Using Ripper to See How Ruby Is Parsing Your Code

Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. In the past couple of months I've seen situations arise where developers aren't entirely sure how Ruby has chosen to interpret their code. Luckily, Ruby 1.9 comes with a built-in library called Ripper that can help solve the problem (there's a 1.8 version too, see later). Here, I give the 30 second rundown on what to do. A

[mooz]

Ripper: MRI 1.9 に実装された Ruby の構文解析器を利用する仕組み．Ripper.sexp((exp)

[o_show]

RubyKaigi2011で @shugomaeda さんが出したクイズと同じところでハマった！という話。こちらではRipperを使って何が起きているか理解したらしい