Recent CodeSOD

Code Snippet Of the Day (CodeSOD) features interesting and usually incorrect code snippets taken from actual production code in a commercial and/or open source software projects.

Jan 2019

Why Is This Here?

by in CodeSOD on

Oma was tracking down a bug where the application complained about the wrong parameters being passed to an API. As she traced through the Java code, she spotted a construct like this:

Long s = foo.getStatusCode(); if (s != null) { //do stuff } else { //raise an error }

The Pair of All Sums

by in CodeSOD on

Learning about data structures- when to use them, how to use them, and why- is a make-or-break moment for a lot of programmers. Some programmers master this. Some just get as far as hash maps and call it a day, and some… get inventive.

Let’s say, for example, that you’re Jim J’s coworker. You have an object called a Closing. A Closing links two Entrys. This link is directed, so entry 1->2 is one Closing, while 2->1 is another. In real-world practice, though, two Closings that are linked together in both directions should generally be interacted with as pairs. So, 1->2 and 2->1 may not be the same object, but they’re clearly related.

Ternt Up GUID

by in CodeSOD on

UUIDs and GUIDs aren’t as hard as dates, but boy, do they get hard, don’t they. Just look at how many times they come up. It’s hard to generate a value that’s guaranteed to be unique. And there’s a lot of ways to do it- depending on your needs, there are some UUIDs that can be sorted sequentially, some which can be fully random, some which rely on hash algorithms, and so on.

Of course, that means, for example, your UUIDs aren’t sequential. Even with time-based, they’re not in sequence. They’re just sortable.

Switch the Dropdown

by in CodeSOD on

Bogdan Olteanu picked up a simple-sounding bug. There was a drop-down list in the application which was missing a few entries. Since this section of the app wasn't data-driven, that meant someone messed up when hard-coding the entries into the dropdown.

Bogdan was correct. Someone messed up, alright.

Certifiable Success

by in CodeSOD on

“Hey, apparently, the SSL cert on our web-service expired… in 2013.”

Laura’s company had a web-service that provided most of their business logic, and managed a suite of clients for interacting with that service. Those clients definitely used SSL to make calls to that web-service. And Laura knew that there were a bunch of calls to ValidateServerCertificate as part of the handshaking process, so they were definitely validating it, right?

Without Compare

by in CodeSOD on

Operator overloading is a messy prospect. In theory, it means that you can naturally extend a language so that you can operate on objects naturally. An introductory CS class might have students implement a Ratio or Fraction class, then overload arithmetic operators so you can (a + b).reduce().

In practice, it means you use the bitshift operator also as the stream insertion operator. Thanks C++.

Is Num? I'm Numb

by in CodeSOD on

"The hurrider I go, the behinder I get," is one of the phrases I like to trot out any time a project schedule slips and a PHB or PM decides the solution is either crunch or throwing more bodies at the project.

Karl had one of those bosses, and ended up in the deep end of crunch. Of course, when that happens, mistakes happen, and everything gets further behind, or you're left with a mountain of technical debt because you forgot that Integer.TryParse was a function in C#.