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ADVENTURES IN FIZZBUZZ Tests for programmers in an interview process are not uncommon. For the last couple of years I have asked a quick pre-interview question to junior developers to see what sort of stuff they come up with. As I don't want to set any developer a task that will take longer than absolutely needed I opted to set a very simple task for them. Commonly known as "FizzBuzz", this task is as follows.

INVERTING A SCALE

One technique I find useful, especially when drawing images, is to invert a number on a scale. In PHP, coordinates in an image are drawn from the top left of the image. This means that if we want to draw from the bottom left then we need to invert the y coordinate. The following is example PHP code that creates an image with a single, diagonal line, drawn across the middle. DRUPAL8: FINDING ALL FIELDWIDGET TYPES Whilst searching for an answer to a problem the other day I found a

comment that

details a command that prints out all of the FieldWidgets available in Drupal 8. This is useful if you are looking for all of the field widget classes in Drupal8. Here is the command: TRAITS VERSUS INHERITANCE IN PHP The other day I was conducting a code review and found that a developer had used a trait to give two classes the same group of utility methods. Whilst there was nothing wrong with this in terms of functionality, I asked the developer why they had chosen to use traits instead of inheritance. We eventually decided that an inheritance model would be better suited to the situation but I thought I would go through some of the thought processes here.

WHAT IS A TRAIT?

DRUPAL 8: ALTERING UPDATE DEPENDENCIES I perform a lot of Drupal updates, and they mostly go very well. The code updates without incident and the database updates apply whatever updates they need without a hitch. Every now and then, however, I will come across a project that hasn't received updates in a while, which means there are a lot of database updates to run through. Having Drupal run 100+ database updates across modules and core can be a bit problematic. Some modules will require core updates to happen first, and when this happens out of order the database update update fails spectacularly. PHP CUSTOM STREAM FILTERS Stream filters allow changes to be made to textual data in streams. This allows text to be changed when writing to or reading from streams, instead of changing the text after the stream has been run. There is a framework built into PHP that allows custom filters to be added to the group of built in filters. PHP CUSTOM STREAM WRAPPERS Part of the strength of PHP's stream wrappers is the ability to add our own stream wrappers to the list of available wrappers. We can therefore natively open any type of resource just by registering a stream wrapper and then using the normal fopen() functions. The custom stream wrapper functionality is made possible through a few functions built into PHP.

PHP STREAMS

Streams are a way of generalising file, network, compression resources and a few other things in a way that allows them to share a common set of features. I stream is a resource object that has streamable behaviour. It can be read or written to in a linear fashion, but not necessarily from the beginning of the stream. DRUPAL 8: ALTERING HOOK WEIGHTS Drupal's hook system allows modules to interact with various parts of a Drupal application and is part of the power of the application. One common issue I have found is altering things that have been added by other modules during the hooks process. For example, a hook might be called that involves gathering data from one or more modules. If you need to intercept this configuration there is no guarantee that your module will be called after the module you are trying to

intercept.

COLOR SORTING IN PHP: PART 5 Since my last visit to this subject I have been thinking about how to represent a collection of random colors so that it looks sorted and that no information is lost during that process. I quickly realised that I needed to use all three aspects of the color space, which lends itself to generating 3D objects. Indeed, the red, green, blue color space is built around a cube so it can often be represented as a cube.

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