dqtweb

Pyenv

Install Multiple Python Versions for Specific Project

• Home project: https://github.com/pyenv/pyenv

• Reference to: https://www.tecmint.com/pyenv-install-and-manage-multiple-python-versions-in-linux/

1. Install pyenv in Linux

dqtweb

#!/usr/bin/env python3

'''
always getting the most recent frame of a camera
================================================

Usage:
------
    freshest_camera_frame.py

dqtweb

public static List<Object> shuffleList(List<Object> list) {
        Random rand = new Random();
        // convert to array
        Object[] array = list.toArray();
        for (int i = array.length - 1; i > 0; i--) {
            // generate random number in range 0 to i
            int j = rand.nextInt(i + 1);

            // swap array[i] with array[j]
            Object temp = array[i];

dqtweb

After install zsh 

- brew update
- brew install nvm
- mkdir ~/.nvm

after in your ~/.zshrc or in .bash_profile if your use bash shell: 

    export NVM_DIR=~/.nvm
    source $(brew --prefix nvm)/nvm.sh

dqtweb

Moved to git-repository: https://github.com/denji/awesome-http-benchmark

Tools

Located in alphabetical order (not prefer)

• ab – slow and single threaded, written in C
• apib – most of the features of ApacheBench (ab), also designed as a more modern replacement, written in C
• autocannon – fast HTTP/1.1 benchmarking tool written in Node.js
• baloo – Expressive end-to-end HTTP API testing made easy, written in Go (golang)

dqtweb

const io = require('socket.io-client');

const socket = io('http://localhost:3000', {
  transportOptions: {
    polling: {
      extraHeaders: {
        'Authorization': 'Bearer abc',
      },
    },
  },

dqtweb

[Unit]
Description=Jupyter Notebook

[Service]
Type=simple
ExecStart=/home/roeyd/Notebook/.env/bin/jupyter lab --port 9090
WorkingDirectory=/home/roeyd/Notebook

[Install]
WantedBy=default.target

dqtweb

# so that you can open with excel

def addUTF8Bom(filename):
    f = codecs.open(filename, 'r', 'utf-8')
    content = f.read()
    f.close()
    f2 = codecs.open(filename, 'w', 'utf-8')
    f2.write(u'\ufeff')
    f2.write(content)
    f2.close()

dqtweb

// example, we want to sort list of objects based on an object's attribute. ex: "age"
var peopleList = [{"name": "Laura", "age":5}, {"name": "Peppa", "age": 40}, {"name": "Josh", "age":22}];
var comparision = function(a, b) { return a.age > b.age ? 1 : -1; };

dqtweb

SELECT
    type
  , count(*)
  , count(DISTINCT u)
  , count(CASE WHEN plat=1 THEN u ELSE NULL END)
  , count(DISTINCT CASE WHEN plat=1 THEN u ELSE NULL END)
  , count(CASE WHEN (type=2 OR type=6) THEN u ELSE NULL END)
  , count(DISTINCT CASE WHEN (type=2 OR type=6) THEN u ELSE NULL END)
FROM
    t