转换不可变为可变集合

Question

将collection.immutable.Set转换为collection.mutable.Set的最佳方法是什么？

Answer 1

scala> var a=collection.mutable.Set[Int](1,2,3)        
a: scala.collection.mutable.Set[Int] = Set(1, 2, 3) 

scala> var b=collection.immutable.Set[Int](1,2,3) 
b: scala.collection.immutable.Set[Int] = Set(1, 2, 3) 

scala> collection.mutable.Set(b.toArray:_*)  
res0: scala.collection.mutable.Set[Int] = Set(1, 2, 3) 

scala> collection.mutable.Set(b.toSeq:_*) 
res1: scala.collection.mutable.Set[Int] = Set(1, 2, 3) 

scala> collection.mutable.Set(b.toList:_*) 
res2: scala.collection.mutable.Set[Int] = Set(1, 2, 3)