Miro Cupak mcupak

mcupak / filter-numbers-by-parity-with-condition-using-collectors-filtering.out

Last active November 9, 2017 02:28

	jshell> numbers.stream().collect(Collectors.groupingBy(i -> i % 2, Collectors.filtering(j -> j > 5, Collectors.counting())))
	$3 ==> {0=0, 1=3}

mcupak / filter-numbers-by-parity-with-condition.out

Last active November 9, 2017 02:28

	jshell> numbers.stream().filter(j -> j > 5).collect(Collectors.groupingBy(i -> i % 2, Collectors.counting()))
	$2 ==> {1=3}

mcupak / list-of-numbers.out

Created November 8, 2017 23:19

	jshell> List<Integer> numbers = List.of(2, 3, 4, 7, 9, 11)
	numbers ==> [2, 3, 4, 7, 9, 11]

mcupak / of-nullable-creates-empty-stream.out

Created November 7, 2017 22:18

	jshell> Stream.ofNullable(null).count()
	$4 ==> 0

mcupak / create-stream-with-of-nullable.out

Created November 7, 2017 22:17

	jshell> Stream.ofNullable(null)
	$3 ==> java.util.stream.ReferencePipeline$Head@72b6cbcc

mcupak / create-stream-of-null.out

Created November 7, 2017 22:16

	jshell> Stream.of(null)
	\| Warning:
	\| non-varargs call of varargs method with inexact argument type for last parameter;
	\| cast to java.lang.Object for a varargs call
	\| cast to java.lang.Object[] for a non-varargs call and to suppress this warning
	\| Stream.of(null)
	\| ^--^
	\| java.lang.NullPointerException thrown:
	\| at Arrays.stream (Arrays.java:5610)
	\| at Stream.of (Stream.java:1187)

mcupak / create-stream-with-of.out

Created November 7, 2017 22:15

	jshell> Stream.of(1)
	$1 ==> java.util.stream.ReferencePipeline$Head@4566e5bd

mcupak / print-even-numbers-with-iterate-in-java-9.out

Created November 7, 2017 22:14

	jshell> IntStream.iterate(0, i -> i < 10, i -> i + 2).forEach(System.out::println)
	0
	2
	4
	6
	8

mcupak / print-even-numbers-with-iterate-in-java-8.out

Created November 7, 2017 22:13

	jshell> IntStream.iterate(0, i -> i + 2).filter(j -> j < 10).forEach(System.out::println)
	0
	2
	4
	6
	8
	-2147483648
	-2147483646
	-2147483644
	-2147483642

mcupak / complete-iterate.out

Created November 7, 2017 22:11

	jshell> IntStream.iterate(
	Signatures:
	IntStream IntStream.iterate(int seed, IntUnaryOperator f)
	IntStream IntStream.iterate(int seed, IntPredicate hasNext, IntUnaryOperator next)

	<press tab again to see documentation>