Posts Tagged: java lambdas

RxJava: Some Usage of Observable.zip

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Here’s ¬†classic problem when dealing with a web app: you get a HTTP request to your app with a set of parameters. You need to hit a datastore to retrieve some record based on those parameters. You also need to create a (log?) entry somewhere about receiving this call — whether it’s for monitoring purposes […]

Using Optional in Java to check for null

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I see the need for null in Java still, but since the Optional class was introduced I think some of the usages of null can be eliminated by employing some of the capabilities of the Optional class. I will explain in this post a nice way you can implement checking for null in Java by […]

Nicer implementations using Java streams

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I am not entirely sold on the performance of the Java streams but I will accept they are getting much better compared to the first cut, we now have parallel streams and all sorts, and also it provides a (nicer) functional approach to coding. I’m not going to go into the whole dispute of whether […]

Scripting

Java, Map and Optional

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I do like the Optional class in Java — it is a long awaited elegant replacement for returning null whenever something isn’t there then relying on if( x != null ) checks or using ?: in the format (x == null) ? “foo” : “bar”. It works great also with the new Java stream classes […]

Java 8 — Map and the Unknown “Niceties”

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Despite Java 9 making its way into the real world nowadays, I see a lot of Java code out there still relying on the old-style Java 6-like syntax. And I’m not talking about the usage of lambda’s, stream’s and the likes, but rather some of the improvements Java 8 brought to existing classes in the […]