The Daily WTF: Curious Perversions in Information Technology

Convert Back, Way Back

by Remy Porter in CodeSOD on 2026-07-28

Windows Presentation Foundation, the XML-based UI framework for Windows, has its own "fun" quirks. One of its core ideas is that controls can be data-bound: that text box is linked to a numeric field in your model class. Type a different number, and the model automagically updates.

That's fine for what it is, but of course you're going to need to give it some instructions on how to do those kinds of conversions for your own custom types. And that's where the IValueConverter interface comes in.

8 comments - Last comment @ 11:30

Classic WTF: Fork and Log

by Mark Bowytz in CodeSOD on 2026-07-21

We keep our summer break going. Today, there's something floating in the pool, and I don't think it's a Snickers bar. Original. --Remy

A few years back, Adam C. was brought in to help with some performance problems that appeared while load testing a VXML Platform. The project was already well behind and they couldn't figure out why the system kept falling over under a very slight load. To make matters worse, Adam had absolutely no prior knowledge of the system or its software other than Wikipedia’s definition of what VXML is.

A veteran to these sorts of situations, Adam grabbed a coffee, a donut, and then started picking through the application logs to get a feel for what the system is doing and where something might be going wrong.

4 comments - Last comment @ 2026-07-22

Classic WTF: The Table Selector

by Alex Papadimoulis in CodeSOD on 2026-07-20

It's summer break time, which as always, means we dip back into classic articles. Today, we pick which table we want. Original. --Remy

"In my native language of German," writes Christian, "the word quellcode is a pretty direct translation of 'source code'."

"Unfortunately, bad code seems to cross language barriers - as does that famous three-letter explicit adjective. But occasionally I’ll find a piece of quellcode that deserves its own special, localized expletive: quäl-kot. When I stumbled across this interface in our quellcode, quäl-kot was the first thing that came to my mind."

11 comments - Last comment @ 2026-07-21

Wait Longer

by Remy Porter in CodeSOD on 2026-07-16

Karen was maintaining some specification tests that were flaky. Not extremely flaky, but three or four times out of a thousand, the tests would just fail. The tests were complicated, and some of the operations were timing sensitive, so it wasn't precisely surprising- but the problem was that they were actually generous with their timing windows. The unit tests passed consistently, it was only these functional, specification-based tests that failed.

So, for example, there were sections in the tests where they wanted to wait at least 2ms. Since the code and tests were in TypeScript, they used the setTimeout function, which per standard JavaScript documentation warns that it may wait longer. But again, Karen was fine with longer.

11 comments - Last comment @ 2026-07-18

The Error Check

by Remy Porter in CodeSOD on 2026-07-15

Today's submission is less a WTF and more a, "Yeah, that'd annoy me too."

Stevie works in a code-base that's largely C, which means function return values are usually used to communicate to status codes. The standard:

32 comments - Last comment @ 2026-07-22

AAYFN

by Remy Porter in CodeSOD on 2026-07-14

Jason M sends us some Ruby code.

def bv(prop, tv="Yes", fv="No", nv="Not Specified")
  v = self.send(prop)
  if v === true
    tv
  elsif v === false
    fv
  else
    nv
  end
 end

17 comments - Last comment @ 2026-07-16

Module Test

by Remy Porter in CodeSOD on 2026-07-08

TJ inherited a NestJS project. The original developers left the team many years ago, but they've left their mark in the codebase.

// ProjectsModule.ts
@Module({
  controllers: […],
  providers: […],
  exports: […],
})
export class ProjectsModule {}

9 comments - Last comment @ 2026-07-12

On Hold

by Remy Porter in CodeSOD on 2026-07-07

"Dragoncoder" supports a web application that has a "wait time" for access. I hate that that's a thing, but I recognize that there are real-world constraints where this might make sense. Still, I hate it. But that's not the WTF.

      var minutes = parseInt( 12 , 10);
      var time = document.getElementById('waitTime');

      if ( minutes < 2) {
        time.innerText = "Your estimated wait time is 12 minute."
      } else if (minutes < 60) {
        time.innerText = "Your estimated wait time is 12 minutes."
      } else if (minutes === 60) {
        time.innerText = "Your estimated wait time is 0 hour."
      } else if (minutes < 120 && (minutes % 60 === 1)) {
        time.innerText = "Your estimated wait time is 0 hour and 12 minute."
      } else if (minutes < 120) {
        time.innerText = "Your estimated wait time is 0 hour and 12 minutes."
      } else if (minutes > (60 * 4)) {
        time.innerText = "Your estimated wait time is more than 4 hours."
      } else if (minutes % 60 === 0) {
        time.innerText = "Your estimated wait time is 0 hours."
      } else {
        time.innerText = "Your estimated wait time is 0 hours and 12 minutes."
      }

28 comments - Last comment @ 2026-07-09

The Most Dangerous Game

by Remy Porter in CodeSOD on 2026-07-02

While we talk about bad video game code periodically, we generally avoid it because it's so specialized and while something like fast inverse square root is bad code from a maintainability perspective, it's great code for abusing floating points to make math fast.

Işıtan Yıldız sends us a snippet from a game's config file. I won't pick on the specific game, but this isn't some random build of TuxCart, but a released game sold on multiple platforms. It's from a small team, but it's an actual professional product running on many devices. What's notable about this is the game has multiplayer elements, which means networking code, which means…

11 comments - Last comment @ 2026-07-05

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