# Logstash array how to and filter **URL:** https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054 **Category:** Logstash **Created:** [February 23, 2022, 3:26pm UTC](https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054 "2022-02-23T15:26:38Z") **Posts on this page:** 6 **Page:** 1
### Author: ![melorium](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/melorium/32/100710_2.png) [@melorium](https://discuss.elastic.co/u/melorium) #### Post date: [February 23, 2022, 3:26pm UTC](https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054/1 "2022-02-23T15:26:39Z")
![Skärmavbild 2022-02-23 kl. 16.21.24](https://us1.discourse-cdn.com/elastic/original/3X/2/e/2e0d29e39ff21d5fad4e1b4f735c93f3da15a153.png) Hi. I have a list of user name's with user ID 1-100 each user id case a name that contains to it. Exmaple 01 "user 1" 02 "user2" etc. I my log events I have user id known but not user name. How can I match user id with a list of 100 names? csv file look like this 1 , user 1 2, user 2 3, user 3 etc etc. So let say I have user id 63 and I want to match it from that list. Can I use an array or match hasch? I can use 100 if but I dont want that. Thanks a lot for you help. Dennis ---
### Author: ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger) #### Post date: [February 23, 2022, 3:28pm UTC](https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054/2 "2022-02-23T15:28:25Z")
A [translate](https://www.elastic.co/guide/en/logstash/current/plugins-filters-translate.html) filter might work. ---
### Author: ![melorium](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/melorium/32/100710_2.png) [@melorium](https://discuss.elastic.co/u/melorium) #### Post date: [February 23, 2022, 3:58pm UTC](https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054/3 "2022-02-23T15:58:12Z")
Du you have an example? All log events I have user ID and I have a CSV file as I told you. So I want to compare that id to a list from a CSV and add a field with user name. ![Skärmavbild 2022-02-23 kl. 16.57.58](https://us1.discourse-cdn.com/elastic/original/3X/d/f/dfdf480861a8e4b3ab125ccc643c6924cee2badb.png) ---
### Author: ![melorium](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/melorium/32/100710_2.png) [@melorium](https://discuss.elastic.co/u/melorium) #### Post date: [February 23, 2022, 4:01pm UTC](https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054/4 "2022-02-23T16:01:44Z")
csv look like this user id, unername 01, [example@domian.com](mailto:example@domian.com) 02 [example2@domain.com](mailto:example2@domain.com) etc up to over 1000 ---
### Author: ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger) #### Post date: [February 23, 2022, 4:11pm UTC](https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054/5 "2022-02-23T16:11:26Z")
> [@melorium](#): > > Du you have an example? See [this](https://discuss.elastic.co/t/compare-a-field-with-a-csv-file-and-add-info-from-csv-in-a-new-field/191973/2) thread. ---
### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system) #### Post date: [March 23, 2022, 4:11pm UTC](https://discuss.elastic.co/t/logstash-array-how-to-and-filter/298054/6 "2022-03-23T16:11:38Z")
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