Remove parentheses in QString

Question

I have a QString containing "(M001)" and I want to remove the parentheses in text. The result should be "M001". How should I use a QRegExp for this?

Answer 1

If you know your string always has parenthesis, you could just do something like:

str = str.mid(1); // Remove first character
str.chop(1);      // Remove last character

Otherwise you could also do this instead of using a regular expression:

if (str.startsWith('(') && str.endsWith(')')) {
    str = str.mid(1); // Remove first character
    str.chop(1);      // Remove last character
}

But if you insist using a QRegExp, try this:

str.remove(QRegExp("^\\(|\\)$"));

or this:

str.replace(QRegExp("^\\((.*)\\)$"), "\\1");

EDIT: If you want to remove ALL parenthesis from the string you can try:

str.remove('(').remove(')');

or

str.remove(QRegExp("[()]"));

Answer 2

I see two possible way to do it:

1.Using QString::remove() like this:

str.remove("(");
str.remove(")");

2.Using QRegExp class like this:

str.remove(QRegExp("[()]"));

In both of variants I get "M001" string. Of course, there are some restrictions: all parentheses will be removed.But seems like it's what you want, don't you?