openLog

 

 

Description

The openLog function writes the displayed string on the console to a new or an existing file. If the file is existing, it maybe cleared of its contents by having an argument clear:. If the file is existing by default it will append the displayed strings. Timestamps may or may not be written for each displayed line by having timing: or notiming: as an argument. Only one log may be opened for each context.

When to use

Use the openLog function to write the displayed console lines to a log file.

 

Syntax

(openLog aFilename [options] [aNote])



Name Description AIS Types
aFilename The name of the log file.String
clear: Symbollic argument to clear an existing file before writing the log.Symbol
timing: Symbollic argument to include the timestamp on each line for the log.Symbol
notiming: Symbollic argument to not include the timestamp on each line for the log.Symbol
aNote Optional information to be written to the log.String


Returns:

Returns the Boolean value true, or false if an error occurred. This function will also return false if a log file is already open.

 

Examples

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

 

Argument Types

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

String Symbol

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) balance(Lambda)
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)
boolean(Boolean) 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) clean(String) closeLog(FileIO) code(String)
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) compress(ByteVector)
cons(Pair) count(Dictionary) count(Directory) count(List)
count(Matrix) count(NumMatrix) count(Pair) count(Structure)
count(Vector) date(Date) day(Date) days360(Date)
debugBrowsableProcs(Context) debugBrowsableProcs(Lambda) debugDialog(String) debug(Context)
debug(Lambda) defchild(Lambda) define(macro)(Lambda) 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) defun(Lambda) 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)
evalInSyncLocalContext(Context) eval(Lambda) eval(List) exportTab(Lambda)
exportTab(ObjectRepository) fileReadRecord(ByteVector) fileReadRecord(String) fileReadRecord(Text)
find(String) gc(Context) getContextPtr(Context) getGlobalValue(Context)
getGlobalValue(Symbol) getHttp(String) getHttp(Text) getSymbolTable(Context)
getSymbolTable(Symbol) globalBinding(Context) globalBinding(Lambda) hashString(String)
hashString(Symbol) hour(Date) importTab(Lambda) importTab(ObjectRepository)
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)
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) julian(Date)
left(String) 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)
list(List) loadLib(String) loadWorkspace(Context) macroReplace(String)
makeQuotedList(List) makeQuotedSymbol(Symbol) 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)
mid(String) minute(Date) money(Number) month(Date)
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) openLog(FileIO) openLog(String) pair(Pair)
parse(String) postHttp(String) postHttp(Text) proplist(Symbol)
proprecord(Symbol) putprop(Symbol) readHtmlPage(String) readHtmlPage(Text)
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) replace(String)
rept(String) requestHttp(String) requestHttp(Text) right(String)
run(ByteVector) run(Text) saveImmediate(ObjectRepository) saveObject(ByteVector)
saveObject(Integer) saveRepository(ObjectRepository) saveWorkspace(Context) second(Date)
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) 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) stringCiEQ(String) stringCiGE(String) stringCiGT(String)
stringCiLE(String) stringCiLT(String) stringCiNE(String) stringFill(String)
stringToBVector(String) stringToVector(String) string(Complex) string(String)
submit(Context) substitute(String) substringCiEQ(String) substringCiGE(String)
substringCiGT(String) substringCiLE(String) substringCiLT(String) substringCiNE(String)
substringEQ(String) substringFill(String) substringGE(String) substringGT(String)
substringLE(String) substringLT(String) substringNE(String) substring(String)
svmRegression(Vector) symbol(Symbol) system(ByteVector) system(Text)
testFunction(Structure) text(String) time(Date) trim(String)
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)
upcase(String) upcase(Symbol) vectorFill(BitVector) vectorFill(FltVector)
vectorFill(IntVector) vectorFill(Matrix) vectorFill(NumMatrix) vectorFill(NumVector)
vectorFill(ObjVector) vectorFill(ShortVector) vectorFill(Vector) writeln(ByteVector)
writeln(String) writeln(Text) year(Date)

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