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Reference Guide
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TObjArray Class Reference

An array of TObjects.

The array expands automatically when objects are added (shrinking can be done by hand using Expand(), how nice to have meaningful names -:)). Use operator[] to have "real" array behaviour.

Note on ownership and copy: By default the TObjArray does not own the objects it points to and will not delete them unless explicitly asked (via a call to the Delete member function). To assign ownership of the content to the array, call:

myarr->SetOwner(kTRUE);

When the array owns its content a call to Clear or the deletion of the array itself will lead to the deletion of its contents.

You can either make a shallow copy of the array:

otherarr = new TObjArray(*myarr);
*otherarr = *myarr;

in which case ownership (if any) is not transfered but the other array points to the same object as the original array. Note that if the content of either array is deleted the other array is not notified in any way (i.e. still points to the now deleted objects).

You can also make a deep copy of the array:

otherarr = (TObjArray*)myarr->Clone();

in which case the array and the content are both duplicated (i.e. otherarr and myarr do not point to the same objects). If myarr is set to the be the owner of its content, otherarr will also be set to the owner of its own content.

Definition at line 37 of file TObjArray.h.

Public Types

typedef TObjArrayIter Iterator_t
 
- Public Types inherited from TCollection
enum  { kInitCapacity = 16, kInitHashTableCapacity = 17 }
 
- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kInconsistent = 0x08000000,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
 
enum  EStatusBits {
  kCanDelete = BIT(0), kMustCleanup = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5),
  kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13)
}
 

Public Member Functions

 TObjArray (Int_t s=TCollection::kInitCapacity, Int_t lowerBound=0)
 Create an object array. More...
 
 TObjArray (const TObjArray &a)
 Create a copy of TObjArray a. Note, does not copy the kIsOwner flag. More...
 
virtual ~TObjArray ()
 Delete an array. More...
 
void Add (TObject *obj)
 
virtual void AddAfter (const TObject *after, TObject *obj)
 Add object in the slot after object after. More...
 
virtual void AddAt (TObject *obj, Int_t idx)
 Add object at position ids. More...
 
virtual void AddAtAndExpand (TObject *obj, Int_t idx)
 Add object at position idx. More...
 
virtual Int_t AddAtFree (TObject *obj)
 Return the position of the new object. More...
 
virtual void AddBefore (const TObject *before, TObject *obj)
 Add object in the slot before object before. More...
 
virtual void AddFirst (TObject *obj)
 Add object in the first slot of the array. More...
 
virtual void AddLast (TObject *obj)
 Add object in the next empty slot in the array. More...
 
TObjectAfter (const TObject *obj) const
 Return the object after obj. Returns 0 if obj is last object. More...
 
TObjectAt (Int_t idx) const
 
TObjectBefore (const TObject *obj) const
 Return the object before obj. Returns 0 if obj is first object. More...
 
virtual Int_t BinarySearch (TObject *obj, Int_t upto=kMaxInt)
 Find object using a binary search. More...
 
virtual void Clear (Option_t *option="")
 Remove all objects from the array. More...
 
virtual void Compress ()
 Remove empty slots from array. More...
 
virtual void Delete (Option_t *option="")
 Remove all objects from the array AND delete all heap based objects. More...
 
virtual void Expand (Int_t newSize)
 Expand or shrink the array to newSize elements. More...
 
virtual TObjectFindObject (const char *name) const
 Find an object in this collection using its name. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Find an object in this collection using the object's IsEqual() member function. More...
 
TObjectFirst () const
 Return the object in the first slot. More...
 
Int_t GetEntries () const
 Return the number of objects in array (i.e. More...
 
Int_t GetEntriesFast () const
 
Int_t GetLast () const
 Return index of last object in array. More...
 
TObject ** GetObjectRef () const
 
TObject ** GetObjectRef (const TObject *obj) const
 Return address of pointer obj. If obj is 0 returns address of container. More...
 
Int_t IndexOf (const TObject *obj) const
 
Bool_t IsEmpty () const
 
TObjectLast () const
 Return the object in the last filled slot. Returns 0 if no entries. More...
 
