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authoredMay 11, 2018
Merge pull request #1 from bradfordlynch/patch-2
Updated page metadata to include in tour
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‎_tour/abstract-types.md

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discourse: true
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tutorial: scala-tour
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categories: tour
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partof: scala-tour
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num: 23
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next-page: compound-types
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previous-page: inner-classes
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topics: abstract types
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prerequisite-knowledge: variance, upper-type-bound
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redirect_from: "/tutorials/tour/abstract-types.html"
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Traits and abstract classes can have an abstract type member. This means that the concrete implementations define the actual type. Here's an example:

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