Functional Java by Example | Part 8 – More Pure Functions

This is part 8, the last instalment of the series called “Functional Java by Example”.

The example I’m evolving in each part of the series is some kind of “feed handler” which processes documents. In the last instalment we’ve seen some pattern matching, using the Vavr library, and treated failures as data too, e.g. take an alternative path and return back to the functional flow.

In this last post of the series I’m taking functions to the extreme: everything becomes a function.

Functional Java by Example | Part 7 – Treat Failures as Data Too

This is part 7 of the series called “Functional Java by Example”.

The example I’m evolving in each part of the series is some kind of “feed handler” which processes documents. We’ve already dealt with exceptional situations before, but we’re going to take care of them, more ehm,…functionally — as data.

Functional Java by Example | Part 6 – Functions as Parameters

This is part 6 of the series called “Functional Java by Example”.

The example I’m evolving in each part of the series is some kind of “feed handler” which processes documents. In previous part we tried to make our functions as pure possible by moving as much of the side-effects, such as IO, to the outside of the system.

Now we’re going to replace some of our abstractions into functions, to be passed as parameters.

Functional Java by Example | Part 5 – Move I/O to the Outside

This is part 5 of the series called “Functional Java by Example”.

In previous part we stopped mutating our documents and returned copies of the data. Now, we need to move some I/O away.

Functional Java by Example | Part 4 – Prefer Immutability

This is part 4 of the series called “Functional Java by Example”.

In previous part we talked a bit about side effects and I’d like to elaborate a bit more about how we can prevent having our data manipulated in unexpected ways by introducing immutability into our code.

Creative Ways of Finding a Birthday: When Are We 250 Years?

Today is my birthday.

Yes, it is actually my birthday: May the 15th. So, I thought it would be fun to write about a little algorithmic puzzle I’ve been pondering about. You see, each year we grow older; as a person, but also collectively as an organisation, a group, a community. That’s a lot of combined knowledge I reckon. 🙂

Take, for instance, my immediate family. My parents Christiaan and Marijke, my little sister Petra and dear girlfriend Jolien. All together, we have a combined age of 234 years! Wow, isn’t that something?

I wondered: at who’s birthday have we reached a grand total of 250 years combined knowledge?

Functional Java by Example | Part 3 – Don’t Use Exceptions to Control Flow

This is part 3 of the series called “Functional Java by Example”.

The example I’m evolving in each part of the series is some kind of “feed handler” which processes documents. In previous parts I started with some original code and applied some refactorings to describe “what” instead of “how”.

In order to help the code going forward, we need to get rid of the good ol’ java.lang.Exception. (disclaimer: we can’t actually get rid of it) That’s where this part comes in.

X-Mas Musings #24 – Merry Christmas!

December is for many people a period of reflection or thought. So I decided to reflect upon last year’s things and thoughts — each day until Christmas.

Christmas is tomorrow and so I can finally stop these musings, with lots ‘o ramblings I needed to get of my chest and looking back to the things which happened last year – keeping it a bit work-related but always a challenge to write each day.

Thank you for still being here and not unsubscribing from my blog last month. The first thing I’ll do next year is continue to talk about software again  — I promise 🙂

That being said: I’ll take this last moment to wish you a

Merry Christmas🎄 with lots of friends and family and a Very, Very Good & Happy 2018 🌟

X-Mas Musings #23 – Devoxx

December is for many people a period of reflection or thought. So I decided to reflect upon last year’s things and thoughts — each day until Christmas. This is day 23.

X-Mas Musings #22 – Kotlin

December is for many people a period of reflection or thought. So I decided to reflect upon last year’s things and thoughts — each day until Christmas. This is day 22.