insert(Vector) inside(BitVector)
inside(Dictionary) inside(Directory) inside(IntVector) inside(List)
inside(Matrix) inside(NumMatrix) inside(NumVector) inside(ShortVector)
inside(Structure) inside(Vector) inspect(Context) inspect(Lambda)
inspect(ObjectRepository) integer(Integer) isAtom(BitVector) isAtom(Brick)
isAtom(Dictionary) isAtom(Directory) isAtom(FltVector) isAtom(IntVector)
isAtom(List) isAtom(Matrix) isAtom(NumMatrix) isAtom(NumVector)
isAtom(ObjVector) isAtom(Pair) isAtom(PcodeVector) isAtom(ShortVector)
isAtom(Structure) isAtom(Vector) isBitVector(BitVector) isBoolean(Boolean)
isBound(Dictionary) isBound(Directory) isBound(Structure) isByteVector(ByteVector)
isCharAlphabetic(ByteVector) isCharAlphabetic(String) isCharAlphabetic(Symbol) isCharAlphanumeric(ByteVector)
isCharAlphanumeric(String) isCharAlphanumeric(Symbol) isCharLowercase(ByteVector) isCharLowercase(String)
isCharLowercase(Symbol) isCharName(ByteVector) isCharName(String) isCharName(Symbol)
isCharNumeric(ByteVector) isCharNumeric(String) isCharNumeric(Symbol) isCharUppercase(ByteVector)
isCharUppercase(String) isCharUppercase(Symbol) isCharWhitespace(ByteVector) isCharWhitespace(String)
isCharWhitespace(Symbol) isChar(String) isCharacter(Character) isComplex(Complex)
isDate(Date) isDictionary(Dictionary) isDirectory(Directory) isEqual(BitVector)
isEqual(Boolean) isEqual(Brick) isEqual(Character) isEqual(Complex)
isEqual(Date) isEqual(Dictionary) isEqual(Directory) isEqual(FltVector)
isEqual(Function) isEqual(IntVector) isEqual(List) isEqual(Matrix)
isEqual(NumMatrix) isEqual(NumVector) isEqual(Number) isEqual(ObjVector)
isEqual(Pair) isEqual(ShortVector) isEqual(String) isEqual(Structure)
isEqual(Vector) isEqual(Void) isError(Error) isFloatVector(FltVector)
isIdentical(BitVector) isIdentical(Boolean) isIdentical(Brick) isIdentical(Character)
isIdentical(Complex) isIdentical(Date) isIdentical(Dictionary) isIdentical(Directory)
isIdentical(Error) isIdentical(FltVector) isIdentical(Function) isIdentical(IntVector)
isIdentical(List) isIdentical(Matrix) isIdentical(NumMatrix) isIdentical(NumVector)
isIdentical(Number) isIdentical(ObjVector) isIdentical(ObjectRepository) isIdentical(Pair)
isIdentical(PcodeVector) isIdentical(ShortVector) isIdentical(Structure) isIdentical(Vector)
isIdentical(Void) isInside(BitVector) isInside(Dictionary) isInside(Directory)
isInside(IntVector) isInside(List) isInside(Matrix) isInside(NumMatrix)
isInside(NumVector) isInside(ObjVector) isInside(Pair) isInside(ShortVector)
isInside(Structure) isInside(Vector) isIntegerVector(IntVector) isInteger(Integer)
isMatrix(Matrix) isMember(BitVector) isMember(Dictionary) isMember(Directory)
isMember(IntVector) isMember(List) isMember(Matrix) isMember(NumMatrix)
isMember(NumVector) isMember(ObjVector) isMember(Pair) isMember(ShortVector)
isMember(Structure) isMember(Vector) isMoney(Number) isNumberMatrix(NumMatrix)
isNumberVector(NumVector) isNumber(Number) isObjectVector(ObjVector) isObject(BitVector)
isObject(Brick) isObject(ByteVector) isObject(Dictionary) isObject(Directory)
isObject(FltVector) isObject(IntVector) isObject(List) isObject(Matrix)
isObject(NumMatrix) isObject(NumVector) isObject(ObjVector) isObject(Pair)
isObject(PcodeVector) isObject(ShortVector) isObject(String) isObject(Structure)
isObject(Symbol) isObject(Vector) isPair(List) isPair(Pair)
isPcodeVector(PcodeVector) isString(String) isStructure(Structure) isSymbol(Symbol)
isText(String) isType(BitVector) isType(Boolean) isType(Brick)
isType(Character) isType(Complex) isType(Date) isType(Dictionary)
isType(Directory) isType(FltVector) isType(Function) isType(IntVector)
isType(Matrix) isType(NumMatrix) isType(NumVector) isType(Number)
