Especially when you have problem A at work, then some time later write "generic code" that solves problem A, then some time later "import" the code to your dayjob to solve problem A. And double so if nobody else ever uses this generic code and you never use it for anything else.
As an industry we talk a lot about flexibility, particularly in scheduling and when we do our work, but you can't have it both ways. You can't be doing laundry and mowing the lawn and going grocery shopping in the middle of the work day because it helps you think or it helps your programming process, but then make the argument that because you wrote this code at 6 PM on a Sunday it's yours and not your employers, when you committed it to your employer's git repo Monday morning. Not with a straight face, at least.
I want to be clear, I'm all about getting shit done during the day. If I need to get a haircut at 2:30 PM, I will. But I'm also not pretending that my employer's code is mine or that I have any right to publish it.
