If I am writing code that is unusually complex or going to be hard to understand for the people who read it later (usually me!), I often add extra lines 'to sho

If I am writing code that is unusually complex or going to be hard to understand for the people who read it later (usually me!), I often add extra lines 'to show my working' as well as comments. Sometimes I add those extra lines just to have something to anchor those comments on to. The compiler will probably optimise those extra lines out, but if not, I consider it a cost worth spending to make my life (or somebody else's life) easier in the future.