byte vec & bit vec (bit set)

src/main/kotlin/blitz/collections/IterUtils.kt

@@ -0,0 +1,10 @@
+package blitz.collections
+
+fun <T, R> Iterator<T>.mapModifier(fn: (T) -> R): Iterator<R> =
+    object : Iterator<R> {
+        override fun next(): R =
+            fn(this@mapModifier.next())
+
+        override fun hasNext(): Boolean =
+            this@mapModifier.hasNext()
+    }