3 files changed, 55 insertions, 3 deletions

diff --git a/history.txt b/history.txt
index 2ef91cb..135ee7f 100755
--- a/history.txt
+++ b/history.txt
@@ -1944,3 +1944,4 @@ ______
 131008
 ------
 * Lists: fixed type-issue for linked list indices (thanks, Nate, for reporting it!)
+* Threads, Objects: experimental MAP primitive reporter in lists category, visible in dev mode
diff --git a/objects.js b/objects.js
index dfdd826..74ea20c 100644
--- a/objects.js
+++ b/objects.js
@@ -124,7 +124,7 @@ PrototypeHatBlockMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.objects = '2013-October-04';
+modules.objects = '2013-October-08';
 
 var SpriteMorph;
 var StageMorph;
@@ -1045,6 +1045,13 @@ SpriteMorph.prototype.initBlocks = function () {
             defaults: [1, null, localize('thing')]
         },
 
+        // MAP - experimental
+        reportMap: {
+            type: 'reporter',
+            category: 'lists',
+            spec: 'map %repRing over %l'
+        },
+
         // Code mapping - experimental
         doMapCodeOrHeader: { // experimental
             type: 'command',
@@ -1850,6 +1857,22 @@ SpriteMorph.prototype.blockTemplates = function (category) {
         blocks.push(block('doInsertInList'));
         blocks.push(block('doReplaceInList'));
 
+    // for debugging: ///////////////
+
+        if (this.world().isDevMode) {
+            blocks.push('-');
+            txt = new TextMorph(localize(
+                'development mode \ndebugging primitives:'
+            ));
+            txt.fontSize = 9;
+            txt.setColor(this.paletteTextColor);
+            blocks.push(txt);
+            blocks.push('-');
+            blocks.push(block('reportMap'));
+        }
+
+    /////////////////////////////////
+
         blocks.push('=');
 
         if (StageMorph.prototype.enableCodeMapping) {
@@ -4485,6 +4508,22 @@ StageMorph.prototype.blockTemplates = function (category) {
         blocks.push(block('doInsertInList'));
         blocks.push(block('doReplaceInList'));
 
+    // for debugging: ///////////////
+
+        if (this.world().isDevMode) {
+            blocks.push('-');
+            txt = new TextMorph(localize(
+                'development mode \ndebugging primitives:'
+            ));
+            txt.fontSize = 9;
+            txt.setColor(this.paletteTextColor);
+            blocks.push(txt);
+            blocks.push('-');
+            blocks.push(block('reportMap'));
+        }
+
+    /////////////////////////////////
+
         blocks.push('=');
 
         if (StageMorph.prototype.enableCodeMapping) {
diff --git a/threads.js b/threads.js
index a705f28..ee28e59 100644
--- a/threads.js
+++ b/threads.js
@@ -83,7 +83,7 @@ ArgLabelMorph, localize, XML_Element, hex_sha512*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.threads = '2013-October-04';
+modules.threads = '2013-October-08';
 
 var ThreadManager;
 var Process;
@@ -778,7 +778,7 @@ Process.prototype.evaluate = function (
     runnable.isImplicitLambda = context.isImplicitLambda;
     runnable.isCustomBlock = false;
 
-    // assing parameters if any were passed
+    // assign parameters if any were passed
     if (parms.length > 0) {
 
         // assign formal parameters
@@ -1515,6 +1515,18 @@ Process.prototype.doWaitUntil = function (goalCondition) {
     this.pushContext();
 };
 
+Process.prototype.reportMap = function (reporter, list) {
+    if (this.context.inputs.length - 2 === list.length()) {
+        this.returnValueToParentContext(
+            new List(this.context.inputs.slice(2))
+        );
+        return;
+    }
+    var next = list.at(this.context.inputs.length - 1);
+    this.pushContext();
+    this.evaluate(reporter, new List([next]));
+};
+
 // Process interpolated primitives
 
 Process.prototype.doWait = function (secs) {