add stock picker file

Author: mitch3lljones

stock-picker.rb

@@ -0,0 +1,21 @@
+def stockpicker(arr)
+ profit = 0
+ best_days = [nil,nil]
+
+ arr.each do |buy_price|
+ arr.each do |sell_price|
+ if arr.index(buy_price) < arr.index(sell_price) && profit < (sell_price - buy_price)
+ profit, best_days[0], best_days[1] = (sell_price - buy_price), arr.index(buy_price), arr.index(sell_price)
+ end
+ end
+ end
+
+ if best_days[0] != nil && best_days[1] != nil
+ p best_days 
+ p "Profit: #{profit}"
+ else
+ p "No eligible time period exists"
+ end
+end
+
+stockpicker([17,3,6,9,15,8,6,1,10])