技術部の笹田です。フルタイム Ruby コミッタとして働いているので、明日から始まる RubyKaigi 2019 は仕事で行きます。あまり日のあたることが少ない我々の晴れの舞台です。 宣伝もかねて、RubyKaigi 中に自分がどんな仕事があるか並べてみました（クックパッド全般の話は、「クックパッド一同は、RubyKaigi 2019でみなさんにお会いできることを楽しみにしています！」 をご覧下さい）。 毎朝、クックパッドブースで「Cookpad Daily Ruby Puzzles」を紙で配付しますので、興味がある方はお持ち下さい。 1日目 11:20-「Ruby 3 Progress Report」まつもとさんの keynote 後、Ruby 3 の進捗みたいなことをご紹介します。 14:20-「Write a Ruby interpreter in Ruby for Ruby 3」
Ah, C. The best lingua franca we have… because we have no other lingua francas. Linguae franca. Surgeons general? C is fairly old — 44 years, now! — and comes from a time when there were possibly more architectures than programming languages. It works well for what it is, and what it is is a relatively simple layer of indirection atop assembly. Alas, the popularity of C has led to a number of prog
The CompCert project investigates the formal verification of realistic compilers usable for critical embedded software. Such verified compilers come with a mathematical, machine-checked proof that the generated executable code behaves exactly as prescribed by the semantics of the source program. By ruling out the possibility of compiler-introduced bugs, verified compilers strengthen the guarantees
A library that I work on often these days, meshoptimizer, has changed over time to use fewer and fewer C++ library features, up until the current state where the code closely resembles C even though it uses some C++ features. There have been many reasons behind the changes - dropping C++11 requirement allowed me to make sure anybody can compile the library on any platform, removing std::vector sub
After diving into the C language through K&R, and then studying portability (see C Portability Lessons from Weird Machines), my next challenge was to take a systematic look at the standard library. To do this I worked through P. J. Plauger’s book The Standard C Library (ISBN 978-0131315099) where he examines an implementation of all the functions. It has a chapter for each header, with background
My quest for relearning C++ started in November 2018. I have been reading + blogging + writing C++ from then. I would like to reflect on my journey a bit. Before I begin, I would like to state that this is not a language war blog post (although few parts of it might sound like). My intention and emphasis is on how all these beautiful languages converge and diverge to give healthy competition and c
My blog post on falling in love with Rust got quite a bit of attention – with many being surprised by what had surprised me as well: the high performance of my naive Rust versus my (putatively less naive?) C. However, others viewed it as irresponsible to report these performance differences, believing that these results would be blown out of proportion or worse. The concern is not entirely misplac
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