Functional Vs Relational

After sweating my brain over functional programming in Prof. Daniel Friedman's class over the past several weeks, I got the chance to play with relational programming with miniKanren.

It took me some time to adjust my brain to accept the difference. Finally, I told myself

"Going to the grocer and paying for what you got is functional programming, but going to the grocer and handing over 10$ asking to give whatever that fits is logic programming"

Just a thought :)