simplified private list.range() method

HISTORY.md

@@ -9,6 +9,9 @@
 * **Documentation Updates:**
     * updated manual (e.g. p.20) with hyper-semantics of ITEM OF, thanks Brian 
 
+### 2021-02-06
+* simplified private list.range() method
+
 ### 2021-02-05
 * new manual for v6.6, thanks, Brian!
 * objects: don't show internal "compile" reporter in search results

snap.html

@@ -13,7 +13,7 @@
         <script src="src/objects.js?version=2021-01-30"></script>
         <script src="src/gui.js?version=2021-02-04"></script>
         <script src="src/paint.js?version=2020-05-17"></script>
-        <script src="src/lists.js?version=2021-02-04"></script>
+        <script src="src/lists.js?version=2021-02-07"></script>
         <script src="src/byob.js?version=2020-12-22"></script>
         <script src="src/tables.js?version=2020-10-06"></script>
         <script src="src/sketch.js?version=2020-07-13"></script>

src/lists.js

@@ -63,7 +63,7 @@ MorphicPreferences, TableDialogMorph, SpriteBubbleMorph, SpeechBubbleMorph,
 TableFrameMorph, TableMorph, Variable, isSnapObject, Costume, contains, detect,
 ZERO, WHITE*/
 
-modules.lists = '2021-February-04';
+modules.lists = '2021-February-07';
 
 var List;
 var ListWatcherMorph;
@@ -409,7 +409,7 @@ List.prototype.query = function (indices) {
     first = indices.at(1);
     if (first instanceof List) {
         select = first.isEmpty() ?
-            this.range(1, this.length())
+            this.range(this.length())
                 : first;
     } else {
         select = new List([first]);
@@ -419,9 +419,9 @@ List.prototype.query = function (indices) {
     );
 };
 
-List.prototype.range = function (start, end) {
-    // private - answer a list of ascending numbers, incremented by 1
-    return new List([...Array(end - start + 1)].map((e, i) => i + start));
+List.prototype.range = function (upTo) {
+    // private - answer a list of integers from 1 up to the given ceiling
+    return new List([...Array(upTo)].map((e, i) => i + 1));
 };
 
 List.prototype.items = function (indices) {