QRegExp replace every second character with a whitespace (blank)?

[Opa114]

Hi there,

i want to insert a whitespace (blank) after every second character in a QString.
Years ago in Java i did it this way: String.replaceAll("(.{2})(?!$)", "$1 ")

Now i tried to transfer it to Qt and tried it thsi way:

QString myString = some Data.
myString.replace(QRegExp("(.{2})(?!$)"), "$1 ");

But it did not replace it correctly. For example the input is something like this: 34C9FG63R2DE9H88Z and the output should be 34 C9 FG 63 R2 DE 9H 88 Z
but with my soluton above i got: $1 $1 $1 $1 $1 $1 $1 $1 Z".

So where is the problem? I think Qt handles the replace in another way like Java.
thanks!

[VRonin]

If you are using Qt5 then use QRegularExpression instead of QRegExp

instead of $1 you should use \1 (escaped so \\1)

otherwise, more straightforward, you can use:

    const int everyOther = 2;
    for(int i=everyOther;i<testStr.size();i+=everyOther+1)
            testStr.insert(i,' ');

[Opa114]

ah thanks - using \\1 instead of $1 works as i want it.

And thanks for the other solution with the For-Loop.