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Discussion on: Understanding Ruby - Enumerable - Transformations

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Replies for: Minor comment around the one example... hands.flat_map(&:cards).map(&:to_s).join(', ') # => "S2, S3, S4, S3, S4, S5, S4, S5" E...

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Brandon Weaver •

True, and easy to forget it does that. It also flattens collections:

[[1], 2, 3, [[[4, 5], 6], 7]].join(', ')
# => "1, 2, 3, 4, 5, 6, 7"
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