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Java Introduction to Functional Programming Reduction and Aggregation Reduce Housing Records

Abby Schoeller
PLUS
Abby Schoeller
Courses Plus Student 6,187 Points

No suitable method found...

What do I put inside of the Comparator to find the minimum. I already have a stream of integers.

public static OptionalInt getLowestHomeValueIndexDeclaratively(List<HousingRecord> records) { // TODO: Create a stream off the records // TODO: Map the stream to an IntStream on HousingRecord.getCurrentHomeValueIndex to expose new methods // TODO: Return the minimum value from the stream. It should be an optional because records could be empty.

System.out.println( records.stream() .map(HousingRecord:: getCurrentHomeValueIndex) .min(Comparator.comparing()) ); }

Am I trying to compare too many integers in one statement? i keep getting this error

no suitable method found for comparing(no arguments) method Comparator.<T#1,U#1>comparing(Function<? super T#1,? extends U#1>,Comparator<? super U#1>) is not applicable (cannot infer type-variable(s) T#1,U#1 (actual and formal argument lists differ in length)) method Comparator.<T#2,U#2>comparing(Function<? super T#2,? extends U#2>) is not applicable (cannot infer type-variable(s) T#2,U#2 (actual and formal argument lists differ in length)) where T#1,U#1,T#2,U#2 are type-variables: T#1 extends Object declared in method <T#1,U#1>comparing(Function<? super T#1,? extends U#1>,Comparator<? super U#1>) U#1 extends Object declared in method <T#1,U#1>comparing(Function<? super T#1,? extends U#1>,Comparator<? super U#1>) T#2 extends Object declared in method <T#2,U#2>comparing(Function<? super T#2,? extends U#2>) U#2 extends Comparable<? super U#2> declared in method <T#2,U#2>comparing(Function<? super T#2,? extends U#2>)