Int_t LowerBound () const
 
TIteratorMakeIterator (Bool_t dir=kIterForward) const
 Returns an array iterator. More...
 
TObjArrayoperator= (const TObjArray &)
 Assignment operator. Note, unsets the kIsOwner flag. More...
 
virtual TObject *& operator[] (Int_t i)
 Return the object at position i. More...
 
virtual TObjectoperator[] (Int_t i) const
 Return the object at position at. Returns 0 if i is out of bounds. More...
 
virtual void Randomize (Int_t ntimes=1)
 Randomize objects inside the array, i.e. More...
 
virtual void RecursiveRemove (TObject *obj)
 Remove object from this collection and recursively remove the object from all other objects (and collections). More...
 
virtual TObjectRemove (TObject *obj)
 Remove object from array. More...
 
virtual TObjectRemoveAt (Int_t idx)
 Remove object at index idx. More...
 
virtual void RemoveRange (Int_t idx1, Int_t idx2)
 Remove objects from index idx1 to idx2 included. More...
 
void SetLast (Int_t last)
 Set index of last object in array, effectively truncating the array. More...
 
virtual void Sort (Int_t upto=kMaxInt)
 If objects in array are sortable (i.e. More...
 
TObjectUncheckedAt (Int_t i) const
 
- Public Member Functions inherited from TSeqCollection
virtual ~TSeqCollection ()
 
virtual Bool_t IsSorted () const
 
Int_t LastIndex () const
 
Long64_t Merge (TCollection *list)
 Merge this collection with all collections coming in the input list. More...
 
virtual void RemoveAfter (TObject *after)
 
virtual void RemoveBefore (TObject *before)
 
virtual void RemoveFirst ()
 
virtual void RemoveLast ()
 
void UnSort ()
 
- Public Member Functions inherited from TCollection
virtual ~TCollection ()
 TNamed destructor. More...
 
virtual void AddAll (const TCollection *col)
 Add all objects from collection col to this collection. More...
 
void AddVector (TObject *obj1,...)
 Add all arguments to the collection. More...
 
Bool_t AssertClass (TClass *cl) const
 Make sure all objects in this collection inherit from class cl. More...
 
TIter begin () const
 
void Browse (TBrowser *b)
 Browse this collection (called by TBrowser). More...
 
Int_t Capacity () const
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an collection using the Streamer facility. More...
 
Int_t Compare (const TObject *obj) const
 Compare two TCollection objects. More...
 
Bool_t Contains (const char *name) const
 
Bool_t Contains (const TObject *obj) const
 
virtual void Draw (Option_t *option="")
 Draw all objects in this collection. More...
 
virtual void Dump () const
 Dump all objects in this collection. More...
 
TIter end () const
 
virtual const char * GetName () const
 Return name of this collection. More...
 
virtual Int_t GetSize () const
 
virtual Int_t GrowBy (Int_t delta) const
 Increase the collection's capacity by delta slots. More...
 
ULong_t Hash () const
 Return hash value for this object. More...
 
Bool_t IsArgNull (const char *where, const TObject *obj) const
 Returns true if object is a null pointer. More...
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
Bool_t IsOwner () const
 
Bool_t IsSortable () const
 
virtual void ls (Option_t *option="") const
 List (ls) all objects in this collection. More...
 
virtual TIteratorMakeReverseIterator () const
 
virtual Bool_t Notify ()
 'Notify' all objects in this collection. More...
 
