Having a brain cramp on a regex

[Spockmeat]

I should probably just go home and get some sleep, but for the life of me I can't figure out why this regular expression isn't working.

Basically, what I want to do is take a list of strings and search through it looking for any string where any word in the string starts with the filter text. I thought I was pretty sure I have the regex correct, but no matter what I do I can't get it to work properly.


Here's my little filter function:

void MyDialog::filter(QString filterText)
{
   // clear out the gui list
   ui.stringList->clear(); // a combo box on my form holding a list of strings
   // set up the regular expression
   QRegExp regexp(QString("^.*\\b%1.*$").arg(filterText),Qt::CaseInsensitive,QRegExp::Wildcard);
   // strings is just a QStringList defined elsewhere
   ui.stringList->addItems(strings.filter(regexp));
}

void MyDialog::filter(QString filterText)
{
   // clear out the gui list
   ui.stringList->clear(); // a combo box on my form holding a list of strings
   // set up the regular expression
   QRegExp regexp(QString("^.*\\b%1.*$").arg(filterText),Qt::CaseInsensitive,QRegExp::Wildcard);
   // strings is just a QStringList defined elsewhere
   ui.stringList->addItems(strings.filter(regexp));
}

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Now, if I make the QRegExp look like:

QRegExp regexp(QString("%1").arg(filterText),Qt::CaseInsensitive,QRegExp::Wildcard);

QRegExp regexp(QString("%1").arg(filterText),Qt::CaseInsensitive,QRegExp::Wildcard);

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It works just like I expect, filling the gui box with a list with lines from the full list where the filter text appears anywhere in any word from that string.

Admittedly, my knowledge on regular expressions is a bit rusty, but and maybe I'm just not forming the regular expression correctly, but I've been searching google for a while trying to remember this stuff and if I have something wrong I just can't see it.

I mean, even doing something simple like QString("^%1").arg(filterText) doesn't work. So I'm at a bit of a loss.

[jacek]

QRegExp regexp(QString("%1").arg(filterText),Qt::CaseInsen sitive,QRegExp::Wildcard);

The last parameter tells Qt to interpret your expression as a wildcard, not a regular expression. Either change it to QRegExp::RegExp or drop it.

[Spockmeat]

Wow, I feel dumb now

Thanks for that tip, works fine now.