Generator (computer programming): Difference between revisions

Revision as of 04:09, 25 February 2023

Revision as of 04:48, 25 February 2023

Line 352:

<syntaxhighlight lang="java">

Iterable<Integer> myIterable = Stream

record Pair(int a, int b) {};

// Generates Fib sequence

.iterate(new Integer[]{ 1, 1 }, x -> new Integer[] { x[1], x[0] + x[1] })

Iterable<Integer> myIterable = Stream.iterate(new Pair(1, 1), p -> new Pair(p.b, p.a + p.b))

.map(x -> x[0])::iterator;

.limit(10)

.map(xp -> x[0]p.a)::iterator;

myIterable.forEach(System.out::println);

</syntaxhighlight>

Or get an Iterator from the '''Java 8''' super-interface BaseStream of Stream interface.

<syntaxhighlight lang="java">

record Pair(int a, int b) {};

// Save the iterator of a stream that generates fib sequence

Iterator<Integer> myGenerator = Stream

// Generates Fib sequence

.iterate(new Integer[]{ Pair(1, 1 }), xp -> new Integer[] { x[1]Pair(p.b, x[0]p.a + x[1] }p.b))

.map(xp -> x[0]p.a).iterator();

// Print the first 5 elements