https://rubykaigi.org/2020-takeout/speakers#yukihiro_matz
[JA Keynote] Ruby3 and Beyond / Yukihiro "Matz" Matsumoto @yukihiro_matz
テクノロジーhttps://rubykaigi.org/2020-takeout/speakers#yukihiro_matz
テクノロジーhttps://rubykaigi.org/2020-takeout/speakers#yukihiro_matz
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