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https://issues.apache.org/jira/browse/BEAM-9679?focusedWorklogId=441295&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-441295
]
ASF GitHub Bot logged work on BEAM-9679:
----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Jun/20 14:30
Start Date: 04/Jun/20 14:30
Worklog Time Spent: 10m
Work Description: damondouglas commented on a change in pull request
#11883:
URL: https://github.com/apache/beam/pull/11883#discussion_r435303784
##########
File path: learning/katas/go/Core Transforms/Combine/CombineFn/pkg/task/task.go
##########
@@ -0,0 +1,55 @@
+// 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 task
+
+import (
+ "github.com/apache/beam/sdks/go/pkg/beam"
+)
+
+func ApplyTransform(s beam.Scope, input beam.PCollection) beam.PCollection {
+ return beam.Combine(s, &averageFn{}, input)
+}
+
+type averageAccum struct {
+ Count int64
+ Sum float64
+}
+
+type averageFn struct{}
+
+func (c *averageFn) CreateAccumulator() averageAccum {
Review comment:
Apologies, I couldn't find any. I looked into the code for
[stats.Mean](https://github.com/apache/beam/blob/master/sdks/go/pkg/beam/transforms/stats/mean.go#L34)
for how this is implemented and tailored this for the katas.
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Issue Time Tracking
-------------------
Worklog Id: (was: 441295)
Time Spent: 7.5h (was: 7h 20m)
> Core Transforms | Go SDK Code Katas
> -----------------------------------
>
> Key: BEAM-9679
> URL: https://issues.apache.org/jira/browse/BEAM-9679
> Project: Beam
> Issue Type: Sub-task
> Components: katas, sdk-go
> Reporter: Damon Douglas
> Assignee: Damon Douglas
> Priority: P2
> Time Spent: 7.5h
> Remaining Estimate: 0h
>
> A kata devoted to core beam transforms patterns after
> [https://github.com/apache/beam/tree/master/learning/katas/java/Core%20Transforms]
> where the take away is an individual's ability to master the following using
> an Apache Beam pipeline using the Golang SDK.
>
> ||Transform||Pull Request||Status||
> |Map|[11564|https://github.com/apache/beam/pull/11564]|Closed|
> |GroupByKey|[11734|https://github.com/apache/beam/pull/11734]|Closed|
> |CoGroupByKey|[11803|https://github.com/apache/beam/pull/11803]|Closed|
> |Combine Simple
> Function|[11866|https://github.com/apache/beam/pull/11866]|Closed|
> |CombineFn|[11883|https://github.com/apache/beam/pull/11883]|Open|
> |Flatten|[11806|https://github.com/apache/beam/pull/11806]|Closed|
> |Partition| | |
> |Side Input| | |
> |Side Output| | |
> |Branching| | |
> |Composite Transform| | |
> |DoFn Additional Parameters| | |
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