Ruby: map, select and reduce
A short, tested Ruby example for map, select and reduce. Copy it and adjust the names and paths for your project.
Ruby
nums = [1, 2, 3, 4]
nums.map { |n| n * 2 } # [2, 4, 6, 8]
nums.select(&:even?) # [2, 4]
nums.reduce(0) { |a, n| a + n } # 10Find it in Zest
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