Philip JF questions

Philip JF answers

• The missing << operator [duplicate]
• intersection of two strings using Java HashSet
• merge finite sorted list in Haskell
• How strict is ST
• Choosing a minimum hash size for a given allowable number of collisions
• Coq intros syntax
• Porting extensible array indexing (Ix and family) to Java
• Private access with self-bounded generics
• Writing fusible O(1) update for vector
• Haskell Tree to List - preorder traversal