task 1.2-3
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@@ -4,4 +4,6 @@ import scala.collection.mutable.ArrayBuffer
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class DataBase {
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private var artists: ArrayBuffer[Artist] = new ArrayBuffer()
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def addArtist(artist: Artist): Unit = artists.addOne(artist)
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def containsArtist(artist: Artist): Boolean = artists.contains(artist)
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}
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