Tom McFarlin

Software Engineering in Web Development, Backend Services, and More

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Thoughts on WordPress Developers, Communities, and Products

For those of you who are involved in working with building things for WordPress- specifically, premium plugins and themes – then you’re likely plugged closely into what many refer to as “the WordPress community.”

Granted, I’m not saying it’s not a community – it is – but it’s just part of the community, right? I mean, the word encompasses people who use WordPress to blog, people who are fans of the software, those who have contributed to it, those who build things with it, and so on.

All that to say, the community has a variety of facets.

And the challenge to this is that when we spend so much time with our subset of the community, it’s easy to accidentally develop a degree of tunnel vision such that we become at least partially focused on writing things, designing things, or buildings things with our part of the community in mind rather than our customers.

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Two Solutions for “JavaScript Reference Error Is Not Defined”

If you’re working on any type of web site or web application that has any other dependencies either for its front-end framework – such as Bootstrap and Foundation – or from the site’s foundation – such as Rails or WordPress – there’s a chance that your own JavaScript sources may result in the following:

Reference Error [variable] is not defined.

In some cases, this can be simply referring to a variable that isn’t defined (perhaps the most popular is when jQuery’s $ function has been dereferenced and you’re trying to use $) and simply needs a definition.

But, in other cases, there are times where it may not be as simple.

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A Dilemma: Hiding Elements with The WordPress Theme Customizer

When it comes to working with the WordPress Theme Customizer, one of the options that you’re likely to see in other themes (or that you’re likely to introduce in your own themes) is an option that is responsible for toggling the visibility of an element.

For example, if a text box is empty, you may want to hide an element. Or, more simply, perhaps a user will need to click on an checkbox to toggle whether or not to display an element.

But this presents a dilemma: Either we can send all of the information to the browser and control its visibility using a class name, or we can send less code to the browser but lose a smooth user experience when using the Theme Customizer.

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Steps To Writing Clean WordPress Code

I’d like to think that one of the things that most good developers continually strive for is writing the cleanest, most maintainable code possible.

Personally, I don’t know if there is an actual point at which you reach it – it’s the whole journey-not-a-destination thing – but that doesn’t mean that we shouldn’t continually aim to get better at what we do. In our case, that’s writing clean WordPress code.

The thing is, there’s only so far you can get on your own. You can read a number of books, follow the advice of some high profile programmers, and read as much of the “academic” material that you can get your hands on – and I think all of the above is great – but, at the same time, it only goes so far.

To that end, I think it’s worth seeking out other people in your same field to help provide some level of mentorship on how it relates to writing clean code because here’s the thing:

As much material as we can read written by other people, nothing beats interacting with those who are writing code in the same language(s) for the same APIs under the same coding standards and who are farther along than you in experience.

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How To Define a New WordPress Cron Schedule

Last year, I shared how to properly setup a WordPress cron job in which I walked through the process of defining a cron job in the operating system so that a job fires as a true scheduled task (rather than the faux tasks that WordPress provides).

This isn’t to say that the native WordPress scheduled tasks are bad – they just may not work as expected for those who are used to native cron jobs.

Another limitation of the the WordPress scheduling system is that it defines only a handful of intervals in which your tasks may run. These include:

  • `hourly`
  • `daily`
  • `twicedaily`

And these are fine for a lot of tasks, but if you’re looking to define a new WordPress cron schedule, you’ll need to define a custom filter.

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