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From: StackOverflow

To change all classes for an element:

document.getElementById("MyElement").className = "MyClass";

To add an additional class to an element:

document.getElementById("MyElement").className += " MyClass";

To remove a class from an element:

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import React, { PropTypes } from 'react';

@reactor
class Child extends React.Component {
    componentDidMount() {
        console.log('Child mounted with context reactor:', this.context.reactor);
    }
    render() {
        return <span>Child Component</span>;
    }

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The Ultimate Unit Testing Cheat-sheet

For Mocha, Chai and Sinon

using mocha/chai/sinon for node.js unit-tests? check out my utility: mocha-stirrer to easily reuse test components and mock require dependencies

---

• Sinon Chai
• Chai
• Sinon
• Mocha

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// Restify Server CheatSheet. 
// See: http://journal.gentlenode.com/node-3-restify-cheatsheet/
// More about the API: http://mcavage.me/node-restify/#server-api
// Install restify with npm install restify


// 1.1. Creating a Server.
// http://mcavage.me/node-restify/#Creating-a-Server

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# Using Python
import os, zipfile

z = zipfile.ZipFile('/databricks/driver/D-Dfiles.zip')
for f in z.namelist():
    if f.endswith('/'):
        os.makedirs(f)
        
# Reading zipped folder data in Pyspark

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How to create a Public Gist Service:

Step 0: Open Automator, New Service.

Step 1: Drag out Run Shell Script action. Pass Input to STDIN

Step 2: This code:

open `gist`

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## AVAHI is a whay of ZeroConf and the host name will be discovered by the clients in the network

sudo apt-get install avahi-daemon avahi-discover avahi-utils libnss-mdns mdns-scan

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MySQL Cheat Sheet

Help with SQL commands to interact with a MySQL database

MySQL Locations

• Mac /usr/local/mysql/bin
• Windows /Program Files/MySQL/MySQL version/bin
• Xampp /xampp/mysql/bin

Add mysql to your PATH

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Make sure ffmpeg is up-to-date:

brew update
brew upgrade ffmpeg

Convert a MOV into frames. Tweak the 2/1 if you want more or fewer frames.

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<script>
    // Based on code from https://stackoverflow.com/questions/59629947/how-do-i-load-an-external-js-library-in-svelte-sapper
    import { onMount, createEventDispatcher } from "svelte";

    const dispatch = createEventDispatcher();
    export let src;
    export let libraryDetectionObject;
    let script;

    onMount(() => {