[aleph_minus_one]

> For something like and ODE solver you need to have a really solid understanding of what data structures you will use,and solid general knowledge of the numerical methods you want to implement.

For basically every thing you program, you need to have a really solid understanding of what data structures you will use, and solid general knowledge of the methods you want to implement.

I claim that as a conservative estimate at least 90 % (likely more than 95 %) of what I code at work (and even more for what I code privately) is of this kind.