TObjectoperator() (const char *name) const
 Find an object in this collection by name. More...
 
virtual void Paint (Option_t *option="")
 Paint all objects in this collection. More...
 
virtual void Print (Option_t *option="") const
 Default print for collections, calls Print(option, 1). More...
 
virtual void Print (Option_t *option, Int_t recurse) const
 Print the collection header and its elements. More...
 
virtual void Print (Option_t *option, const char *wildcard, Int_t recurse=1) const
 Print the collection header and its elements that match the wildcard. More...
 
virtual void Print (Option_t *option, TPRegexp &regexp, Int_t recurse=1) const
 Print the collection header and its elements that match the regexp. More...
 
virtual void RemoveAll (TCollection *col)
 Remove all objects in collection col from this collection. More...
 
void RemoveAll ()
 
void SetCurrentCollection ()
 Set this collection to be the globally accesible collection. More...
 
void SetName (const char *name)
 
virtual void SetOwner (Bool_t enable=kTRUE)
 Set whether this collection is the owner (enable==true) of its content. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
 Write all objects in this collection. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write all objects in this collection. More...
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. More...
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
ULong_t CheckedHash ()
 Checked and record whether for this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. More...
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs. More...
 
virtual void Copy (TObject &object) const
 Copy this to obj. More...
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object. More...
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. More...
 
virtual void Execute (const char *method, const char *params, Int_t *error=0)
 Execute method on this object with the given parameter string, e.g. More...
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
 Execute method on this object with parameters stored in the TObjArray. More...
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py). More...
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
Bool_t HasInconsistentHash () const
 Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. More...
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname". More...
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl. More...
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas. More...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
void MayNotUse (const char *method) const
 Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. More...
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list. More...
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory. More...
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename. More...
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out". More...
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. More...
 
void SetBit (UInt_t f)
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object. More...
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id. More...
 
virtual void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const
 
Int_t TestBits (UInt_t f) const
 
virtual void UseCurrentStyle ()
 Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. More...
 

Protected Member Functions

Bool_t BoundsOk (const char *where, Int_t at) const
 
Int_t GetAbsLast () const
 Return absolute index to last object in array. More...
 
void Init (Int_t s, Int_t lowerBound)
 Initialize a TObjArray. More...
 
Bool_t OutOfBoundsError (const char *where, Int_t i) const
 Generate an out-of-bounds error. Always returns false. More...
 
- Protected Member Functions inherited from TSeqCollection
 TSeqCollection ()
 
virtual void Changed ()
 
- Protected Member Functions inherited from TCollection
 TCollection ()
 
virtual const char * GetCollectionEntryName (TObject *entry) const
 For given collection entry return the string that is used to identify the object and, potentially, perform wildcard/regexp filtering on. More...
 
virtual void PrintCollectionEntry (TObject *entry, Option_t *option, Int_t recurse) const
 Print the collection entry. More...
 
virtual void PrintCollectionHeader (Option_t *option) const
 Print the collection header. More...
 
- Protected Member Functions inherited from TObject
virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
 Interface to ErrorHandler (protected). More...
 
void MakeZombie ()
 

Protected Attributes

TObject ** fCont
 
Int_t fLast
 
Int_t fLowerBound
 Array contents. More...
 
- Protected Attributes inherited from TSeqCollection
Bool_t fSorted
 
- Protected Attributes inherited from TCollection
TString fName
 
Int_t fSize
 

Friends

class TClonesArray
 
class TObjArrayIter
 

Additional Inherited Members

- Static Public Member Functions inherited from TSeqCollection
static Int_t ObjCompare (TObject *a, TObject *b)
 Compare to objects in the collection. Use member Compare() of object a. More...
 
static void QSort (TObject **a, Int_t first, Int_t last)
 Sort array of TObject pointers using a quicksort algorithm. More...
 
static void QSort (TObject **a, TObject **b, Int_t first, Int_t last)
 
static void QSort (TObject **a, Int_t nBs, TObject ***b, Int_t first, Int_t last)
 Sort array a of TObject pointers using a quicksort algorithm. More...
 
- Static Public Member Functions inherited from TCollection
static void EmptyGarbageCollection ()
 Do the garbage collection. More...
 
static void GarbageCollect (TObject *obj)
 Add to the list of things to be cleaned up. More...
 
static TCollectionGetCurrentCollection ()
 Return the globally accessible collection. More...
 
static void StartGarbageCollection ()
 Set up for garbage collection. More...
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 
- Protected Types inherited from TCollection
enum  EStatusBits { kIsOwner = BIT(14) }
 

#include <TObjArray.h>

Inheritance diagram for TObjArray:
[legend]

Member Typedef Documentation

Definition at line 53 of file TObjArray.h.

