blog posts
Logging in to a website is what users do quite a lot. Suppose it is a blog site. Once a user completes a log-in process, the user is allowed to create a new post, update contents and delete a post. The blog site might have a feature to leave comments by logged-in users.
Rails 7 provides a couple of approaches to bundle a rich JavaScript application such as SPA.
To create the JavaScript application, we should specify j|--javascript option with
importmap (default), webpack, esbuild or rollup when rails new command gets run.
Although webpack is still among the choices, it has been retired as describe in the
https://github.com/rails/webpacker/blob/master/README.md.
This is the third post about securing Rails GraphQL API app. The topic is CSRF protection for GraphQL API. CSRF is an acronym of Cross-Site Request Forgery, and one of well-known vulnerabilities and a type of session hijack.
This is the second post about securing Rails GraphQL API app. Most of conceptual explanations are in the previous post, Make it Secure, GraphQL by Rails. This memo is focusing on how to add the authentication using Devise gem (https://github.com/heartcombo/devise).
These days, attacks on a web application becomes more and more common. Every web application should be protected to get rid of such attacks. Ruby on Rails provides ways to make it secure out of the box.
GraphQL is an API standard to provide resources on the server-side to various types of clients. GraphQL itself is a specification and doesn’t provide an implementation. For Ruby on Rails, GraphQL Ruby https://graphql-ruby.org/ is the most popular library.
The easiest way to create a Ruby on Rails app is absolutely to hit the command:
rails new [APP_NAME]
I used to use Datomic, https://www.datomic.com, a lot. Datomic is a unique database. The most attractive feature would be the idea of preserving transactions. Based on the transaction id, Datomic is able to pull out the past data which has been already updated later.
This post is going to be very different from what I write here. The content is a memo how I create a GCP (Google Cloud Platform) instance for Deep Learning. While I study algorithm stuff, I also have been studying Deep Learning. In my early days, I tried to train my Deep Learning model only on a laptop. My laptop is 2012 model MacBook Pro, so I would say it is reasonably fast.
Problems which ask a binary tree traverse, add/delete nodes, etc. are popular in algorithm questions. The binary trees are often just a binary tree or binary search tree. Sometimes, the problem pinpoints a particular type of binary tree, for example, a balanced binary tree or complete binary tree.
