You know that most of the task planners or calendar apps have features when you create a todo, task or meeting they try to be “smart” in filling in as much details as possible?
You enter the title of a new e.g. meeting and based on some heuristics it tries to conveniently set some additional properties.
Continue reading “1 m² of source code and a single Java interface to tame it”
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.
Continue reading “Functional Java by Example | Part 8 – More Pure Functions”
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.
Continue reading “Functional Java by Example | Part 7 – Treat Failures as Data Too”
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.
Continue reading “Functional Java by Example | Part 6 – Functions as Parameters”
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.
Continue reading “Functional Java by Example | Part 5 – Move I/O to the Outside”
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.
Continue reading “Functional Java by Example | Part 4 – Prefer Immutability”
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?
Continue reading “Creative Ways of Finding a Birthday: When Are We 250 Years?”
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.
Continue reading “Functional Java by Example | Part 3 – Don’t Use Exceptions to Control Flow”
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
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.
