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Groups > comp.lang.java.programmer > #33480

Re: Stream FlatMap

Newsgroups comp.lang.java.programmer
Date 2016-01-19 12:15 -0800
References <39a5793c-6a65-4402-9c11-69667a03f11d@googlegroups.com> <n7k3mr$6pq$1@dont-email.me> <a3a0221a-a5e6-4e0d-9018-4aa770e3eeb5@googlegroups.com>
Message-ID <a9c0a5df-cfab-4bf0-90bb-c99d9573a72c@googlegroups.com> (permalink)
Subject Re: Stream FlatMap
From Philipp Kraus <philipp.kraus.flashpixx@gmail.com>

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> Yes, that's a variant of the Rosetta solution: There solution differs from yours by having List in the signature and the instanceof check inside the flatMap. I like that better, because the signature already announces that only Lists can be flattened.

Thanks for the code excerpt. I have modified this code:
	
public static Stream<Object> flattenToStream(List<?> list) {
		return list.stream().flatMap(item ->
			item instanceof List<?> ?
			flattenToStream((List<?>)item) :
			Stream.of(item));
	}

for my system, so it works well with my term, atom structure :-)

Phil

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Thread

Stream FlatMap Philipp Kraus <philipp.kraus.flashpixx@gmail.com> - 2016-01-18 07:57 -0800
  Re: Stream FlatMap Sebastian <news@seyweiler.dyndns.org> - 2016-01-18 23:11 +0100
    Re: Stream FlatMap Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-01-18 18:18 -0500
  Re: Stream FlatMap Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-01-18 20:34 -0500
    Re: Stream FlatMap Sebastian <sebastian.millies@softwareag.com> - 2016-01-19 04:12 -0800
      Re: Stream FlatMap Philipp Kraus <philipp.kraus.flashpixx@gmail.com> - 2016-01-19 12:15 -0800
        Re: Stream FlatMap Arne Vajhøj <arne@vajhoej.dk> - 2016-01-21 10:12 -0500

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