| /* |
| * 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. |
| */ |
| |
| /** |
| * Return the first num lines of an array. |
| * @param lines An array of strings. |
| * @param num Number of lines to return. |
| */ |
| function main(msg) { |
| var lines = msg.lines || []; |
| var num = msg.num || 1; |
| var head = lines.slice(0, num); |
| console.log('head get first ' + num + ' lines of ' + lines + ': ' + head); |
| return {lines: head, num: num}; |
| } |