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Recursive flatten array
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| # frozen_string_literal: true | |
| def flatten_array(array) | |
| raise ArgumentError unless array.class == Array | |
| flattened = [] | |
| array.each do |item| | |
| if item.class == Array | |
| flattened += flatten_array(item) | |
| else | |
| flattened << item | |
| end | |
| end | |
| flattened | |
| end | |
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