gistfile1.txt

def prime?(x)
[9] pry(main)*   root = square(x, 0.0001)  
[9] pry(main)*   a = 2..(root)  
[9] pry(main)*   a.each do |i|    
[9] pry(main)*     return false if x % i == 0      
[9] pry(main)*   end  
[9] pry(main)*   true
[9] pry(main)* end  
=> :prime?
[10] pry(main)> prime?(5)
=> true


#question 2
def pro_array(arr)
    pro_a = arr.inject(1){ |product,i| i == 0 ? product * 1 : product * i }
    new_arr = []
    if arr.count(0) == 1
      arr.each {|i| i == 0 ? new_arr.push(pro_a): new_arr.push(0)}
    elsif arr.count(0) > 1
      arr.each {|i|  new_arr.push(0)}
    else
      arr.each { |i| new_arr.push( pro_a / i)
      }
    end
new_arr

end