Analytics code language usage script

scripts/analytics/mongodb/queries/CodeLanguageUsage.js

@@ -0,0 +1,30 @@
+// Print out code language usage based on level session data
+var total = 0;
+var languages = {};
+var startDate = new ISODate("2014-12-01T00:00:00.000Z")
+db['level.sessions'].aggregate(
+[ 
+    { $match : {
+        //$and: [{codeLanguage: {$exists: true}}, {created : { $gte: startDate}}]
+        codeLanguage: {$exists: true}
+    }
+    },
+    { 
+        $group : { 
+            _id: "$codeLanguage", 
+            total: {$sum: 1} 
+        }
+    },
+    {  $sort : { total : -1} }
+]
+).result.forEach( function (myDoc) { 
+    //print(myDoc)
+    total += myDoc.total;
+    if (!languages[myDoc._id])
+        languages[myDoc._id] = 0
+    languages[myDoc._id] += myDoc.total
+})
+print("Total sessions with code languages", total);
+for (key in languages) {
+    print(key, languages[key], languages[key] / total * 100);
+}