It was proposed in 2010 and rejected by Matz in 2012: https://bugs.ruby-lang.org... | Hacker News

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		CoffeeOnWrite on Feb 16, 2016 \| parent \| context \| favorite \| on: An 'in' operator for Ruby It was proposed in 2010 and rejected by Matz in 2012: https://bugs.ruby-lang.org/issues/3845

singularity2001 on Feb 16, 2016 [–]

something went wrong between

Matz: I am neutral for this proposal.

... ...

Matz: This proposal is only for cosmetics. I don't want a new operator that does not introduce something new.

[I personally disagree and think the 'in' operator should be added]

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