sarah jones schreef op 4-4-2014 15:16:
Hi
I have tried this regular expression -
QRegularExpression expression("^[cfmt]_\\d\\d\\d\\d\\d\\d\\.rcd$");
if (expression.match(receivedFilename).hasMatch());
this finds a match for m_000006.rcd
but unfortunately it also matches m_0000006.rcd
and I cannot figure out why
I have tried this in some of the online regular expression tools and
it seems to work there
What have I got wrong?
A dot is not treated as a literal character . but as an operator.
http://www.regular-expressions.info/dot.html
For readabiliy, I'd not use \\d 6 times, but simply use [\\d]{6} instead.
André
Thanks
Sarah
> Date: Fri, 4 Apr 2014 13:58:10 +0200
> From: an...@familiesomers.nl
> To: interest@qt-project.org
> Subject: Re: [Interest] format of QString
>
> R. Reucher schreef op 4-4-2014 13:47:
> > A slight modification to your proposed reg-exp:
> >
> > QRegExp regExp("(m|c)_([0-9]{6})\\.rcp");
>
> For new (Qt 5) code, I really recommend using QRegularExpression
instead
> of QRegExp where possible.
>
> André
>
> >
> > Regards, René
> >
> > On Friday 04 April 2014 13:25:36 Etienne Sandré-Chardonnal wrote:
> >> Hi sarah,
> >>
> >> This is untested but should work:
> >>
> >> QRegExp regExp("(m|c)_([0-9]{6}).rcp");
> >> if(regExp.exactMatch(fileName))
> >> {
> >> //Here we know that filename matches the pattern
> >> QString letter = regExp.cap(1); //Will be "m" or "c"
> >> QString number = regExp.cap(2); //Will contain the six digits as a
> >> string
> >> }
> >>
> >>
> >> Regular expressions are a vast topic, you will find a lot of
documentation
> >> by googling it.
> >>
> >>
> >> Etienne
> >>
> >> 2014-04-04 13:01 GMT+02:00 André Somers <an...@familiesomers.nl>:
> >>> sarah jones schreef op 4-4-2014 12:47:
> >>> Hi
> >>> How would you advise that I ensure a QString object is of a
given format.
> >>> In particular I want to check that a QString conforms to the
following
> >>> m_ or c_
> >>> followed by 6 digits (0-9)
> >>> followed by ".rcd"
> >>>
> >>> so m_000001.rcd matches as does c_000003.rcd
> >>> but not m_aa00002.rcd
> >>> etc
> >>>
> >>> A regular expression sounds like the right tool for that. See
> >>> QRegularExpression (Qt5) or QRegExp (Qt4).
> >>>
> >>> André
> >>>
> >>>
> >>> _______________________________________________
> >>> Interest mailing list
> >>> Interest@qt-project.org
> >>> http://lists.qt-project.org/mailman/listinfo/interest
> > _______________________________________________
> > Interest mailing list
> > Interest@qt-project.org
> > http://lists.qt-project.org/mailman/listinfo/interest
>
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