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Ruby 4.0.0 Preview2 Released with Significant Changes

First seen 6 Jan 2026, 17:42 UTC •News.YcombinatorDevclass •31

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Ruby 4.0.0-preview2 has been released, featuring updates to Unicode version 17.0.0 and significant changes in core classes and standard libraries. The release includes 3607 files changed, with 197,451 insertions and 285,607 deletions since Ruby 3.4.0.

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