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My first post

I will write something about the programming what I learn or try in English.

Because I have learned TypeScript, Angular, etc, I will  write about them first.

All of the posts are just for myself. But I hope they also will be useful for someone :)


If you want, you can write  some comments in English, Japanese, or Chinese.

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[PostgreSQL] Play with TypeORM 1

Intro This time, I tried accessing Database by TypeORM. Because I wanted to manage Database tables by ORM, I created a table first.  GitHub - typeorm/typeorm   TypeORM - Amazing ORM for TypeScript and JavaScript (ES7, ES6, ES5). Installation and creating a project Installation TypeORM needed "reflect-metadata" and database driver. npm install --save typeorm reflect-metadata pg typescript tsc npm install --save-dev @types/node And I also installed "ts-node" to skip compiling. npm install --save ts-node Preparing References I could generate a TypeORM project by TypeORM command. npx typeorm init --name gen-typeorm-sample --database postgres I refered Most of all settings from it. Adding files and folders First, I added tsconfig.json. npx tsc --init And I edited like below. tsconfig.json { "compilerOptions": { /* Basic Options */ "incremental": true, "target": "es5", "module": "comm...
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[Angular][ASP.NET Core] Upload chunked files

Intro I wanted to send files to Web application (made by ASP.NET Core). If the file size had been small, I didn't need do any special things. But when I tried to send a large file, the error was occurred by ASP.NET Core's limitation. Though I could change the settings, but I didn't want to do that, because I hadn't known the file sizes what would been actually using. So I splitted the data into chunks first, and sent them. After receiving all chunks, I merged them into one file. There might be some libraries or APIs (ex. Stream API) what did them automatically, but I couldn't find them. What I did [ASP.NET Core] Make CORS enabled [Angular] Split a large file into chunks [Angular][ASP.NET Core] Send and receive data as form data [ASP.NET Core] Merge chunks into one file [ASP.NET Core] Make CORS enabled Because the client side application(Angular) and the server side application(ASP.NET Core) had been separated, I had to make CORS(Cross-Origin Requests) ...
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[TypeScript] Try React 1

Intro This time I tried React. First, I referred Documents and Tutorial. React – A JavaScript library for building user interfaces GitHub - facebook/react: A declarative, efficient, and flexible JavaScript library for building user interfaces. Getting started with React - Learn web development | MDN Create a project To create a new React project, I used "Create React App". GitHub - facebook/create-react-app: Set up a modern web app by running one command. It created these files. .git node_modules public L favicon.ico L index.html L logo192.png L logo512.png L manifest.json L robots.txt src L App.css L App.test.tsx L App.tsx L index.css L index.test.tsx L index.tsx L logo.svg L react-app-env.d.ts L serviceWorker.ts L setupTests.ts .gitignore package.json package-lock.json README.md tsconfig.json Make the page work with IE11 I could view the page by "npm start" or "npm run start".   ...
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