The Daily WTF: Curious Perversions in Information Technology

Tern Down a Date

by Remy Porter in Representative Line on 2025-03-25

Today's anonymous submitter has managed to find a way to do date formatting wrong that I don't think I've seen yet. That's always remarkable. Like most such bad code, it checks string lengths and then adds a leading zero, if needed. It's not surprising, but again, it's all in the details:

// convert date string to yyyy/MM/DD
return dtmValue.Year + "-" + ((dtmValue.Month.ToString().Length == 1)?  ("0" + dtmValue.Month.ToString()): dtmValue.Month.ToString()) + "-" + ((dtmValue.Day.ToString().Length == 1)? ("0" + dtmValue.Day.ToString()): dtmValue.Day.ToString());

15 comments - Last comment @ 2025-03-25

The Rounding Error

by Remy Porter in Representative Line on 2025-03-24

At one point, someone noticed that some financial transactions weren't summing up correctly in the C# application Nancy supported. It didn't require Superman or a Peter Gibbons to figure out why: someone was using floating points for handling dollar amounts.

That kicked off a big refactoring project to replace the usage of double types with decimal types. Everything seemed to go well, at least until there was a network hiccup and the application couldn't connect to the database. Let's see if you can figure out what happened:

18 comments - Last comment @ 2025-03-25

NaN is the Loneliest Number

by Lyle Seaman in Error'd on 2025-03-21

Today we have a whole batch of category errors, picked out from the rash of submissions and a few that have been festering on the shelf. Just for fun, I threw in an ironic off-by-some meta-error. See if you can spot it.

Adam R. "I'm looking for hotel rooms for the 2026 Winter Olympics in Milan-Cortina. Most hotels haven't opened up reservations yet, except for ridiculously overprice hospitality packages. This search query found NaN facilities available, which equates to one very expensive apartment. I guess one is not a number now?"

8 comments - Last comment @ 2025-03-24

Over Extended Methods

by Remy Porter in Feature Articles on 2025-03-20

Jenny had been perfectly happy working on a series of projects for her company, before someone said, "Hey, we need you to build a desktop GUI for an existing API."

The request wasn't the problem, per se. The API, on the other hand, absolutely was.

17 comments - Last comment @ 2025-03-20

Reliability Test

by Remy Porter in CodeSOD on 2025-03-19

Once upon a time, Ryan's company didn't use a modern logging framework to alert admins when services failed. No, they used everyone's favorite communications format, circa 2005: email. Can't reach the database? Send an email. Unhandled exception? Send an email. Handled exception? Better send an email, just in case. Sometimes they go to admins, sometimes they just go to an inbox used for logging.

Let's look at how that worked.

19 comments - Last comment @ 2025-03-23

Spaced Out Prefix

by Remy Porter in CodeSOD on 2025-03-18

Alex had the misfortune to work on the kind of application which has forms with gigantic piles of fields, stuffed haphazardly into objects. A single form could easily have fifty or sixty fields for the user to interact with.

That leads to C# code like this:

16 comments - Last comment @ 2025-03-25

Too Many Red Flags

by Ellis Morning in Feature Articles on 2025-03-17

Fresh out of university, Remco accepted a job that allowed him to relocate to a different country. While entering the workforce for the first time, he was also adjusting to a new home and culture, which is probably why the red flags didn't look quite so red.

The trouble had actually begun during his interview. While being questioned about his own abilities, Remco learned about Conglomcorp's healthy financial position, backed by a large list of clients. Everything seemed perfect, but Remco had a bad gut feeling he could neither explain nor shake off. Being young and desperate for a job, he ignored his misgivings and accepted the position. He hadn't yet learned how scarily accurate intuition often proves to be.

22 comments - Last comment @ 2025-03-24

No Time Like the Present

by Lyle Seaman in Error'd on 2025-03-14

I'm not entirely sure I understand the first item today, but maybe you can help. I pulled a couple of older items from the backlog to round out this timely theme.

Rudi A. reported this Errord, chortling "Time flies when you're having fun, but it goes back when you're walking along the IJ river!" Is the point here that the walking time is quoted as 77 minutes total, but the overall travel time is less than that? I must say I don't recommend swimming the Ij in March, Rudi.

15 comments - Last comment @ 2025-03-17