Here you can find the source of assertSquare(double[]... d)
public static void assertSquare(double[]... d)
//package com.java2s; /*/*from ww w . ja va 2s . c o m*/ * * * Copyright 2015 Skymind,Inc. * * * * Licensed under the Apache License, Version 2.0 (the "License"); * * you may not use this file except in compliance with the License. * * You may obtain a copy of the License at * * * * http://www.apache.org/licenses/LICENSE-2.0 * * * * Unless required by applicable law or agreed to in writing, software * * distributed under the License is distributed on an "AS IS" BASIS, * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * * See the License for the specific language governing permissions and * * limitations under the License. * * */ public class Main { public static void assertSquare(double[]... d) { if (d.length > 2) { for (int i = 0; i < d.length; i++) { assertSquare(d[i]); } } else { int firstLength = d[0].length; for (int i = 1; i < d.length; i++) { assert d[i].length == firstLength; } } } }