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From: Patrick Roemer <sangamon@netcologne.de>
Newsgroups: comp.lang.java.programmer
Subject: Re: Store Suppliers in a map
Date: Wed, 10 Apr 2019 16:35:56 +0200
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Responding to myself:
> You need a uniform key type.

Value type, of course.

> Or you could bury the whole remaining computation, starting from the
> Supplier, in a custom data type and use this as a key type.

Ditto.

Best regards,
Patrick