QRegex help

Rua3n

In this example:

QStringList notFoundStrings{"0", "1"};

for (const QString &string : notFoundStrings)
{
	QString s = QString("^.*{\\s*%1\\s*,\\s*{.*$").arg(string);
	QRegularExpression regex(s);
	text.remove(regex);
}

The content of text is:

        { 0, {"test|jgg|suw|702,305,15,19|688,299,46,35|?|*0$15.Tz7zyw3r07s0z03zUPw7M1v07zkTy3tUS03k0y0Dzzrzw7y4"} },
        { 0, {"test|jgg|suw|702,305,15,19|688,299,46,35|?|*1$15.Tz7zyw3r07s0z03zUPw7M1v07zkTy3tUS03k0y0Dzzrzw7y4"} },
        { 0, {"test|jgg|suw|702,305,15,19|688,299,46,35|?|*2$15.Tz7zyw3r07s0z03zUPw7M1v07zkTy3tUS03k0y0Dzzrzw7y4"} },
           
        { 1, {"test|jgg|suw|702,305,15,19|688,299,46,35|?|*3$15.Tz7zyw3r07s0z03zUPw7M1v07zkTy3tUS03k0y0Dzzrzw7y4"} },
        { 1, {"test|jgg|suw|702,305,15,19|688,299,46,35|?|*4$15.Tz7zyw3r07s0z03zUPw7M1v07zkTy3tUS03k0y0Dzzrzw7y4"} },

        { 544, {"test|anx|fve|229,166,18,17|229,158,42,34|?|*155$18.s0zs1Us1Us1UG30o3QY7zw7zsAzs8TsMDswvww0xy0vy0zz0zzUU"} },
        { 544, {"test|exi|gpg|161,166,20,22|140,140,52,54|132,135,154,68|*142$20.s00C003U00k00A003U00800000000001000A202s003U00DU00y00Ds03zU0zy0Dzk3zw0zzU8"} },

Why is it not removing all lines starting with { 0, ... and { 1, ...?
I tested the regex here and it does work.

ChrisW67

@Rua3n
By default:

The RE dot . does not match newlines
A string containing multiple newlines is a single string to the RE

Your RE tester is feeding the lines in your test string one at a time. You are feeding the RE all the input as a single string. The RE cannot match because the first newline in the string cannot be consumed by the .*

Try:

QRegularExpression regex(s, QRegularExpression::MultilineOption);

This will not remove lines, but it will remove the text matched leaving a vestigial \n