damondouglas commented on a change in pull request #12448: URL: https://github.com/apache/beam/pull/12448#discussion_r466143420
########## File path: learning/katas/go/core_transforms/windowing/additional_parameters/task.md ########## @@ -0,0 +1,77 @@ +<!-- + ~ 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. + --> + +# Windowing + +This lesson introduces the concept of windowed PCollection elements. A window is a view into a fixed beginning and +fixed end to a set of data. In the beam model, windowing subdivides a PCollection according to the +timestamps of its individual elements. + +Beam can pass information about the window and timestamp to your elements in your DoFn. All your previous +lessons' DoFn had this information available, yet you never made use of it in your DoFn parameters. In this +lesson you will. The simple toy dataset has five git commit messages and their timestamps Review comment: I like the idea of more windowing lessons after the rest of the originally planned katas are complete. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
