src/main/java/org/apache/sysds/runtime/compress/utils/Util.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.sysds.runtime.compress.utils;

public class Util {
	public static int[] join(int[] lhs, int[] rhs) {
		int[] joined = new int[lhs.length + rhs.length];
		int lp = 0;
		int rp = 0;
		int i = 0;
		for(; i < joined.length && lp < lhs.length && rp < rhs.length; i++) {
			if(lhs[lp] < rhs[rp]) 
				joined[i] = lhs[lp++];
			else 
				joined[i] = rhs[rp++];
		}

		while(lp < lhs.length) 
			joined[i++] = lhs[lp++];
		
		while(rp < rhs.length) 
			joined[i++] = rhs[rp++];
		
		return joined;
	}
}