How to check websocket connection failed

When connect to websocket from client, I encounter a problem, that is how to check websocket connection failed.

Solved: The emulator process for AVD has terminated

Today I encounter the problem when start an emulator on Android Studio, when start emulator, it report the following error:

Setup my first github workflow action

Recently I want to try auto build on the project on github, I just post a project fileupdater, which is used to update files with regular…

Check linux os version from command line

Today, I want to install git on one of the server, but I forget the os version, so I searched how to check linux os version from command…

Find file content with grep command

I want to find the text ssl_session_cache in nginx configuration folder /etc/nginx , I know the grep command can find the text in files…

Solved: nginx: [emerg] the size 10485760 of shared memory zone “le_nginx_SSL” conflicts with…

Today, I find one of my domain renew failed, and the error message is

Update file content with golang and regexp

In this article, I will describe how I have done to replace hundreds of files together with program.

Solve problem commonMain error: Expected class <classname> has no actual declaration in module…

Currently we upgrade the Android studio, and upgrade some third party libraries, and after some days, I accidentally find that the class…

Flutter gallery: import show

I am starting to read code of Flutter gallery project, there are something I am not familiar, the import show is one of them.

List folder size on current directory on Mac

List folder size

Where is the Dart SDK Path

Today I want to run flutter-folio on my machine, but it has some errors, I am trying to solve the problems, one of the problem is it report…

Return different type of data with Seald Class in Kotlin

This article describe a solution to return different type of data in one function with Sealed class.