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Re: XML

Path csiph.com!aioe.org!.POSTED!not-for-mail
From Arne Vajhøj <arne@vajhoej.dk>
Newsgroups comp.lang.java.programmer
Subject Re: XML
Date Tue, 16 Aug 2016 21:37:02 -0400
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Xref csiph.com comp.lang.java.programmer:35370

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On 8/16/2016 5:04 PM, Arne Vajhøj wrote:
> Note that you can convert data to a TreeMap using streams
> and lambdas if you really need fast lookup by key.

Demo (well - it is converting to HashMap I think):

Previous code:

// search
Data o1 = data2.getList().stream().filter(item -> item.getIv() == 
456).findFirst().get();
Data o2 = data2.getList().stream().filter(item -> item instanceof DataA 
&& ((DataA)item).getSv().equals("ABC")).findFirst().get();

Map code:

// search
Map<Integer, Data> lookupByIv = 
data2.getList().stream().collect(Collectors.toMap(item -> item.getIv(), 
item -> item));
Map<String, Data> lookupBySv = data2.getList().stream().filter(item -> 
item instanceof DataA).map(item -> 
(DataA)item).collect(Collectors.toMap(item -> item.getSv(), item -> item));
Data o1 = lookupByIv.get(456);
Data o2 = lookupBySv.get("ABC");

Arne

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Thread

XML Eric Douglas <e.d.programmer@gmail.com> - 2016-07-29 13:25 -0700
  Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-07-29 19:46 -0400
  Re: XML Roedy Green <inquiry@mindprod.com> - 2016-07-30 17:09 -0700
    Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-07-30 21:49 -0400
      Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-07-30 22:35 -0400
      Re: XML Roedy Green <inquiry@mindprod.com> - 2016-07-31 21:39 -0700
        Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-01 05:19 -0700
          Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-01 08:51 -0400
            Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-05 06:07 -0700
              Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-05 10:17 -0700
              Re: XML Stanimir Stamenkov <s7an10@netscape.net> - 2016-08-07 19:04 +0300
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-08 05:38 -0700
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-08 07:19 -0700
                Re: XML Stanimir Stamenkov <s7an10@netscape.net> - 2016-08-09 23:57 +0300
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-10 05:37 -0700
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-10 10:39 -0700
                Re: XML Stanimir Stamenkov <s7an10@netscape.net> - 2016-08-10 22:05 +0300
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-10 13:29 -0700
                Re: XML Stanimir Stamenkov <s7an10@netscape.net> - 2016-08-11 02:18 +0300
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-11 05:15 -0700
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-11 05:50 -0700
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-11 12:24 -0700
                Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-13 15:38 -0400
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-16 11:49 -0700
                Re: XML Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-08-16 15:57 -0400
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-16 13:20 -0700
                Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-16 17:04 -0400
                Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-16 21:37 -0400
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-17 05:22 -0700
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-17 05:21 -0700
                Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-16 16:13 -0400
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-16 13:22 -0700
                Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-16 16:53 -0400
                Re: XML Eric Douglas <e.d.programmer@gmail.com> - 2016-08-16 13:32 -0700
                Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-16 16:47 -0400
                Re: XML Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-08-16 16:59 -0400
        Re: XML Arne Vajhøj <arne@vajhoej.dk> - 2016-08-01 08:46 -0400

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