Constructor & Destructor Documentation

TObjArray::TObjArray ( Int_t  s = TCollection::kInitCapacity,
Int_t  lowerBound = 0 
)

Create an object array.

Using s one can set the array size (default is kInitCapacity=16) and lowerBound can be used to set the array lowerbound index (default is 0).

Definition at line 63 of file TObjArray.cxx.

TObjArray::TObjArray ( const TObjArray a)

Create a copy of TObjArray a. Note, does not copy the kIsOwner flag.

Definition at line 77 of file TObjArray.cxx.

TObjArray::~TObjArray ( )
virtual

Delete an array.

Objects are not deleted unless the TObjArray is the owner (set via SetOwner()).

Definition at line 93 of file TObjArray.cxx.

Member Function Documentation

void TObjArray::Add ( TObject obj)
inlinevirtual

Reimplemented from TSeqCollection.

Definition at line 73 of file TObjArray.h.

void TObjArray::AddAfter ( const TObject after,
TObject obj 
)
virtual

Add object in the slot after object after.

If after=0 add object in the last empty slot. Note that this will overwrite any object that might have already been in this slot. For insertion semantics use either a TList or a TOrdCollection.

Implements TSeqCollection.

Reimplemented in TClonesArray.

Definition at line 204 of file TObjArray.cxx.

void TObjArray::AddAt ( TObject obj,
Int_t  idx 
)
virtual

Add object at position ids.

Give an error when idx is out of bounds (i.e. the array is not expanded).

Implements TSeqCollection.

Reimplemented in TClonesArray.

Definition at line 239 of file TObjArray.cxx.

void TObjArray::AddAtAndExpand ( TObject obj,
Int_t  idx 
)
virtual

Add object at position idx.

If idx is larger than the current size of the array, expand the array (double its size).

Reimplemented in TClonesArray.

Definition at line 222 of file TObjArray.cxx.

Int_t TObjArray::AddAtFree ( TObject obj)
virtual

Return the position of the new object.

Find the first empty cell or AddLast if there is no empty cell

Reimplemented in TClonesArray.

Definition at line 252 of file TObjArray.cxx.

void TObjArray::AddBefore ( const TObject before,
TObject obj 
)
virtual

Add object in the slot before object before.

If before=0 add object in the first slot. Note that this will overwrite any object that might have already been in this slot. For insertion semantics use either a TList or a TOrdCollection.

Implements TSeqCollection.

Reimplemented in TClonesArray.

Definition at line 180 of file TObjArray.cxx.

void TObjArray::AddFirst ( TObject obj)
virtual

Add object in the first slot of the array.

This will overwrite the first element that might have been there. To have insertion semantics use either a TList or a TOrdCollection.

Implements TSeqCollection.

Reimplemented in TClonesArray.

Definition at line 157 of file TObjArray.cxx.

void TObjArray::AddLast ( TObject obj)
virtual

Add object in the next empty slot in the array.

Expand the array if necessary.

Implements TSeqCollection.

Reimplemented in TClonesArray.

Definition at line 169 of file TObjArray.cxx.

TObject * TObjArray::After ( const TObject obj) const
virtual

Return the object after obj. Returns 0 if obj is last object.

Implements TSeqCollection.

Definition at line 271 of file TObjArray.cxx.

TObject * TObjArray::At ( Int_t  idx) const
inlinevirtual

Implements TSeqCollection.

Definition at line 165 of file TObjArray.h.

TObject * TObjArray::Before ( const TObject obj) const
virtual

Return the object before obj. Returns 0 if obj is first object.

Implements TSeqCollection.

Definition at line 284 of file TObjArray.cxx.

Int_t TObjArray::BinarySearch ( TObject op,
Int_t  upto = kMaxInt 
)
virtual

Find object using a binary search.

Array must first have been sorted. Search can be limited by setting upto to desired index.

