planarian questions

• purpose of defn in Clojure
• thinking objectively vs. functionally [closed]
• QWidget::geometry() vs. QWidget::frameGeometry()
• scheme functions that "remember" values with let/set
• syntax of ST monad declaration
• Haskell library import syntax
• where clauses in list comprehensions
• Y combinator discussion in "The Little Schemer"
• functions as applicative functors (Haskell / LYAH)

planarian answers