searching a QString in a QStringList

[Alex22]

Hi,
There is a QStringList with "n" fields. I want to search a QString in all items of the QStringList and item at index position "i" must be returned. Case Sensitive is not important. even if that QString be inside in an item, that item must be returned.

for example:

QStringList list;
    list<< "Hello" << "lombo" << "Hi" << "hlok";
    //I want to search "lo" and need to find this in:   "Hello", "lombo", "hlok" and returned items at index position 0, 1, 3

QStringList list;
    list<< "Hello" << "lombo" << "Hi" << "hlok";
    //I want to search "lo" and need to find this in:   "Hello", "lombo", "hlok" and returned items at index position 0, 1, 3

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Thanks for any help

[Lesiok]

Read about QStringList::indexOf methods.

[Alex22]

Thanks Lesiok,
I used:

QStringList list;
    list << "hello" << "heeeeee"<<"he" << "kreo" << "gry" << "hhh";
 
    qDebug() << list.indexOf(QRegExp("he", Qt::CaseInsensitive, QRegExp::W3CXmlSchema11), 0);//I checked all of PatternSyntax but for all, it  returns 2

QStringList list;
    list << "hello" << "heeeeee"<<"he" << "kreo" << "gry" << "hhh";

    qDebug() << list.indexOf(QRegExp("he", Qt::CaseInsensitive, QRegExp::W3CXmlSchema11), 0);//I checked all of PatternSyntax but for all, it  returns 2

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but always returns 2. I need it returns 0 because "he" exists in "hello" too.

[Lesiok]

I think that it should be something like that

list.indexOf(QRegExp(".*he.*", Qt::CaseInsensitive, QRegExp::W3CXmlSchema11), 0)

list.indexOf(QRegExp(".*he.*", Qt::CaseInsensitive, QRegExp::W3CXmlSchema11), 0)

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or simpler

list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), 0)

list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), 0)

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[Alex22]

Lesiok, Thanks in advance

QStringList list;
    list <<"dcsdcsdcscsc"<<"jjjjj" <<"hghghghegggg"<<"hello" << "heeeeee"<<"he" << "kreo" << "gry" << "hhh";
 
    for(int i=0; i<9; i++)
    {
       if(list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), i)-i == 0)
           qDebug() <<list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), i);
    }

QStringList list;
    list <<"dcsdcsdcscsc"<<"jjjjj" <<"hghghghegggg"<<"hello" << "heeeeee"<<"he" << "kreo" << "gry" << "hhh";

    for(int i=0; i<9; i++)
    {
       if(list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), i)-i == 0)
           qDebug() <<list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), i);
    }

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works well.

[Lesiok]

Optimal code looks like this

QStringList list;
    list <<"dcsdcsdcscsc"<<"jjjjj" <<"hghghghegggg"<<"hello" << "heeeeee"<<"he" << "kreo" << "gry" << "hhh";
 
    for(int i=0; i<list.size(); i++)
    {
         i = list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), i);
         if( i < 0 )
             break;// QStringList::indexOf returns -1 if not found
 
         qDebug() << i;
    }

QStringList list;
    list <<"dcsdcsdcscsc"<<"jjjjj" <<"hghghghegggg"<<"hello" << "heeeeee"<<"he" << "kreo" << "gry" << "hhh";

    for(int i=0; i<list.size(); i++)
    {
         i = list.indexOf(QRegExp("*he*", Qt::CaseInsensitive, QRegExp::Wildcard), i);
         if( i < 0 )
             break;// QStringList::indexOf returns -1 if not found

         qDebug() << i;
    }

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[yeye_olive]

Even more optimized code would avoid recomputing the QRegExp and list.size() on each iteration of the loop.