Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa In method parameter, we can write any kind of assignment statements in Ruby. The most popular default parameter is literals: def f(a, b = :aaa) ... end Rarely we can see method calls in default parameter: def f(a, b = Array.ne