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- Matrix3i m = Matrix3i::Random();
- cout << "Here is the initial matrix m:" << endl << m << endl;
- int i = -1;
- for(auto c: m.colwise()) {
- c *= i;
- ++i;
- }
- cout << "Here is the matrix m after the for-range-loop:" << endl << m << endl;
- auto cols = m.colwise();
- auto it = std::find_if(cols.cbegin(), cols.cend(),
- [](Matrix3i::ConstColXpr x) { return x.squaredNorm() == 0; });
- cout << "The first empty column is: " << distance(cols.cbegin(),it) << endl;
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