Systems | Development | Analytics | API | Testing

Reactive programming is a programming technique for asynchronous applications that lets you structure your code based on “reaction” to data input changes instead of an imperative programming style where you have to poll or block and wait for changes to happen. If you’re not 100% familiar with ReactiveX (RxJava being the implementation for the JVM), perhaps you know Java Stream, which is a similar concept introduced in Java 8.

Editor's note: Today’s post is by Anuschka Diderich, Platform Lead at KPN, a 130-year-old Dutch landline and mobile telecommunications services company. Read on to learn how KPN is connecting people using API-powered products and services. “I’ll connect you.” Those were the first words uttered over the line in 1881, when the first public telephone network in the Netherlands started operating.

An internal linking strategy delivers many benefits for both your site’s rankings and its visitors. Here’s everything you need to know about internal links.

Monitor the number of prospects contacted daily, the number of replies your sales emails receive, how many prospects are engaging with your sales team, and more.

Should you pay for placement at the top of search results or work long and hard to get there organically? We asked 58 marketers; here’s what they recommend.