Advanced Topics In Programming Languages: Closures For Java
講演者：Neal Gafter
講演日：2007年1月17日

7:14-
クロージャとは（定義）
A closure is a function that refers to free variables in its lexical context.
A function is a block of code with parameters. It may produce a result value.
A free variable is an idenfifier used but not defined by the closure.