I mostly program in C#, python and JavaScript. By mostly I mean slightly more than half the time. The rest is old C++, old Java, old Perl, BASH, etc. I gave up

I mostly program in C#, python and JavaScript. By mostly I mean slightly more than half the time. The rest is old C++, old Java, old Perl, BASH, etc. I gave up a long time ago trying to remember the APIs/Libraries for all of those. Most programming is doing something slightly different to some other thing you have done before. I make it a point to remember how I do things, so that no matter the language, I can get it done. This also helps tremendously with estimates.