implement intersection semigroup

toxyduck · toxyduck · commit b710672ec458 · 2019-10-20T20:02:16.000+03:00
diff --git a/core/src/main/java/fj/Semigroup.java b/core/src/main/java/fj/Semigroup.java
@@ -629,4 +629,8 @@ public static <A> Semigroup<Set<A>> setSemigroup() {
     return semigroupDef(Set::union);
   }
 
+  public static <A> Semigroup<Set<A>> setIntersectionSemigroup() {
+    return semigroupDef(Set::intersect);
+  }
+
 }

Original file line number	Diff line number	Diff line change
`@@ -629,4 +629,8 @@ public static <A> Semigroup<Set<A>> setSemigroup() {`
`629`	`629`	`return semigroupDef(Set::union);`
`630`	`630`	`}`
`631`	`631`
	`632`	`+ public static <A> Semigroup<Set<A>> setIntersectionSemigroup() {`
	`633`	`+ return semigroupDef(Set::intersect);`
	`634`	`+ }`
	`635`	`+`
`632`	`636`	`}`