Advertisement banners are displayed to users in a mobile application (app_id) in a country (country code) from an advertiser (advertiser_id).
When this happens, an impression event is recorded and stored. Optionally, if the user clicks on the banner, a click event is recorded.
Alex Nastetsky alexnastetsky
alexnastetsky
/ README.md
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February 14, 2022 21:12
alexnastetsky
/ ElementWithCount.scala
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November 18, 2015 13:48
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| import org.apache.spark.sql.types.SQLUserDefinedType | |
| @SQLUserDefinedType(udt = classOf[ElementWithCountUDT]) | |
| case class ElementWithCount(element:String, count:Int) extends Serializable { | |
| override def toString: String = { | |
| Seq( | |
| element, | |
| count |