Tomoharu TsutsumiInvestigations on B-tree and B+treeChoosing the Right Database Index: Understanding B-tree vs. B+treeOct 22Oct 22
Tomoharu TsutsumiTime zone is crucial for One Time PasswordDeveloping two factor authentication, I got an error where the password didn’t pass, even though the logic was right.Sep 19Sep 19
Tomoharu TsutsumiConsider 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 7Sep 7
Tomoharu TsutsumiIs GraphQL-Ruby improving the development with Ruby on Rails?From my experienceAug 25Aug 25
Tomoharu TsutsumiHow to lock multiple resources in RoRWhen I tried to lock multiple records at one time, I noticed that the doc of Rails didn’t notice it.Jul 27Jul 27
Tomoharu TsutsumiGetting and removing the first line and the last line in unix command.Sometimes forget them, so taking a note.Jun 15Jun 15
Tomoharu TsutsumiImproved the time complexity of a real project with hashingI’m working for a software company and needed to improve the time complexity. I used “hashing strategy” and the time complexity decreased…May 31May 31