isType(ObjVector) isType(ObjectRepository) isType(Pair) isType(ShortVector)
isType(String) isType(Structure) isType(Symbol) isType(Vector)
isType(Void) isVector(Vector) last(List) length(BitVector)
length(Brick) length(Dictionary) length(Directory) length(FltVector)
length(IntVector) length(List) length(Matrix) length(NumMatrix)
length(NumVector) length(ObjVector) length(ObjectRepository) length(Pair)
length(PcodeVector) length(ShortVector) length(String) length(Structure)
length(Symbol) length(Vector) lisp(Lambda) lisp(List)
list(List) loadRepository(ObjectRepository) macroReplace(String) makeDictionary(Dictionary)
makeGaussianMatrix(NumMatrix) makeGramMatrix(NumMatrix) makeQuotedList(List) makeQuotedSymbol(Symbol)
makeStructure(Structure) map(Dictionary) map(Directory) map(FltVector)
map(IntVector) map(List) map(Matrix) map(NumMatrix)
map(NumVector) map(Pair) map(ShortVector) map(Structure)
map(Vector) mapc(Dictionary) mapc(Directory) mapc(FltVector)
mapc(IntVector) mapc(List) mapc(Matrix) mapc(NumMatrix)
mapc(NumVector) mapc(Pair) mapc(ShortVector) mapc(Structure)
mapc(Vector) matrixGaussianEliminate(NumMatrix) matrixGaussianSubstitute(NumMatrix) member(BitVector)
member(Dictionary) member(Directory) member(IntVector) member(List)
member(Matrix) member(NumMatrix) member(NumVector) member(ObjVector)
member(ShortVector) member(Structure) member(Vector) methodsOf(BitVector)
methodsOf(Boolean) methodsOf(Brick) methodsOf(Character) methodsOf(Complex)
methodsOf(Date) methodsOf(Dictionary) methodsOf(Directory) methodsOf(FltVector)
methodsOf(Function) methodsOf(IntVector) methodsOf(List) methodsOf(Matrix)
methodsOf(NumMatrix) methodsOf(NumVector) methodsOf(Number) methodsOf(ObjVector)
methodsOf(ObjectRepository) methodsOf(Pair) methodsOf(PcodeVector) methodsOf(ShortVector)
methodsOf(String) methodsOf(Structure) methodsOf(Symbol) methodsOf(Vector)
methodsOf(Void) money(Number) morph(List) new(BitVector)
new(Brick) new(ByteVector) new(CpxVector) new(Dictionary)
new(Directory) new(FltVector) new(IntVector) new(Lambda)
new(Matrix) new(NumMatrix) new(NumVector) new(ObjVector)
new(ObjectRepository) new(PcodeVector) new(ShortVector) new(String)
new(Structure) new(Symbol) new(Vector) number(Number)
objectToDictionary(Dictionary) objectToDirectory(Directory) objectToList(List) objectToMatrix(Matrix)
objectToNumMatrix(NumMatrix) objectToNumVector(NumVector) objectToStructure(Structure) objectToVector(Vector)
openLog(FileIO) openLog(String) pair(Pair) parse(String)
postHttp(String) postHttp(Text) product(Number) proplist(Symbol)
proprecord(Symbol) putprop(Symbol) quote(List) rank(Matrix)
rank(NumMatrix) refAttributes(Dictionary) refAttributes(Directory) refAttributes(Structure)
refAttributes(Vector) refValues(Dictionary) refValues(Directory) refValues(Structure)
refValues(Vector) ref(BitVector) ref(Boolean) ref(Brick)
ref(Character) ref(Complex) ref(Date) ref(Dictionary)
ref(Directory) ref(FltVector) ref(Function) ref(IntVector)
ref(Lambda) ref(List) ref(Matrix) ref(NumMatrix)
ref(NumVector) ref(Number) ref(ObjVector) ref(ObjectRepository)
ref(PcodeVector) ref(ShortVector) ref(String) ref(Structure)
ref(Symbol) ref(Vector) ref(Void) remProp(Symbol)
remove(BitVector) remove(Dictionary) remove(Directory) remove(IntVector)
remove(Matrix) remove(NumMatrix) remove(NumVector) remove(ObjVector)
remove(ShortVector) remove(Structure) remove(Vector) rename(ObjectRepository)
resize(BitVector) resize(Dictionary) resize(Directory) resize(FltVector)
resize(IntVector) resize(Matrix) resize(NumMatrix) resize(NumVector)
resize(ObjVector) resize(ShortVector) resize(Structure) resize(Vector)
reverse(BitVector) reverse(FltVector) reverse(IntVector) reverse(List)
reverse(Matrix) reverse(NumMatrix) reverse(NumVector) reverse(ObjVector)
