| // SPDX-FileCopyrightText: The Eigen Authors |
| // SPDX-License-Identifier: MPL-2.0 |
| |
| 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; |
