The Daily WTF: Curious Perversions in Information Technology

Null Null Null

by Lyle Seaman in Error'd on 2026-05-08

The single most common category of entries for this column is failed handling of NaN, null and undefined. Almost exclusively from javascript in web pages, sometimes in node servers, and almost never any other languages or frameworks. They're getting a bit repetitive but it's our solemn duty to call out failure where we find it. So if you send us one of these, make sure it identifies the source!

"If you want something you've never had, do something you've never done" exhorted Ben.

4 comments - Last comment @ 14:38

Failing to Fail

by Remy Porter in CodeSOD on 2026-05-07

Russell F (previously) sends us a small one today. It's not just a representative line, it's a representative comment. More than that, it's a true confession. Russell wrote some code, you see, and the logic was confusing. So, a co-worker added a comment to explain what the code was doing:

'This is *supposed* to fail. If it fails to fail, it throws a failure message

12 comments - Last comment @ 2026-05-07

Please Find, Rewind

by Remy Porter in CodeSOD on 2026-05-06

As previously discussed, C++ took a surprisingly long time to get a "starts with" function for strings. It took even longer to get a function called "contains". In part, that's simply because string::find solves that problem.

Nancy sends us a… different approach to solving this problem.

13 comments - Last comment @ 2026-05-07

Not for Nullthing

by Remy Porter in CodeSOD on 2026-05-05

Today's anonymous submitter sends us some code that just makes your mind go… blank when you look at it.

	public static boolean isNull(String value) {
		return StringUtils.isBlank(value);
	}

13 comments - Last comment @ 2026-05-06

Empty Pockets

by Remy Porter in Feature Articles on 2026-05-04

If you've seen one developer recounting how their AI agent deleted production, you've seen them all. They're mostly not interesting stories. It's like watching someone speeding through traffic on a motorcycle without a helmet: the eventual tragedy is sad, but it's unsurprising and not an interesting story to tell. It's not even interesting as a warning: the kind of person who speeds on a motorcycle without a helmet isn't doing so because they don't understand the danger. They've just decided it doesn't apply to them.

But the founder of PocketOS, Jer, recently shared how- whoopsie!- their AI agent deleted production. There's a lot of ingredients that go into this particular disaster, which I think makes it interesting, because the use of a poorly supervised AI agent is only one ingredient in this absolute trainwreck of a story.

39 comments - Last comment @ 09:57

Parametric Projection

by Lyle Seaman in Error'd on 2026-05-01

Roger C. gets on second base with an unforced error. "Not only is the content too large, the error message informing us of this is also too large to fit the visible space. A layered, double WTF."

9 comments - Last comment @ 14:38

Cancel Catch

by Remy Porter in CodeSOD on 2026-04-30

"This WTF is in Matlab" almost feels like cheating. At one place I worked, somebody's job was struggling through a mountain of Matlab code and porting it into C. "This Matlab code looks like it was written by an alien," also doesn't really get much traction- all Matlab code looks like it was written by an alien. This falls into the realm of "Researchers use Matlab, researchers may be very smart about their domain, but generally don't know the first thing about writing maintainable code, because that's not their job."

But let's take a look at some MatLab Carl W found:

16 comments - Last comment @ 2026-05-06

A Whale of a Problem

by Ellis Morning in Feature Articles on 2026-04-29

From our Anonymous submitter:

Our company creates graphs to visualize data. We have many small fish customers, but we have one whale who uses our product that is 90% of company revenue. (WTF number 1.)

20 comments - Last comment @ 2026-05-04