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# Compatibility Members for QByteArray

The following class members are part of the Qt 3 compatibility layer. They are provided to help you port old code to Qt 4. We strongly advise against using them in new code.

QByteArray class reference

### Public Functions

- QByteArray ( int size )
- QByteArray & duplicate ( const QByteArray & a )
- QByteArray & duplicate ( const char * a, uint n )
- int find ( char c, int from = 0 ) const
- int find ( const char * c, int from = 0 ) const
- int find ( const QByteArray & ba, int from = 0 ) const
- int find ( const QString & s, int from = 0 ) const
- int findRev ( char c, int from = -1 ) const
- int findRev ( const char * c, int from = -1 ) const
- int findRev ( const QByteArray & ba, int from = -1 ) const
- int findRev ( const QString & s, int from = -1 ) const
- QByteArray leftJustify ( uint width, char fill = ' ', bool truncate = false ) const
- QByteArray lower () const
- void resetRawData ( const char * data, uint n )
- QByteArray rightJustify ( uint width, char fill = ' ', bool truncate = false ) const
- QByteArray & setRawData ( const char * a, uint n )
- QByteArray simplifyWhiteSpace () const
- QByteArray stripWhiteSpace () const
- QByteArray upper () const

## Member Function Documentation

### QByteArray::QByteArray ( int size )

Use QByteArray(int, char) instead.

### QByteArray & QByteArray::duplicate ( const QByteArray & a )

Use simple assignment instead. (QByteArray uses implicit sharing so if you modify a copy, only the copy is changed.)

### QByteArray & QByteArray::duplicate ( const char * a, uint n )

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Use simple assignment instead. (QByteArray uses implicit sharing so if you modify a copy, only the copy is changed.)

### int QByteArray::find ( char c, int from = 0 ) const

Use indexOf() instead.

### int QByteArray::find ( const char * c, int from = 0 ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Use indexOf() instead.

### int QByteArray::find ( const QByteArray & ba, int from = 0 ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Use indexOf() instead.

### int QByteArray::find ( const QString & s, int from = 0 ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Use indexOf() instead.

### int QByteArray::findRev ( char c, int from = -1 ) const

Use lastIndexOf() instead.

### int QByteArray::findRev ( const char * c, int from = -1 ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Use lastIndexOf() instead.

### int QByteArray::findRev ( const QByteArray & ba, int from = -1 ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Use lastIndexOf() instead.

### int QByteArray::findRev ( const QString & s, int from = -1 ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Use lastIndexOf() instead.

### QByteArray QByteArray::leftJustify ( uint width, char fill = ' ', bool truncate = false ) const

Use leftJustified() instead.

### QByteArray QByteArray::lower () const

Use toLower() instead.

### void QByteArray::resetRawData ( const char * data, uint n )

Use clear() instead.

### QByteArray QByteArray::rightJustify ( uint width, char fill = ' ', bool truncate = false ) const

Use rightJustified() instead.

### QByteArray & QByteArray::setRawData ( const char * a, uint n )

Use fromRawData() instead.

### QByteArray QByteArray::simplifyWhiteSpace () const

Use simplified() instead.

### QByteArray QByteArray::stripWhiteSpace () const

Use trimmed() instead.

### QByteArray QByteArray::upper () const

Use toUpper() instead.