Set, the card game: Difference between revisions
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two solid green ovals
two striped green ovals
</pre>
=={{header|Java}}==
<syntaxhighlight lang="java">
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
public final class SetTheCardGame {
public static void main(String[] args) {
List<Card> pack = createPackOfCards();
for ( int cardCount : List.of( 4, 8, 12 ) ) {
Collections.shuffle(pack);
List<Card> deal = pack.subList(0, cardCount);
System.out.println("Cards dealt: " + cardCount);
for ( Card card : deal ) {
System.out.println(card);
}
System.out.println();
System.out.println("Sets found: ");
for ( List<Card> combination : combinations(deal, 3) ) {
if ( isGameSet(combination) ) {
for ( Card card : combination ) {
System.out.print(card + " ");
}
System.out.println();
}
}
System.out.println("-------------------------" + System.lineSeparator());
}
}
private static interface Feature {}
private static enum Number implements Feature { ONE, TWO, THREE }
private static enum Colour implements Feature { GREEN, RED, PURPLE }
private static enum Shading implements Feature { OPEN, SOLID, STRIPED }
private static enum Shape implements Feature { DIAMOND, OVAL, SQUIGGLE }
private static record Card(Number number, Colour colour, Shading shading, Shape shape) {
public String toString() {
return "[" + number + " " + colour + " " + shading + " " + shape + "]";
}
}
private static List<Card> createPackOfCards() {
List<Card> pack = new ArrayList<Card>();
for ( Number number : Number.values() ) {
for ( Colour colour : Colour.values() ) {
for ( Shading shading : Shading.values() ) {
for ( Shape shape : Shape.values() ) {
pack.add( new Card(number, colour, shading, shape) );
}
}
}
}
return pack;
}
private static boolean isGameSet(List<Card> triple) {
return allSameOrAllDifferent(triple.stream().map( c -> (Feature) c.number ).toList()) &&
allSameOrAllDifferent(triple.stream().map( c -> (Feature) c.colour ).toList()) &&
allSameOrAllDifferent(triple.stream().map( c -> (Feature) c.shading ).toList()) &&
allSameOrAllDifferent(triple.stream().map( c -> (Feature) c.shape ).toList());
}
private static boolean allSameOrAllDifferent(List<Feature> features) {
Set<Feature> featureSet = new HashSet<Feature>(features);
return featureSet.size() == 1 || featureSet.size() == 3;
}
private static <T> List<List<T>> combinations(List<T> list, int r) {
List<List<T>> combinations = new ArrayList<List<T>>();
List<Integer> combination = IntStream.range(0, r).boxed().collect(Collectors.toList());
while ( combination.get(r - 1) < list.size() ) {
combinations.add(combination.stream().map( i -> list.get(i) ).toList());
int t = r - 1;
while ( t != 0 && combination.get(t) == list.size() - r + t ) {
t--;
}
combination.set(t, combination.get(t) + 1);
for ( int i = t + 1; i < r; i++ ) {
combination.set(i, combination.get(i - 1) + 1);
}
}
return combinations;
}
}
</syntaxhighlight>
{{ out }}
<pre>
Cards dealt: 4
[TWO RED OPEN SQUIGGLE]
[THREE PURPLE OPEN DIAMOND]
[TWO PURPLE STRIPED DIAMOND]
[THREE RED STRIPED DIAMOND]
Sets found:
-------------------------
Cards dealt: 8
[ONE RED STRIPED SQUIGGLE]
[TWO RED SOLID OVAL]
[ONE PURPLE STRIPED OVAL]
[TWO GREEN OPEN SQUIGGLE]
[TWO GREEN STRIPED DIAMOND]
[THREE GREEN OPEN OVAL]
[TWO RED OPEN SQUIGGLE]
[ONE PURPLE SOLID SQUIGGLE]
Sets found:
[TWO RED SOLID OVAL] [ONE PURPLE STRIPED OVAL] [THREE GREEN OPEN OVAL]
-------------------------
Cards dealt: 12
[TWO PURPLE SOLID SQUIGGLE]
[TWO GREEN SOLID SQUIGGLE]
[THREE PURPLE OPEN DIAMOND]
[ONE RED SOLID DIAMOND]
[ONE PURPLE STRIPED OVAL]
[ONE PURPLE OPEN SQUIGGLE]
[TWO RED OPEN DIAMOND]
[THREE RED SOLID OVAL]
[THREE PURPLE SOLID SQUIGGLE]
[ONE GREEN STRIPED OVAL]
[ONE RED OPEN SQUIGGLE]
[ONE PURPLE OPEN OVAL]
Sets found:
[TWO PURPLE SOLID SQUIGGLE] [THREE PURPLE OPEN DIAMOND] [ONE PURPLE STRIPED OVAL]
[ONE RED SOLID DIAMOND] [ONE PURPLE OPEN SQUIGGLE] [ONE GREEN STRIPED OVAL]
[TWO RED OPEN DIAMOND] [THREE PURPLE SOLID SQUIGGLE] [ONE GREEN STRIPED OVAL]
-----------------------
</pre>
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