Tomoharu Tsutsumi – Medium

Tomoharu Tsutsumi

How to revert in git (already pushed)

Took notes

Nov 23

Nov 23

Investigations on B-tree and B+tree

Choosing the Right Database Index: Understanding B-tree vs. B+tree

Oct 22

Investigations on B-tree and B+tree

Oct 22

Time zone is crucial for One Time Password

Developing two factor authentication, I got an error where the password didn’t pass, even though the logic was right.

Sep 19

Time zone is crucial for One Time Password

Sep 19

Consider about where to store an endpoint before deciding to use API gateway.

I have been studying AWS recently, and I managed to come up with an idea of a service. However, I gave it up. I’ll summarize the story.

Sep 7

Consider about where to store an endpoint before deciding to use API gateway.

Sep 7

Is GraphQL-Ruby improving the development with Ruby on Rails?

From my experience

Aug 25

Is GraphQL-Ruby improving the development with Ruby on Rails?

Aug 25

How to lock multiple resources in RoR

When I tried to lock multiple records at one time, I noticed that the doc of Rails didn’t notice it.

Jul 27

How to lock multiple resources in RoR

Jul 27

Tribonacci Sequence in Dynamic Programming

Enhancing DP skill

Jul 7

Tribonacci Sequence in Dynamic Programming

Jul 7

Getting and removing the first line and the last line in unix command.

Sometimes forget them, so taking a note.

Jun 15

Getting and removing the first line and the last line in unix command.

Jun 15

Improved the time complexity of a real project with hashing

I’m working for a software company and needed to improve the time complexity. I used “hashing strategy” and the time complexity decreased…

May 31

Improved the time complexity of a real project with hashing

May 31

How to test one page in Go.

There might be better ways.

May 18

How to test one page in Go.

May 18

Tomoharu Tsutsumi

Tomoharu Tsutsumi

Senior Software Engineer at two industry-leading startups ( Go | Ruby | TypeScript | JavaScript | Gin | Echo | Rails | React | Redux | Next)

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