The decision between MIT-like licenses and copyleft licenses all depend on the contextual usage of the code. Is it just some quick and dirty script I wrote to c

The decision between MIT-like licenses and copyleft licenses all depend on the contextual usage of the code. Is it just some quick and dirty script I wrote to convert some obscure binary format to another obscure binary format? I literally do not care who uses it and why/where/when/how. The script was complete the day I made it, it does everything it needs to do and nothing it doesn't. School assignments fall under the same category, they were useful for that moment and will never be needed again. Writing my own linked-list in C++ stopped being useful to me the moment I turned the assignment in so I don't care who uses it. It's not anything special and licensing it any other way would (in theory) only limit someone trying to learn. Did I actually write something clever that could actually be used somewhere helpful? Is it something that I can see others would want to build upon and improve? That's definitely copyleft worthy.