reverse(ShortVector) reverse(Vector) saveImmediate(ObjectRepository) saveObject(ByteVector)
saveObject(Integer) saveRepository(ObjectRepository) send(BitVector) send(Boolean)
send(Brick) send(Character) send(CpxVector) send(Date)
send(Dictionary) send(Directory) send(FltVector) send(Function)
send(IntVector) send(Lambda) send(List) send(Matrix)
send(NumMatrix) send(NumVector) send(Number) send(ObjectRepository)
send(Pair) send(ShortVector) send(String) send(Structure)
send(Symbol) send(Vector) send(Void) setAttributes(Dictionary)
setAttributes(Directory) setAttributes(Structure) setAttributes(Vector) setBlock(BitVector)
setCar(List) setCar(Pair) setCdr(BitVector) setCdr(Brick)
setCdr(Dictionary) setCdr(Directory) setCdr(FltVector) setCdr(IntVector)
setCdr(List) setCdr(Matrix) setCdr(NumMatrix) setCdr(NumVector)
setCdr(ObjVector) setCdr(Pair) setCdr(ShortVector) setCdr(Structure)
setCdr(Vector) setLastCdr(BitVector) setLastCdr(FltVector) setLastCdr(IntVector)
setLastCdr(List) setLastCdr(Matrix) setLastCdr(NumMatrix) setLastCdr(NumVector)
setLastCdr(ObjVector) setLastCdr(Structure) setLastCdr(Vector) set(ObjectRepository)
setf(ObjectRepository) setq(BitVector) setq(Boolean) setq(Brick)
setq(Character) setq(Date) setq(Dictionary) setq(Directory)
setq(FltVector) setq(IntVector) setq(Lambda) setq(List)
setq(Matrix) setq(NumVector) setq(Number) setq(ObjVector)
setq(ObjectRepository) setq(PcodeVector) setq(ShortVector) setq(String)
setq(Structure) setq(Symbol) setq(Vector) setq(Void)
sizeof(BitVector) sizeof(Boolean) sizeof(Brick) sizeof(ByteVector)
sizeof(Character) sizeof(Complex) sizeof(Date) sizeof(Dictionary)
sizeof(Directory) sizeof(FltVector) sizeof(Function) sizeof(IntVector)
sizeof(List) sizeof(Matrix) sizeof(NumMatrix) sizeof(NumVector)
sizeof(Number) sizeof(ObjVector) sizeof(ObjectRepository) sizeof(Pair)
sizeof(PcodeVector) sizeof(ShortVector) sizeof(String) sizeof(Structure)
sizeof(Symbol) sizeof(Vector) sizeof(Void) sort(BitVector)
sort(Dictionary) sort(Directory) sort(FltVector) sort(IntVector)
sort(List) sort(Matrix) sort(NumMatrix) sort(NumVector)
sort(ObjVector) sort(ShortVector) sort(Structure) sort(Vector)
stringToBVector(String) stringToVector(String) string(Complex) string(String)
svmRegression(Vector) symbol(Symbol) type(BitVector) type(Boolean)
type(Brick) type(ByteVector) type(Character) type(Complex)
type(Date) type(Dictionary) type(Directory) type(FltVector)
type(Function) type(IntVector) type(Lambda) type(Matrix)
type(NumMatrix) type(NumVector) type(Number) type(ObjVector)
type(ObjectRepository) type(Pair) type(PcodeVector) type(ShortVector)
type(String) type(Structure) type(Symbol) type(Vector)
type(Void) uniqueInsert(FltVector) uniqueInsert(IntVector) uniqueInsert(Matrix)
uniqueInsert(NumMatrix) uniqueInsert(NumVector) uniqueInsert(ObjVector) uniqueInsert(ShortVector)
uniqueInsert(Structure) uniqueInsert(Vector) vectorBinaryInnerProduct(NumVector) vectorBipolarInnerProduct(NumVector)
vectorCosineInnerProduct(NumVector) vectorCubeInnerProduct(NumVector) vectorDelete(Directory) vectorExpInnerProduct(NumVector)
vectorFill(BitVector) vectorFill(FltVector) vectorFill(IntVector) vectorFill(Matrix)
vectorFill(NumMatrix) vectorFill(NumVector) vectorFill(ObjVector) vectorFill(ShortVector)
vectorFill(Vector) vectorInnerProduct(NumVector) vectorLogInnerProduct(NumVector) vectorQuartInnerProduct(NumVector)
vectorQuintInnerProduct(NumVector) vectorSigmoidInnerProduct(NumVector) vectorSineInnerProduct(NumVector) vectorSquareInnerProduct(NumVector)
vectorTanInnerProduct(NumVector) vectorTanhInnerProduct(NumVector) writeln(ByteVector) writeln(String)
writeln(Text)

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