One problem I found in Chapter 5 BUILDING COLLABORATIVE FILTERING RECOMMENDATION ENGINES is the sample code in python doing recommendation on Movie Lens 100k data is that the RMSE values are as high as 11.
A quick google can find some tutorials on the web, doing the same thing on ml-100k data set, using SVD or ALS algorithm have a RMSE lower than 1.0, commonly 0.9x.
In the Chapter 7 of the book, BUILDING REAL-TIME RECOMMENDATION ENGINES WITH SPARK, author using Spark ALS reached 0.9x RMSE on same data set.
It looks the author did not put too much effort polishing Chapter 5’s code sample.
I would recommend following articles and samples over Chapter 5 of this book:
The requirement is simple, to sync my calendar from my company email account, which runs on Exchange Server and client is Outlook, to the Microsoft account on my Windows Phone.
This KB article stated that on Outlook 2010 or 2007, one can use the Outlook Connector software to do this, which is not my case as I am using Outlook 2013. The article also gives a silly solution for Outlook 2013, which simply need I copy meetings manually from the two calendar.
May I create a little application to do this automatically?
Get the Ionic package from NuGet, drag ‘script/ionic-bundles.js’ and ‘content/ionic.css’ to index.html to create script references
Use command ‘ionic start myApp sidemenu’ to create a project scaffold
Copy ‘www/templates’ folder from scaffold project to VS project, let it be the same level of existing ‘scripts’ folder
Create a ‘app’ folder inside ‘scripts’ folder, move index.ts from /scripts into /scripts/app, update reference of index.js in index.html. Copy app.js and controller.js from www/js of that scaffold project to /scripts/app folder.
Add or adjust references of js/ts files to index.html, create a ng-app directive.
Install angularjs.TypeScript.DefinitelyTyped by right click on angular.js in scripts folder and select “Search for Typescript Typings”.
Create a services.ts file in scripts/app folder, create service and inject to Angular
Create a controller.ts file, register service to controller.
Modify template data binding to fetch data from the service
For building failure of “The certificate specified has expired” on Windows platform, it’s a bug of Cordova tools. See: http://www.spritehand.com/2014/11/visual-studio-cordova-certificate.html