Definition at line 753 of file TObjArray.cxx.

Bool_t TObjArray::BoundsOk ( const char *  where,
Int_t  at 
) const
inlineprotected

Definition at line 158 of file TObjArray.h.

void TObjArray::Clear ( Option_t option = "")
virtual

Remove all objects from the array.

Does not delete the objects unless the TObjArray is the owner (set via SetOwner()).

Implements TCollection.

Reimplemented in TClonesArray.

Definition at line 298 of file TObjArray.cxx.

void TObjArray::Compress ( )
virtual

Remove empty slots from array.

Reimplemented in TClonesArray.

Definition at line 309 of file TObjArray.cxx.

void TObjArray::Delete ( Option_t option = "")
virtual

Remove all objects from the array AND delete all heap based objects.

Implements TCollection.

Reimplemented in TClonesArray.

Definition at line 329 of file TObjArray.cxx.

void TObjArray::Expand ( Int_t  newSize)
virtual

Expand or shrink the array to newSize elements.

Reimplemented in TClonesArray.

Definition at line 358 of file TObjArray.cxx.

TObject * TObjArray::FindObject ( const char *  name) const
virtual

Find an object in this collection using its name.

Requires a sequential scan till the object has been found. Returns 0 if object with specified name is not found.

Reimplemented from TCollection.

Definition at line 384 of file TObjArray.cxx.

TObject * TObjArray::FindObject ( const TObject iobj) const
virtual

Find an object in this collection using the object's IsEqual() member function.

Requires a sequential scan till the object has been found. Returns 0 if object is not found. Typically this function is overridden by a more efficient version in concrete collection classes (e.g. THashTable).

Reimplemented from TCollection.

Definition at line 401 of file TObjArray.cxx.

TObject * TObjArray::First ( ) const
virtual

Return the object in the first slot.

Implements TSeqCollection.

Definition at line 459 of file TObjArray.cxx.

Int_t TObjArray::GetAbsLast ( ) const
protected

Return absolute index to last object in array.

Returns -1 in case array is empty.

Definition at line 496 of file TObjArray.cxx.

Int_t TObjArray::GetEntries ( ) const
virtual

Return the number of objects in array (i.e.

number of non-empty slots). Attention: use this method ONLY if you want to know the number of non-empty slots. This function loops over the complete array and is therefore very slow when applied in a loop. Most of the time you better use GetEntriesFast() (only in case when there are no empty slots).

Reimplemented from TCollection.

Definition at line 482 of file TObjArray.cxx.

Int_t TObjArray::GetEntriesFast ( ) const
inline

Definition at line 64 of file TObjArray.h.

Int_t TObjArray::GetLast ( ) const
virtual

Return index of last object in array.

Returns lowerBound-1 in case array is empty.

Reimplemented from TSeqCollection.

Definition at line 516 of file TObjArray.cxx.

TObject** TObjArray::GetObjectRef ( ) const
inline

Definition at line 68 of file TObjArray.h.

TObject ** TObjArray::GetObjectRef ( const TObject obj) const
virtual

Return address of pointer obj. If obj is 0 returns address of container.

Implements TCollection.

Definition at line 524 of file TObjArray.cxx.

Int_t TObjArray::IndexOf ( const TObject obj) const
virtual
  • obj != 0 Return index of object in array. Returns lowerBound-1 in case array doesn't contain the obj.
  • obj == 0 Return the index of the first empty slot. Returns lowerBound-1 in case array doesn't contain any empty slot.

Reimplemented from TSeqCollection.

Definition at line 540 of file TObjArray.cxx.

void TObjArray::Init ( Int_t  s,
Int_t  lowerBound 
)
protected

Initialize a TObjArray.

Definition at line 559 of file TObjArray.cxx.

Bool_t TObjArray::IsEmpty ( ) const
inlinevirtual

Reimplemented from TCollection.

Definition at line 70 of file TObjArray.h.

TObject * TObjArray::Last ( ) const
virtual

Return the object in the last filled slot. Returns 0 if no entries.

