未分類 [Linux🐧]Oops!! My port has already bound!! How to kill it ?
How to search the process that buinding the port? You can see it by th command! lsof -i TCP | grep 7878 /*result here*/ ...
未分類 
Rust [Rust🦀] Features Accomodating Everyday
Rust features Features of the language connect some &str variables Best way Use to_string() let str1 = "Hello, "; let st...
Dart [Flutter/Dart]My project doesn’t have `analysis_options.yaml` in the root directory
A question I could not find analysis_options.yaml in my project. And I didn't know how Flutter/Dart analyze errors and w...
Dart [Flutter/Dart💠]I read a valuable article about `null safety`
I feel hazy about 'null safety' When I review the code written by my collegue by using Dart(Flutter), I came across the ...
Swift [Swift🕊️] `guard let` must not fall through !
I believed Swift could the following code like this. Swift guard let a = a else { assert(false, "This code would be comp...
iPhone [Swift🕊️]I am implementing the app with external microphone
As usual, I asked for ChatGPT on how to be able to use external microphone in iOS. And as usual, he/she answered with a ...
WebRTC [WebRTC🌈]WebRTC unknowing memo
What is ScalabilityMode ? I asked to a Big teacher who is well known chatGPT and he/she said Me What is ScarabilityMode ...
Dart [Dart💠]Dart 3 Tips (always updating)
Switch function You can write switch function like the following code. Before Dart 3.0 final String os; switch (device) ...
daily I would like to close this blog but ….
I have planed to close this blog site but when I look my detail of my credit card. About $150 is dropped from my account...
Django [Python/Django🐍]Django Start Up settings.py
基本コマンド サーバーの起動(8080で。デフォルトは8000) python manage.py runserver 8080 プロジェクト作成 django-admin startproject project_name <path> ...