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Referencia de la Clase QStringList

The QStringList class provides a list of strings. Más...

#include <qstringlist.h>

Diagrama de herencias de QStringList
QValueList< QString > QValueList< QString >

Lista de todos los miembros.

Métodos públicos

 QStringList ()
 QStringList (const QStringList &l)
 QStringList (const QValueList< QString > &l)
 QStringList (const QString &i)
 QStringList (const char *i)
void sort ()
QString join (const QString &sep) const
QStringList grep (const QString &str, bool cs=TRUE) const
QStringList grep (const QRegExp &expr) const
QStringList & gres (const QString &before, const QString &after, bool cs=TRUE)
QStringList & gres (const QRegExp &expr, const QString &after)
 QStringList ()
 QStringList (const QStringList &l)
 QStringList (const QValueList< QString > &l)
 QStringList (const QString &i)
 QStringList (const char *i)
void sort ()
QString join (const QString &sep) const
QStringList grep (const QString &str, bool cs=TRUE) const
QStringList grep (const QRegExp &expr) const
QStringList & gres (const QString &before, const QString &after, bool cs=TRUE)
QStringList & gres (const QRegExp &expr, const QString &after)

Métodos públicos estáticos

static QStringList fromStrList (const QStrList &)
static QStringList split (const QString &sep, const QString &str, bool allowEmptyEntries=FALSE)
static QStringList split (const QChar &sep, const QString &str, bool allowEmptyEntries=FALSE)
static QStringList split (const QRegExp &sep, const QString &str, bool allowEmptyEntries=FALSE)
static QStringList fromStrList (const QStrList &)
static QStringList split (const QString &sep, const QString &str, bool allowEmptyEntries=FALSE)
static QStringList split (const QChar &sep, const QString &str, bool allowEmptyEntries=FALSE)
static QStringList split (const QRegExp &sep, const QString &str, bool allowEmptyEntries=FALSE)

Métodos protegidos

void detach ()
void detach ()

Amigas

class QDeepCopy< QStringList >

Descripción detallada

The QStringList class provides a list of strings.

It is used to store and manipulate strings that logically belong together. Essentially QStringList is a QValueList of QString objects. Unlike QStrList, which stores pointers to characters, QStringList holds real QString objects. It is the class of choice whenever you work with Unicode strings. QStringList is part of the Qt Template Library.

Like QString itself, QStringList objects are implicitly shared, so passing them around as value-parameters is both fast and safe.

Strings can be added to a list using append(), operator+=() or operator<<(), e.g. 

    QStringList fonts;
    fonts.append( "Times" );
    fonts += "Courier";
    fonts += "Courier New";
    fonts << "Helvetica [Cronyx]" << "Helvetica [Adobe]";

String lists have an iterator, QStringList::Iterator(), e.g. 

    for ( QStringList::Iterator it = fonts.begin(); it != fonts.end(); ++it ) {
        cout << *it << ":";
    }
    cout << endl;
    // Output:
    //  Times:Courier:Courier New:Helvetica [Cronyx]:Helvetica [Adobe]:

Many Qt functions return string lists by value; to iterate over these you should make a copy and iterate over the copy.

You can concatenate all the strings in a string list into a single string (with an optional separator) using join(), e.g. 

    QString allFonts = fonts.join( ", " );
    cout << allFonts << endl;
    // Output:
    //  Times, Courier, Courier New, Helvetica [Cronyx], Helvetica [Adobe]

You can sort the list with sort(), and extract a new list which contains only those strings which contain a particular substring (or match a particular regular expression) using the grep() functions, e.g. 

    fonts.sort();
    cout << fonts.join( ", " ) << endl;
    // Output:
    //  Courier, Courier New, Helvetica [Adobe], Helvetica [Cronyx], Times

    QStringList helveticas = fonts.grep( "Helvetica" );
    cout << helveticas.join( ", " ) << endl;
    // Output:
    //  Helvetica [Adobe], Helvetica [Cronyx]

Existing strings can be split into string lists with character, string or regular expression separators, e.g. 

    QString s = "Red\tGreen\tBlue";
    QStringList colors = QStringList::split( "\t", s );
    cout << colors.join( ", " ) << endl;
    // Output:
    //  Red, Green, Blue

Documentación del constructor y destructor

QStringList::QStringList ( ) [inline]

Creates an empty string list.

QStringList::QStringList ( const QStringList &  l) [inline]

Creates a copy of the list l. This function is very fast because QStringList is implicitly shared. In most situations this acts like a deep copy, for example, if this list or the original one or some other list referencing the same shared data is modified, the modifying list first makes a copy, i.e. copy-on-write. In a threaded environment you may require a real deep copy see QDeepCopy.

QStringList::QStringList ( const QValueList< QString > &  l) [inline]

Constructs a new string list that is a copy of l.

QStringList::QStringList ( const QString &  i) [inline]

Constructs a string list consisting of the single string i. Longer lists are easily created as follows:

    QStringList items;
    items << "Buy" << "Sell" << "Update" << "Value";
QStringList::QStringList ( const char *  i) [inline]

Constructs a string list consisting of the single Latin-1 string i.

QStringList::QStringList ( ) [inline]
QStringList::QStringList ( const QStringList &  l) [inline]
QStringList::QStringList ( const QValueList< QString > &  l) [inline]
QStringList::QStringList ( const QString &  i) [inline]
QStringList::QStringList ( const char *  i) [inline]

Documentación de las funciones miembro

void QStringList::detach ( ) [inline, protected]

Reimplementado de QValueList< QString >.

void QStringList::detach ( ) [inline, protected]

Helpers

Reimplementado de QValueList< QString >.

