[Qt-interest] how to shift the content in a line

[Oliver.Knoll at comit.ch]

Knoll Oliver, ITS-CMT-SUI-SL-PDC-FIN-DEV wrote on Wednesday, February 11, 2009 1:53 PM:

> Ravi_Kalepalli wrote on Wednesday, February 11, 2009 5:24 AM:
> 
>> ...
>> Now I have to append a string at the middle (LINE No 4), how to shift
>> the 1 and add the string.
> 
> 1. newText = Parse the text file (=read) until you hit the place
>...
> 5. end :)

To make more use of Qt you could also do:

QFile file("password.txt");
QString text = file.readAll();
int position = ...; // find the position at which you want to insert the new text
                          // e.g. using a QRegExp or whatever
text.insert(position, newText);
// now overwrite the content of file with 'text', using a QTextStream etc.
...

Not the most performant (and resource-friendly) solution, but assuming that you don't need to parse MBytes of text (but rather of the kind you have shown in your first post) it should be sufficient - and easy to understand, and it let's Qt handle the "hard stuff" (I always say: "Let other people to the hard work" ;)

Cheers, Oliver
-- 
Oliver Knoll
Dipl. Informatik-Ing. ETH
COMIT AG - ++41 79 520 95 22