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Elk is a tiny embeddable JavaScript engine that implements a small but usable subset of ES6. It is designed for microcontroller development. Instead of writing firmware code entirely in C/C++, Elk allows to add JavaScript customisations to the firmware developed in C - which is a great way to let customers to extend/customise device functionality. Elk features include: Cross platform. Works anywhe
Masatoshi Seki is a Ruby committer and the author of several Ruby standard libraries including dRuby, ERB, and Rinda. He’s an expert in object-oriented programming, distributed systems, and eXtreme programming. He has been speaking at RubyKaigi every year since 2006 when the Kaigi first started. He is also Senior Engineer at Canon Medical Systems corp.
Rustの構造体のメモリレイアウトについてのメモ。 Rustで次のような構造体を定義したときに、構造体のメモリレイアウトはどうなるか? struct Layout { b1: u8, s1: u16, b2: u8, w1: u32, b3: u8, w2: u32, s2: u16, s3: u16, } 検証時のRustのバージョンは次の通り。 stable-x86_64-unknown-linux-gnu rustc 1.24.1 (d3ae9a9e0 2018-02-27) TL;DR 先に結論を書く。 アトリビュート指定によって構造体のメモリレイアウトとサイズは以下のように変化する。 デフォルト 構造体サイズ20Byte repr(C)アトリビュート指定 構造体サイズ24Byte repr(packed)アトリビュート指定 構造体サイズ17Byte 以下に確認の過程を残しておく。
Vedis is an embeddable datastore C library built with over 70 commands similar in concept to Redis but without the networking layer since Vedis run in the same process of the host application. Unlike most other datastores (i.e. memcache, Redis), Vedis does not have a separate server process. Vedis reads and writes directly to ordinary disk files. A complete database with multiple collections, is c
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