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add?

add?(o)

Instance Public methods

Adds the given object to the set and returns self. If the object is already in the set, returns nil.

Links:

https://github.com/ruby/ruby/blob/e58d0bd393ccd114c54bc7857feff281c4643a65/lib/set.rb#L246

doc_ruby_on_rails

2015-05-14 08:50:47

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