Skip to content

D Distinct.md

Latest commit

 

History

History
60 lines (46 loc) · 1.68 KB

D Distinct.md

File metadata and controls

60 lines (46 loc) · 1.68 KB

Data Set

   List<Footballer> getFootballers() {
        return List.of(
                new Footballer("Messi", 32, Gender.MALE, List.of("CF","CAM", "RF")),
                new Footballer("Ibrahim", 28, Gender.MALE, List.of("CF", "CAM", "LF")),
                new Footballer("Arthur", 23, Gender.MALE, List.of("CM", "CAM")),
                new Footballer("Cristiano Ronaldo", 27, Gender.MALE, List.of("GK")),
                new Footballer("Surinder", 20, Gender.MALE, List.of("CM", "CDM")),
                new Footballer("Jennifer", 29, Gender.FEMALE, List.of("CF", "CAM")),
                new Footballer("Jana", 17, Gender.FEMALE, List.of("CB")),
                new Footballer("Alexia", 25, Gender.FEMALE, List.of("CAM", "RF", "LF"))
        );
    }

Distinct:

Returns distinct elements in the stream, eliminating duplicates. It uses the equals() method of the elements to decide whether two elements are equal or not.

Example: Find all unique positions of male footballers less than 30 years old.

        String allUniquePositionsOfMaleLessThan30y = footballerList.stream()
        .filter(footballer -> footballer.getGender().equals(Gender.MALE))
        .filter(footballer -> footballer.getAge() < 30)
        .map(Footballer::getPositions)
        .flatMap(Collection::stream)
        .distinct()
        .collect(Collectors.joining(","));

Output:

allUniquePositionsOfMaleLessThan30y = CF,CAM,LF,CM,GK,CDM

← Previous: C Flat Map

Next: E Sorted →
[Sorted](./E_Sorted.md) ->