Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa I got upset. My MacBook Air was suddenly crashed and I had to wait for a long time to boot it again in a cafe. I had tried to plug an ear phone into my MacBook Air. Look at this figure: We cannot see these ports without puttin