Build your own Serverless tic tac toe AI using Node.js and (a little bit of) Machine Learning

WIFI
Reactor

Open123!

cd CityJS-Workshop
yarn
yarn run dev

Setup

git clone https://github.com/<YOURREPO!>/CityJS-Workshop.git

Intros

Hew Ingram

@hewingram

beapplied.com

Thomas Ankcorn

@thomasankcorn

BAE Systems AI

LNUG

A friendly monthly meetup for people using Node.js for fun or profit.

lnug.org

We are Software Engineers... not data scientists

Important caveat

cd CityJS-Workshop
yarn
yarn run dev
git clone https://github.com/<YOURREPO!>/CityJS-Workshop.git

Setup

 

 

 

Let's deploy your fork of the app to netlify.com

 

- Quickly Deploy to their global CDN

- Deploy golang or node.js functions as a service

- Super simple

- Great developer experience

 

Deployment

Step 1 - adding an endpoint

In

src-functions/test.js

add

exports.handler = function(event, context, callback) {
    console.log('hello world')
    callback(null, {
    statusCode: 200,
    body: "Hello, World"
    });
}

Netlify will build this into an endpoint available at

/test

Step 2 - make the endpoint mildly interesting

The board is stored as an array of length 9

Is stored as: 

[1, -1, 0, 1, 1, 0, -1, 0, 0]

Try making the endpoint return back the "next move" (but lets just make the next move be the first available space)

Step 3 - training the neural network

Machine learning made SUPER simple

yarn add brain.js

Step 3 - training the neural network

const net = new brain.NeuralNetwork();
 
net.train([{input: { r: 0.03, g: 0.7, b: 0.5 }, output: { black: 1 }},
           {input: { r: 0.16, g: 0.09, b: 0.2 }, output: { white: 1 }},
           {input: { r: 0.5, g: 0.5, b: 1.0 }, output: { white: 1 }}]);
 
const output = net.run({ r: 1, g: 0.4, b: 0 });

Step 4 - make your endpoint return a better next move

exports.handler = function(event, context, callback) {
    const board = JSON.parse(event.body)
    const output = net.run(board);


    callback(null, {
    statusCode: 200,
    body: output
    });
}
<div @click="things">
    I do things when clicked
</div>

Step 5 - make the mode toggle do something

Hook a function up to the click event

modeSwitch() {
    this.resetGame()
    this.mode = this.mode === "2Player" ? "ai" : "2Player"
}

Define a toggle function

BUT the data isn't there!

export async function getAIMove(board) {
  return post('/.netlify/functions/neuralNet', board);
}

Step 6 - get the next move from the backend

Call the endpoint

handleClick: function(position) {
                ...

               if(this.mode === 'ai'){
                    // do cool AI stuff
                }

                if(this.win()) {
                    return
                }
                this.$emit("turnSwitch");
            }
        }

Modify the handleClick function to use it

Step 7 - revel in the powerful AI you've created

Or.... not

Workshop

By hewingram

Workshop

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