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End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Object#!~

obj !~ other → true or false

Returns true if two objects do not match (using the =~ method), otherwise false.

See also .yaml_tag #<=> #=== also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0