uh

stage.js

@@ -1,4 +1,3 @@
-
 /**
  * An async collection / item stream.
  * @param {Array} from Optional array to begin reading from.
@@ -25,6 +24,12 @@ function Stage(from) {
 	}
     };
 
+    /**
+     * Returns true if there are any values left in the stream, or if the stream is still open.
+     */
+    this.hasValues = () => {
+	return !(base.over && base.array.length==0);
+    };
     /**
      * Take one item off then end. Function will yield if none available to produce yet.
      * @return {} undefined if there is no more items to produce (`commit` was called), otherwise the next item in the stream.