'A newbie learning RUBY: Needs to implement the wrap_array_elements method in class Formatter

Needs to implement a wrap_array_elements method that takes in an array and two args for the left and right side wrapping and returns a new array with a string containing the "wrapped" version of each element.

Example arguments: [5, 6, 7, 8, 9], "<<", ">>"

Should returns an array: ["<<5>>", "<<6>>", "<<7>>", "<<8>>", "<<9>>"]

class Formatter

    def wrap_array_elements(elements, left, right)
        @elements= elements
        @left = left
        @right = right
        formatted_array = Array.new
        formatted_array.push(elements.map {|element| @left + item + @right})
        puts "#{formatted_array}"
    end

end
arraysruby


Solution 1:[1]

It is much simpler than that, you just need to produce a new array from the original one with map.

class Formatter
  def wrap_array_elements(elements, left, right)
    elements.map {|element| "#{left}#{element}#{right}"}
  end
end

Solution 2:[2]

Or, instead of using string interpolation like in javiyu's solution, you can use Array.join:

class Formatter
  def wrap_array_elements(elements, left, right)
    elements.map { |element| [left, element, right].join }
  end 
end

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 javiyu
Solution 2 Stefan

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