Comment by jfengel
1 year ago
In college I worked for a company whose goal was to prove that their management techniques could get a bunch of freshman to write quality code.
They couldn't. I would go find the code that caused a bug, fix it and discover that the bug was still there. Because previous students had, rather than add a parameter to a function, would make a copy and slightly modify it.
I deleted about 3/4 of their code base (thousands of lines of Turbo Pascal) that fall.
Bonus: the customer was the Department of Energy, and the program managed nuclear material inventory. Sleep tight.
> make a copy and slightly modify it
In addition to not breaking existing code, also has added benefit of boosting personal contribution metrics in eyes of management. Oh and it's really easy to revert things - all I have to do is find the latest copy and delete it. It'll work great, promise.
I mean…when you have a pile of spaghetti, there is only so much you can do.
Ask for more staff, reorganize the team into a set of multiple teams, and hire more middle management! Win win for the manager.
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Add some meat sauce and more spaghetti :)
Spaghetti piles are where you can do the most... if you're brave enough and have agency to do so.
Immutable functions! I guess that’s one way of doing functional programming /s
Reminds me of https://www.unison-lang.org/docs/the-big-idea/
In a (very real) sense, git is an immutable data structure of immutable snapshots of code.
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pfft, that's just symbol versioning
I work with someone who has a habit of code duplication like this. Typically it’s an effort to turn around something quickly for someone who is demanding and loud. Refactoring the shared function to support the end edge case would take more time and testing, so he doesn’t do it. This is a symptom of the core problem.
I've been getting stricter about not letting that stuff into the codebase. They always say they'll clean it up later but they never do.
To paraphrase a Python saying, “master is where bad code goes to die”.
> They always say they'll clean it up later but they never do.
Are you sure there's anything needing cleaning up?
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I have a habit of doing this for data processing code (python, polars).
For other code it's an absolute stink and i agree. But for data transforms... I've seen the alternative, a neatly abstracted in-house library of abstracted combinations of dataframe operations with different parameters and.. It's the most aesthetically pleasing unfathomable hell I've ever experienced.
So now, when munging dataframes, i will be much faster to reach for 'copy that function and modify it slightly' - maintenance headache, but at least the result is readable.
But it's a false premise; the claim is that just copy/pasting something is faster, but is it really?
The demanding / loud person can and should be ignored; as a developer, you are responsible for code quality and maintainability, not your / their manager.
I agree. I always take the time to clean things up along the way, but short term thinning is often incentivized and rewarded.
> I work with someone who has a habit of code duplication like this.
Are you sure it's code duplication?
I mean, read your own description: the new function does not need to support edge cases. Having to handle edge cases is a huge code smell, and a clear sign of premature generalization.
And you even admit the guy was more productive and added less bugs?
There is a reason why the mistakes caused by naive approaches to Don't Repeat Yourself (DRY) are corrected with Write Everything Twice (WET).
I didn’t say less bugs. There are a lot of bugs, they are just localized to each call, and then copy/pasted all over the place. So when found, they need to be fixed in a bunch of places. It makes for quite the mess.
They just aren’t making changes to the shared function, so they don’t need to test existing functionality still works, just their single use case.
This reminds me of my experience. I've worked for one company based in SEA that had almost identical portals in several countries in the region. Portals were developed by an Australian company and I was hired to maintain existing/develop new portals.
Source code for each portal was stored in a separate Git repository. I've asked the original authors how am I supposed to fix bugs that affect all the portals or develop new functionality for all the portals. The answer was to backport all fixes manually to all copies of the source code.
Then I've asked: isn't it possible to use a single source repository and use feature flags to customize appearance and features of each portals. Original authors said that it is impossible.
In 2-3 months I've merged the code of 4-5 portals into one repository, added feature flags, upgraded the framework version, release went flawlessly, and it was possible to fix a bug simultaneously for all the portals or develop a new functionality available across all the countries where the company operated. It was a huge relief for me as copying bugfixes manually was tedious and error-prone process.
I once had to deal with some contractors that habitually did this, when confronted on how this could lead to confusion they said "that's what Ctrl+F is for."
Oh boy! This reminded me of one of my worst tech leads. He pushed secret tokens to github. When I asked in the team meeting why would we do this instead of using secrets manager, the response was: "These are private respos. Also we signed an NDA before joining the company"
Was this in Blacksburg by any chance?
It was indeed! Back in the late 80s. You know of it?
It was so long ago it feels half mythical to me.
> Bonus: the customer was the Department of Energy, and the program managed nuclear material inventory. Sleep tight.
These are my favorite (in a sense) programmer stories--that there's these incomprehensible piles of rubbish that somehow, like, run The World and things, and yet somehow things manage to work (in an outwardly observable sense).
Although, I recall two somewhat recent stories where this wasn't the case. The unemployment benefits fiascos during early Covid-era, and some more recent air traffic control-related things (one which effected me personally).
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