32 virtual int wordCount(QString str) = 0;
33 virtual int charCount(QString str, QChar ch) = 0;
34 virtual QString word(QString str,
int id) = 0;
35 virtual QString wordAt(QString str,
int index) = 0;
36 virtual QString repeatString(QString
string,
int n) = 0;
37 virtual QList<QVariant> longestCommonSubsequence(QList<QVariant> source, QList<QVariant> target) = 0;
38 virtual QString longestCommonSubsequence(QString source, QString target) = 0;
39 virtual QString normalizeString(QString str) = 0;