How can I capture the part of my QString

[victor wang]

Hi All,
I'm using qt5.5 on my computer and Linux+QT for my OS system.
I've got a string like this.

TWO.M TRS-M28\n

And I just need TWO.M TRS-M28 .
I've seen the QString document.
I don't see any function that have this ability to do it.
How can I solve this problem?
Or any advise?
Thanks in Advanced!

[SGaist]

Hi,

If you just want to drop the last character: QString::chop

[VRonin]

http://doc.qt.io/qt-5/qstring.html#trimmed

[victor wang]

@SGaist
Can't I do like this?

scan_info = scan_info.mid(19).chop(1);

I will get error when I compile.

[mrjj]

@victor-wang
Hi

QString str = " lots\t of\nwhitespace\r\n ";
str = str.trimmed();
// str == "lots\t of\nwhitespace"
or
scan_info = scan_info.chop(1);

[victor wang]

@VRonin
I can do it with this one!

scan_info =scan_info.mid(19).trimmed();

Thanks

[J.Hilk]

@victor-wang
alternatively:

QString s("TWO.M TRS-M28\n");
QString removeMe("\n");
if(s.endsWith(removeMe))
    s.remove(s.length()-removeMe.length(), removeMe.length());

[SGaist]

If you'd read the documentation of the chop method which also has an example, you would have seen that it modifies the string in-place.

By the way, where's that scan_info.mid(19) coming from ?