Given an array and a number , how do I find that sum of any consecutive array elements equals the number?

search-sum.rb

def search(array, sum, expected, head, tail)
    if head > tail
        return false
    elsif sum == expected
        return [head, tail]
    else
        return (search(array, sum - array[head], expected, head+1, tail) or search(array, sum - array[tail], expected, head, tail-1))
    end
end

def search_sum(array, expected)
    sum = array.inject(0){|sum,x| sum + x }

    result = search(array, sum, expected, 0, array.length-1)
    if result
        head_, tail = result
        return array[head_..tail]
    end
end
    

print(search_sum([1, 3, 4, 5, 2], 12))
print("\n")