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.
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?
‘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.
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.
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.
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.
Drush is a tool that allows you to perform common Drupal tasks from the command line.