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var crypto = require('crypto');

var WSProtocolHandler = {
    "8":{
        handshake:function(req,socket,head,callback){
            var key = req.headers["sec-websocket-key"];
            if(!key)return false;
            key += "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
            var sha1 = crypto.createHash('sha1');
            sha1.update(key);

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{
  "name": "My App",
  "version": "0.0.0",
  "main": "./web-app/index.js",
  "scripts": {
    "start": "webpack && webpack-dev-server --mode development",
    "build": "webpack"
  },
  "license": "ISC",
  "devDependencies": {

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const CopyWebpackPlugin = require('copy-webpack-plugin');
const webpack = require('webpack');
const path = require('path');

module.exports = {
    mode: 'development',
    entry: './web-app/index.js',
    output: {
        filename: '[name].bundle.js',
        path: path.resolve(__dirname, 'dist'),

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import numpy  
import pandas as pd  
import math as m
# REF : https://www.quantopian.com/posts/technical-analysis-indicators-without-talib-code

#Moving Average  
def MA(df, n):  
    MA = pd.Series(pd.rolling_mean(df['Close'], n), name = 'MA_' + str(n))  
    df = df.join(MA)  
    return df

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# update
sudo yum -y update
sudo yum -y upgrade

# enable EPEL6 by changing enabled=0 -> enabled=1
sudo vim /etc/yum.repos.d/epel.repo

# install htop
sudo yum install htop

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Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

var Article = require('../../../models/article');

Those suck for maintenance and they're ugly.

Possible solutions

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image: docker:latest

before_script:
  - apt-get update -y  # Updating the Ubuntu Docker instance.
  - python -V  # Print out python version for debugging.
  - apt install -y zip jq
  - pip install awscli --upgrade --user
  - export PATH=~/.local/bin:$PATH # Required for awscli.
  - aws --version  # Print out aws cli version for debugging.

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The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

• "Build tools for others that you want to be built for you." - Kenneth Reitz
• "Simplicity is alway better than functionality." - Pieter Hintjens

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import arrow
import boto3
import uuid
dynamodb = boto3.client('dynamodb')

some_id = uuid.uuid4()
some_time = arrow.now()

request = {
    'ConsistentRead': False,

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# Not only have we been adding wands, but our users have been adding new ones daily! Let's create a list of all the unique wand makers in our database.

db.wands.aggregate(
  {
    "$group": {
      "_id": "$maker"
    }
  }
)