def match(regexp)
      @data.map { |value| !!(value =~ regexp) }
    end
Returns an array of either none or integer values, indicating the
+regexp+ matching with the given array.

@param regexp [Regexp] A regular matching expression. For example, +/weeks/+.

@return [Array] Containing either +nil+ or integer values, according to the match with the given +regexp+

@example
dv = Daru::Vector.new(['3 days', '5 weeks', '2 weeks'])
dv.match(/weeks/)

# => [false, true, true]