Have you ever visited different types of churches and listened to how they pray? Growing up, I had the privilege of visiting several churches. They were all different. And the people in them prayed with different styles.
Nobody wants to deliver late, over-budget software. I don’t know a single software developer who wakes up in the morning and thinks “I’d like to do a rubbish job today. How can I cost my employer more money?” And yet, so many software projects don’t go well. And with every new project, there seems to be more and more pressure to go faster. So, if we’re in the business of making software, what do we do? How do we go faster without compromising quality?
Have you ever started writing some code that seemed so simple? But then you had to validate the input? And handle an edge case? Oh yeah, and that weird thing the server sometimes does? And somehow this oh-so-simple piece of code turned into a mess? This article looks at how we can reduce the complexity introduced by conditionals.
We've been talking about writing less complex JavaScript. We do this by choosing the right abstraction to solve a problem. But how do you know which abstraction to use? So far, we haven't looked at any concrete examples of how to do this. In this article we look at how to deal with JavaScript arrays, without using any loops. The end result is less complex code.
I’ve been working a lot with a legacy code-base lately. And this one is particularly troublesome. It has all the hallmarks of a rush job. The code is brittle. There are no tests. Things often seem to break at random. And to my embarrassment, I wrote most of it. So, I've been thinking about how I ended up here. How did the code get so intertwined and brittle? And how do I prevent it in future?
Is it OK for a Christian to write fantasy stories? The bible is pretty clear that people should not use magic. Why would it be OK to write about magic? And isn't the whole idea of writing fantasy stories frivolous anyway? Wouldn't our time be better spent serving the poor and telling people about Jesus, or even reading the bible? I would argue that not only is it OK, but if you are a Christian with the inclination to write fantasy stories, it’s helpful if you do.
Monads have a bad reputation in the JavaScript community. Douglas Crockford even said that monads are cursed: Once you reach enlightenment and finally understand monads, you immediately lose the ability to explain them to others. Even amongst experienced functional programmers, monads are treated with respect. But, if you can understand Promises then you can understand monads.
How to you make yourself do things that you don’t feel like doing? When it’s a cold winter morning and you have to get up in the dark to go to work, how do you make yourself leave the warm bed? If you’ve just started a diet, how do you resist the doughnuts your work colleague decided to share? How do you make yourself strap on the running shoes and go jogging? Doing things you don’t feel like doing is hard work---it takes willpower. But where do you get the motivation?
‘One weird trick’ is a cheesy title, I know. Originally I was using it as a draft placeholder title for a joke. But the more I thought about it, the more it seemed appropriate because it's true. Test Driven Development is one weird trick that will change the way you code forever. It will make you a more badass developer.
Sometimes TDD can seem like a drag. Are you writing mocks that are several times more complicated than the code you will test? Does your test suite take minutes (or hours) to run? Does refactoring your code fill you with dread because of all the tests to rewrite? If any of this sounds familiar then it may be time to try a new strategy.
This is part three of a three-part series outlining my personal approach to JavaScript TDD. Testing code that creates HTML and manipulates the DOM can be tricky—especially when testing without a browser. In this article I outline one approach to this, and finish off the sample application we have been building through the series.
Working with JavaScript network calls can be tricky when practicing Test Driven Development. This article gives an example of how to use stubs and Promises to make testing network calls easier. This is part two of a three-part series outlining my personal approach to JavaScript TDD.
Getting started with test driven development (TDD) can be daunting. It sounds tedious, boring and hard. There’s also a confusing array of frameworks and libraries out there. Some work on the server; some work in the browser; some do both... it can be hard to know where to start. This is part one of a three-part series outlining my personal approach to JavaScript TDD.
I really like Star Wars, and I enjoyed The Force Awakens. I think that when you dig below the surface, the ways in which it agrees and disagrees with Christianity are different from what you might expect. In the end, the Star Wars movies are just that: a bunch of movies. But, as I've said before, if we watch in the right way, movies can point us to something deeper and more meaningful—a new and better hope.
In the last article of our four-part introduction to functional programming in JavaScript,
we looked at higher-order functions. In this article we discuss how to use these new tools with style.
In the last article, we saw how functional
programming can be used with arrays. In this
article we examine higher-order
functions—functions for making functions.
In the previous article, we saw how functions can be used to make certain code abstractions easier. In this
article we apply these techniques to arrays and lists.
What is all the hype about Functional JavaScript? And why is it called functional? It’s not as though anyone sets out to write dysfunctional Javascript. What is it good for? Why would you bother?
Over Easter, our pastor challenged us to live like Jesus is actually risen. Someone I know (quite rightly) asked the question “but what does that look like?” My response is that part of the answer is righteousness, but that might need some explaining.
First of all, I write this to myself as much as anybody. Now, with that said…
I am concerned about how Christianity is perceived by those who don’t call themselves ‘Christian.’ It’s not that Christians are ridiculed in the media (we’ve always been ridiculed), but rather, what people assume I mean when I call myself a Christian is so very different from what I actually mean that I’m almost hesitant to use the word.
For a recent project I needed to process some code in parallel. A colleague pointed me to the pcntl_fork() function, and it turns out it’s not quite as scary and complicated as I thought. So I turned the simple use case into a generic function.
These are some notes to myself on how I would like to approach my work, at least, an ideal for who I would like to be as a Christian web developer. I write this mostly to organise my own thoughts, but I am publishing it just in case there are others who might find it helpful.
You can find a reasonably sensible example of how to perform parallel processing with PHP using the `popen()` function at wellho.net. Sometimes though, the requirement to pass all the parameters to your function via command line arguments can be limiting.
Why would Christians watch movies at all? They are full of violence and bad language and plenty of other things we try to avoid. They are made by people who have completely different world views than our own, and disagree with most of the beliefs we hold most dear. Why would we fill our heads with all this simply for the sake of entertainment?
Sometimes I will talk to somebody, and think that I’m expressing
myself really clearly when I’m not. I seem to make perfect sense. Yet
when I hear what the other person says in response, it is obvious that
they heard something quite different from what I thought I said.