* Array comprehension is gone from ES6; adjust accordingly.

spreadsheet/README.md

@@ -27,7 +27,7 @@ If you'd like to use Chrome, type `make run` or `node extra/static-here.js` and
 
 To build from source, first install [NodeJS](http://www.nodejs.org/) 0.10 or later, and run `make` (only tested on Linux/OSX at the moment).
 
-JS source code (`main.js` and `worker.js`) are written in ECMAScript 6 (aka _ES.next_, aka _Harmony_), specifically the subset marked with [TC39 Consensus](https://developer.mozilla.org/en-US/docs/Web/JavaScript/ECMAScript_6_support_in_Mozilla) as of February 2014.
+JS source code (`main.js` and `worker.js`) are written in ECMAScript 6 (aka _Harmony_), specifically the [feature-frozen draft](https://developer.mozilla.org/en-US/docs/Web/JavaScript/ECMAScript_6_support_in_Mozilla) as of August 2014.
 
 For backward compatibility with ECMAScript 5 browsers, we use [Traceur](https://github.com/google/traceur-compiler) to compile source files into the `es5/` directory.
 

spreadsheet/main.js

@@ -1,7 +1,8 @@
 angular.module('500lines', []).controller('Spreadsheet', function ($scope, $timeout) {
   // Begin of $scope properties; start with the column/row labels
-  $scope.Cols = [ for (col of range( 'A', 'H' )) col ];
-  $scope.Rows = [ for (row of range( 1, 20 )) row ];
+  $scope.Cols = [], $scope.Rows = [];
+  for (col of range( 'A', 'H' )) { $scope.Cols.push(col); }
+  for (row of range( 1, 20 )) { $scope.Rows.push(row); }
 
   function* range(cur, end) { while (cur <= end) { yield cur;
     // If it’s a number, increase it by one; otherwise move to next letter

spreadsheet/worker.js

@@ -4,11 +4,11 @@ self.onmessage = ({data})=>{
 
   for (const coord in sheet) {
     // Four variable names pointing to the same coordinate: A1, a1, $A1, $a1
-    for (const name of [ for (p of [ '', '$' ])
-                           for (c of [ coord, coord.toLowerCase() ])
-                             p+c ]) {
+    [ '', '$' ].map( p => [ coord, coord.toLowerCase() ].map(c => {
+      const name = p+c;
+
       // Worker is reused across computations, so only define each variable once
-      if ((Object.getOwnPropertyDescriptor( self, name ) || {}).get) { continue; }
+      if ((Object.getOwnPropertyDescriptor( self, name ) || {}).get) { return; }
 
       // Define self['A1'], which is the same thing as the global variable A1
       Object.defineProperty( self, name, { get() {
@@ -37,7 +37,7 @@ self.onmessage = ({data})=>{
         switch (typeof vals[coord]) { case 'function': case 'object': vals[coord]+=''; }
         return vals[coord];
       } } );
-    }
+    }));
   }
 
   // For each coordinate in the sheet, call the property getter defined above