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var Type = {} for(var i =0, type; type =['String','Array','Number'][i++];){ (function(type){ Type['is'+type] = function(obj){ return Object.prototype.toString.call(obj) === '[object ' + type + ']'; } })(type) }; Type.isArray([]); Type.isString('abc'); var getSingle = function(fn){ var ret; return function(){ return ret || (ret = fn.apply(this, arguments)); }; }; var getScript = getSingle(function(){ return document.createElement('script'): }) var script1 = getScript(); var script2 = getScript(); console.log(script1 === script2);

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.ssh config info sample cat .ssh/config ServerAliveInterval 60 Host jp-1 HostName ip User ubuntu Port 22 IdentityFile ~/.ssh/cloud.key

deploy on Ubuntu cd project-folder apt update apt install python3 python3-pip source venv/bin/activate pip install -r requirements.txt -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com Dockerfile FROM ubuntu:focal COPY . /project-folder RUN apt-get update && apt-get install python3 python3-pip -y WORKDIR /project-folder RUN . venv/bin/activate RUN pip install -r requirements.txt -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com RUN ./app1.sh

How To Create Drag and Drop Elements with Vanilla JavaScript and HTML