QStringList QStringList::fromStrList ( const QStrList &  ascii) [static]

Converts from an ASCII-QStrList ascii to a QStringList (Unicode).

static QStringList QStringList::fromStrList ( const QStrList &  ) [static]
QStringList QStringList::grep ( const QString &  str,
bool  cs = TRUE 
) const
QStringList QStringList::grep ( const QRegExp &  expr) const
QStringList QStringList::grep ( const QRegExp &  rx) const

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Returns a list of all the strings that match the regular expression rx.

Ver también:
QString::find()
QStringList QStringList::grep ( const QString &  str,
bool  cs = TRUE 
) const

Returns a list of all the strings containing the substring str.

If cs is TRUE, the grep is done case-sensitively; otherwise case is ignored.

    QStringList list;
    list << "Bill Gates" << "John Doe" << "Bill Clinton";
    list = list.grep( "Bill" );
    // list == ["Bill Gates", "Bill Clinton"]
Ver también:
QString::find()
QStringList & QStringList::gres ( const QString &  before,
const QString &  after,
bool  cs = TRUE 
)

Replaces every occurrence of the string before in the strings that constitute the string list with the string after. Returns a reference to the string list.

If cs is TRUE, the search is case sensitive; otherwise the search is case insensitive.

Example: 

    QStringList list;
    list << "alpha" << "beta" << "gamma" << "epsilon";
    list.gres( "a", "o" );
    // list == ["olpho", "beto", "gommo", "epsilon"]
Ver también:
QString::replace()
QStringList& QStringList::gres ( const QRegExp &  expr,
const QString &  after 
)
QStringList& QStringList::gres ( const QString &  before,
const QString &  after,
bool  cs = TRUE 
)
QStringList & QStringList::gres ( const QRegExp &  rx,
const QString &  after 
)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Replaces every occurrence of the regexp rx in the string with after. Returns a reference to the string list.

Example: 

    QStringList list;
    list << "alpha" << "beta" << "gamma" << "epsilon";
    list.gres( QRegExp("^a"), "o" );
    // list == ["olpha", "beta", "gamma", "epsilon"]

For regexps containing capturing parentheses , occurrences of \1, \2, ..., in after are replaced with {rx}.cap(1), cap(2), ...

Example: 

    QStringList list;
    list << "Bill Clinton" << "Gates, Bill";
    list.gres( QRegExp("^(.*), (.*)$"), "\\2 \\1" );
    // list == ["Bill Clinton", "Bill Gates"]
Ver también:
QString::replace()
QString QStringList::join ( const QString &  sep) const
QString QStringList::join ( const QString &  sep) const

Joins the string list into a single string with each element separated by the string sep (which can be empty).

Ver también:
split()
void QStringList::sort ( )

Sorts the list of strings in ascending case-sensitive order.

Sorting is very fast. It uses the Qt Template Library's efficient HeapSort implementation that has a time complexity of O(n*log n).

If you want to sort your strings in an arbitrary order consider using a QMap. For example you could use a QMap<QString,QString> to create a case-insensitive ordering (e.g. mapping the lowercase text to the text), or a QMap<int,QString> to sort the strings by some integer index, etc.

void QStringList::sort ( )
static QStringList QStringList::split ( const QRegExp &  sep,
const QString &  str,
bool  allowEmptyEntries = FALSE 
) [static]
QStringList QStringList::split ( const QRegExp &  sep,
const QString &  str,
bool  allowEmptyEntries = FALSE 
) [static]

Splits the string str into strings wherever the regular expression sep occurs, and returns the list of those strings.

If allowEmptyEntries is TRUE, a null string is inserted in the list wherever the separator matches twice without intervening text.

For example, if you split the string "a,,b,c" on commas, split() returns the three-item list "a", "b", "c" if allowEmptyEntries is FALSE (the default), and the four-item list "a", "", "b", "c" if allowEmptyEntries is TRUE.

If sep does not match anywhere in str, split() returns a single element list with the element containing the single string str.

Ver también:
join() QString::section()
static QStringList QStringList::split ( const QString &  sep,
const QString &  str,
bool  allowEmptyEntries = FALSE 
) [static]
QStringList QStringList::split ( const QString &  sep,
const QString &  str,
bool  allowEmptyEntries = FALSE 
) [static]

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. This version of the function uses a QString as separator, rather than a regular expression.

If sep is an empty string, the return value is a list of one-character strings: split( QString( "" ), "four" ) returns the four-item list, "f", "o", "u", "r".

If allowEmptyEntries is TRUE, a null string is inserted in the list wherever the separator matches twice without intervening text.

Ver también:
join() QString::section()
static QStringList QStringList::split ( const QChar &  sep,
const QString &  str,
bool  allowEmptyEntries = FALSE 
) [static]
QStringList QStringList::split ( const QChar &  sep,
const QString &  str,
bool  allowEmptyEntries = FALSE 
) [static]

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. This version of the function uses a QChar as separator, rather than a regular expression.

Ver también:
join() QString::section()

Documentación de las funciones relacionadas y clases amigas

QDeepCopy< QStringList > [friend]
La documentación para esta clase fue generada a partir de los siguientes ficheros:
 Todo Clases Namespaces Archivos Funciones Variables 'typedefs' Enumeraciones Valores de enumeraciones Propiedades Amigas 'defines'
Generado el Martes, 7 de Febrero de 2012 09:56:18 para Eneboo - Documentación para desarrolladores por  doxygen 1.7.4