diff --git a/lib/ace/commands/default_commands.js b/lib/ace/commands/default_commands.js
index ab7f6688..9da2dd1d 100644
--- a/lib/ace/commands/default_commands.js
+++ b/lib/ace/commands/default_commands.js
@@ -321,6 +321,11 @@ exports.commands = [{
     bindKey: bindKey("Ctrl-Shift-D", "Command-Shift-D"),
     exec: function(editor) { editor.duplicateSelection(); },
     multiSelectAction: "forEach"
+}, {
+    name: "sortlines",
+    bindKey: bindKey("Ctrl-Alt-S", "Command-Alt-S"),
+    exec: function(editor) { editor.sortLines(); },
+    multiSelectAction: "forEach"
 }, {
     name: "togglecomment",
     bindKey: bindKey("Ctrl-/", "Command-/"),
diff --git a/lib/ace/editor.js b/lib/ace/editor.js
index 1010a49d..937e0e73 100644
--- a/lib/ace/editor.js
+++ b/lib/ace/editor.js
@@ -1276,6 +1276,31 @@ var Editor = function(renderer, session) {
         this.session.outdentRows(selection.getRange());
     };
 
+    // TODO: move out of core when we have good mechanism for managing extensions
+    this.sortLines = function() {
+        var rows = this.$getSelectedRows();
+        var session = this.session;
+
+        var lines = [];
+        for (i = rows.first; i <= rows.last; i++)
+            lines.push(session.getLine(i));
+
+        lines.sort(function(a, b) {
+            if (a.toLowerCase() < b.toLowerCase()) return -1;
+            if (a.toLowerCase() > b.toLowerCase()) return 1;
+            return 0;
+        });
+
+        var deleteRange = new Range(0, 0, 0, 0);
+        for (var i = rows.first; i <= rows.last; i++) {
+            var line = session.getLine(i);
+            deleteRange.start.row = i;
+            deleteRange.end.row = i;
+            deleteRange.end.column = line.length;
+            session.replace(deleteRange, lines[i-rows.first]);
+        }
+    };
+
     /**
      * Editor.toggleCommentLines() 
      * 
@@ -1308,20 +1333,20 @@ var Editor = function(renderer, session) {
 
     this.duplicateSelection = function() {
         var sel = this.selection;
-		var doc = this.session;
-		var range = sel.getRange();
-		if (range.isEmpty()) {
-			var row = range.start.row;
-			doc.duplicateLines(row, row);
-		} else {
-			var reverse = sel.isBackwards()
-			var point = sel.isBackwards() ? range.start : range.end;
-			var endPoint = doc.insert(point, doc.getTextRange(range), false);
-			range.start = point;
-			range.end = endPoint;
-			
-			sel.setSelectionRange(range, reverse)
-		}
+        var doc = this.session;
+        var range = sel.getRange();
+        if (range.isEmpty()) {
+            var row = range.start.row;
+            doc.duplicateLines(row, row);
+        } else {
+            var reverse = sel.isBackwards()
+            var point = sel.isBackwards() ? range.start : range.end;
+            var endPoint = doc.insert(point, doc.getTextRange(range), false);
+            range.start = point;
+            range.end = endPoint;
+            
+            sel.setSelectionRange(range, reverse)
+        }
     };
     
     /** related to: EditSession.moveLinesDown
@@ -2101,4 +2126,4 @@ var Editor = function(renderer, session) {
 
 
 exports.Editor = Editor;
-});
+});
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