Django Pessimistic Locking (悲觀鎖定)
when select task by id, the database lock the record. if other one to do same time the second one will get the “Task is already claimed or completed” We …
Technical sharing by programmers
when select task by id, the database lock the record. if other one to do same time the second one will get the “Task is already claimed or completed” We …
^: indicating the begin $: indicateing the last [0-9]{4}: 4 characters and each character is 0~9. (?P<by_date>…….), will pass the value as by_date parameter to the view. r preceding the …
cd ~ mkdir practice_folder #create a virtualenv python -m venv .venv .venv\scripts\activate.bat pip install django~=4.0.0 psycopg2-binary~=2.9.9 django-admin startproject django_project . python manage.py runserver 0.0.0.0:8000 pip freeze > requirements.txt create a …
if you have pyenv Dockerfile, you can use docker built -t django:latest . to build a docker image. command: docker run –rm -p 8000:8000 -p 3000:3000 -v c:\Users\Fluber\Project\Docker\django\book_django_beginners\:/home/fluber/code -it django:latest …
FROM ubuntu:20.04 ENV TZ = Asia\Taipei ENV DEBIAN_FRONTEND=noninteractive RUN apt-get update && \apt-get install -y \build-essential \libssl-dev \zlib1g-dev \libbz2-dev \libreadline-dev \libsqlite3-dev \wget \curl \llvm \libncurses5-dev \libncursesw5-dev \xz-utils \tk-dev \libffi-dev \liblzma-dev …
使用xode打開 ios > project.xcworkspace,如下圖所示新建資料夾Fonts。再將node_modules > react-native-vector-icons > Fonts >Ionicons.ttf 檔案拖拉到xcode專案中的Fonts資料夾下。 在下圖XCode專案中的Info中,新建Fonts provided by application類別,並在此類別下新增一個Item 0值為Ionicons.ttf 下方Tab的圖示就可以正常顯示。
執行指令∶ curl -s “https://get.sdkman.io” | bash 下列Statement將會加入~/.zshrc中 查詢可安裝的Java版本 安裝Java sdk install java Identifier (上表最後一欄的值) 切換Java版本 sdk use java Identifier
作業環境∶ OSX,Homebew 安裝指令∶brew install nvm 執行指令:nvm -h, 瞭解nvm 命令功能 執行指令:nvm ls-remote –lts, 查詢官網長期維護版本 執行指令∶ nvm install v16.20.2 執行指令:nvm ls, 查詢目前電腦系統上所安裝的版本清單及正在使用的是那個版本 執行指令:nvm use, 指定所要使用的版本