Implements TSeqCollection.

Definition at line 467 of file TObjArray.cxx.

Int_t TObjArray::LowerBound ( ) const
inline

Definition at line 96 of file TObjArray.h.

TIterator * TObjArray::MakeIterator ( Bool_t  dir = kIterForward) const
virtual

Returns an array iterator.

Implements TCollection.

Definition at line 579 of file TObjArray.cxx.

TObjArray & TObjArray::operator= ( const TObjArray a)

Assignment operator. Note, unsets the kIsOwner flag.

Definition at line 106 of file TObjArray.cxx.

TObject *& TObjArray::operator[] ( Int_t  i)
virtual

Return the object at position i.

Returns address at position 0 if i is out of bounds. Result may be used as an lvalue.

Reimplemented in TClonesArray.

Definition at line 128 of file TObjArray.cxx.

TObject * TObjArray::operator[] ( Int_t  i) const
virtual

Return the object at position at. Returns 0 if i is out of bounds.

Reimplemented in TClonesArray.

Definition at line 144 of file TObjArray.cxx.

Bool_t TObjArray::OutOfBoundsError ( const char *  where,
Int_t  i 
) const
protected

Generate an out-of-bounds error. Always returns false.

Definition at line 587 of file TObjArray.cxx.

void TObjArray::Randomize ( Int_t  ntimes = 1)
virtual

Randomize objects inside the array, i.e.

permute randomly objects. With fLast being the index of the last entry in the array, the following algorithm is applied to the array:

  • for each entry j between 0 and fLast, another entry k is chosen randomly between 0 and fLast.
  • the objects at j and k are swapped.
  • this process is repeated ntimes (ntimes = 1 by default).

Definition at line 711 of file TObjArray.cxx.

void TObjArray::RecursiveRemove ( TObject obj)
virtual

Remove object from this collection and recursively remove the object from all other objects (and collections).

Reimplemented from TCollection.

Definition at line 597 of file TObjArray.cxx.

TObject * TObjArray::Remove ( TObject obj)
virtual

Remove object from array.

Implements TCollection.

Reimplemented in TClonesArray.

Definition at line 641 of file TObjArray.cxx.

TObject * TObjArray::RemoveAt ( Int_t  idx)
virtual

Remove object at index idx.

Reimplemented from TSeqCollection.

Reimplemented in TClonesArray.

Definition at line 618 of file TObjArray.cxx.

void TObjArray::RemoveRange ( Int_t  idx1,
Int_t  idx2 
)
virtual

Remove objects from index idx1 to idx2 included.

Reimplemented in TClonesArray.

Definition at line 663 of file TObjArray.cxx.

void TObjArray::SetLast ( Int_t  last)

Set index of last object in array, effectively truncating the array.

Use carefully since whenever last position has to be recalculated, e.g. after a Remove() or Sort() it will be reset to the last non-empty slot. If last is -2 this will force the recalculation of the last used slot. If last is -1, this effectively truncate the array completely.

Definition at line 693 of file TObjArray.cxx.

void TObjArray::Sort ( Int_t  upto = kMaxInt)
virtual

If objects in array are sortable (i.e.

IsSortable() returns true for all objects) then sort array.

Reimplemented in TClonesArray.

Definition at line 732 of file TObjArray.cxx.

TObject* TObjArray::UncheckedAt ( Int_t  i) const
inline

Definition at line 89 of file TObjArray.h.

Friends And Related Function Documentation

friend class TClonesArray
friend

Definition at line 40 of file TObjArray.h.

friend class TObjArrayIter
friend

Definition at line 39 of file TObjArray.h.

Member Data Documentation

TObject** TObjArray::fCont
protected

Definition at line 43 of file TObjArray.h.

Int_t TObjArray::fLast
protected

Definition at line 45 of file TObjArray.h.

Int_t TObjArray::fLowerBound
protected

Array contents.

Definition at line 44 of file TObjArray.h.

Libraries for TObjArray:
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The documentation for this class was generated from the following files: