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Groups > comp.lang.java.programmer > #35521

Re: ArrayList vs HashMap

From Andreas Leitgeb <avl@logic.at>
Newsgroups comp.lang.java.programmer
Subject Re: ArrayList vs HashMap
Date 2016-08-31 12:55 +0000
Organization A noiseless patient Spider
Message-ID <slrnnsdktf.456.avl@login.logic.tuwien.ac.at> (permalink)
References <ps7urbhve2c7lfn0f3nop1p0hkgjsgdaid@4ax.com> <q08urbp60906u39su1o8feo0i3unlcednp@4ax.com> <136a0364-6810-45b3-9dc0-7a0ac235fef5@googlegroups.com> <2v5csb5sbcsmc8mhl568kddioqa8cntdng@4ax.com> <ArrayList-20160831004938@ram.dialup.fu-berlin.de>

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Stefan Ram <ram@zedat.fu-berlin.de> wrote:
>   A HashSet, on the other hand, has a nicer interface for
>   programmers, so one should write an »ArraySet implements Set«
>   wrapper for ArrayLists (unless such a thing should already exist).

Unless I missed something, the interface Set doesn't add any method,
that isn't already in Collection.

If it weren't for Set's specific semantics of add(o) where o was
already contained, then ArrayList would "already be a Set".

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Thread

ArrayList vs HashMap Roedy Green <inquiry@mindprod.com> - 2016-08-25 09:42 -0700
  Re: ArrayList vs HashMap Roedy Green <inquiry@mindprod.com> - 2016-08-25 09:43 -0700
    Re: ArrayList vs HashMap Eric Douglas <e.d.programmer@gmail.com> - 2016-08-25 10:06 -0700
      Re: ArrayList vs HashMap Roedy Green <inquiry@mindprod.com> - 2016-08-30 16:34 -0700
        Re: ArrayList vs HashMap Andreas Leitgeb <avl@logic.at> - 2016-08-31 12:55 +0000
          Re: ArrayList vs HashMap Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-08-31 13:05 -0400
            Re: ArrayList vs HashMap Andreas Leitgeb <avl@logic.at> - 2016-08-31 17:34 +0000
  Re: ArrayList vs HashMap j4n bur53 <janburse@fastmail.fm> - 2016-08-31 09:15 +0200

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