I lost all I need to develop because I started to try radically new. There ware no conventional ways to move forward. There ware no methods to look ahead clearly. I had to create an entirely new style to go little by little.

At Christmas, 2019, Ruby 2.7 was released with the brand-new IRB what I improved. Last 2 years, other Ruby committers always said to me, "Good luck. But you'll not be able to complete it". I think this is a kind of Alpinism.

In Japan, Alpinism is being done in the mountains of the Japanese Alps around Matsumoto, it is to climb higher and more difficult. There are no conventional ways to move forward. There are no methods to look ahead clearly. I'll talk to you about Alpine Programming in Ruby 2.7.