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51 lines
1.6 KiB
51 lines
1.6 KiB
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def indices_sorted_by_descending_values(array)
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indices = array.each_with_index.to_a
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sorted_indices = indices.sort_by { |(element, index)| -element }
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result = sorted_indices.map { |(element, index)| index }
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result
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end
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def elements_between_first_and_second_max(array)
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max_value = array.max
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max_indices = array.each_with_index.select { |element, index| element == max_value }.map { |_, index| index }
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if max_indices.size >= 2
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first_max_index = max_indices[0]
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second_max_index = max_indices[1]
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else
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second_max_value = array.select { |element| element != max_value }.max
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return [] if second_max_value.nil?
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first_max_index = array.index(max_value)
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second_max_index = array.index(second_max_value)
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end
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first_max_index, second_max_index = [first_max_index, second_max_index].sort
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array[(first_max_index + 1)...second_max_index]
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end
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def elements_between_first_and_last_max(array)
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max_value = array.max
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first_max_index = array.index(max_value)
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last_max_index = array.rindex(max_value)
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return [] if first_max_index == last_max_index
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first_max_index, last_max_index = [first_max_index, last_max_index].sort
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array[(first_max_index + 1)...last_max_index]
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end
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# Ex
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array = [5, 3, 8, 1, 7]
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puts "Indices in order of decreasing elements:"
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puts indices_sorted_by_descending_values(array).join(", ")
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array = [5, 1, 8, 3, 8, 7]
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puts "Elements between first and second maximum:"
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puts elements_between_first_and_second_max(array).join(", ")
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array = [5, 1, 8, 3, 7, 8]
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puts "Elements between first and last maximum:"
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puts elements_between_first_and_last_max(array).join(", ") |