fixed #2108 (added drop-down menu to "letter _ of _ ")

history.txt

@@ -4141,3 +4141,7 @@ in development:
 180609
 ------
 * Objects, Threads: Also trigger "When I am stopped" when programmatically calling "stop all"
+
+180611
+------
+* Objects, Threads: fixed #2108 (added drop-down menu to "letter _ of _ ")

objects.js

@@ -83,7 +83,7 @@ BlockEditorMorph, BlockDialogMorph, PrototypeHatBlockMorph, localize,
 TableMorph, TableFrameMorph, normalizeCanvas, BooleanSlotMorph, HandleMorph,
 AlignmentMorph, Process, XML_Element, VectorPaintEditorMorph*/
 
-modules.objects = '2018-June-09';
+modules.objects = '2018-June-11';
 
 var SpriteMorph;
 var StageMorph;
@@ -1020,7 +1020,7 @@ SpriteMorph.prototype.initBlocks = function () {
         reportLetter: {
             type: 'reporter',
             category: 'operators',
-            spec: 'letter %n of %s',
+            spec: 'letter %idx of %s',
             defaults: [1, localize('world')]
         },
         reportStringSize: {

threads.js

@@ -62,7 +62,7 @@ StageMorph, SpriteMorph, StagePrompterMorph, Note, modules, isString, copy,
 isNil, WatcherMorph, List, ListWatcherMorph, alert, console, TableMorph,
 TableFrameMorph, ColorSlotMorph, isSnapObject*/
 
-modules.threads = '2018-June-09';
+modules.threads = '2018-June-11';
 
 var ThreadManager;
 var Process;
@@ -2695,10 +2695,17 @@ Process.prototype.reportJoinWords = function (aList) {
 // Process string ops
 
 Process.prototype.reportLetter = function (idx, string) {
+    var i;
     if (string instanceof List) { // catch a common user error
         return '';
     }
-    var i = +(idx || 0),
+    if (this.inputOption(idx) === 'any') {
+        idx = this.reportRandom(1, string.length);
+    }
+    if (this.inputOption(idx) === 'last') {
+        idx = string.length;
+    }
+    i = +(idx || 0),
         str = isNil(string) ? '' : string.toString();
     return str[i - 1] || '';
 };