Add some examples from presentation slides

examples/activeRecord.js

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+const mongoose = require('mongoose');
+
+const Schema = mongoose.Schema;
+
+const UserSchema = new Schema({
+  name: { type: String, default: '' },
+  email: { type: String, default: '' },
+  role: { type: String, enum: ['USER', 'ADMIN'] },
+});
+
+UserSchema.pre('save', function(next) {
+  if (!this.isNew) return next();
+
+  if (this.role != 'ADMIN' && this.email.endsWith('@admins.com')) {
+    next(new Error('Only admins can use @admins.com emails'));
+  } else {
+    next();
+  }
+});
+
+UserSchema.methods = {
+  isAdmin: function() {
+    return this.role === 'ADMIN';
+  },
+};
+
+UserSchema.statics = {
+  findByEmail: function(email) {
+    return this.findOne({ email });
+  },
+};
+
+mongoose.model('User', UserSchema);

examples/framework.txt

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+/src
+    /controllers
+        /user.js
+        /company.js
+        /product.js
+        /cart.js
+    /views
+        /user.js
+        /company.js
+        /product.js
+        /cart.js
+    /models
+        /user.js
+        /company.js
+        /product.js
+        /cart.js
+
+
+
+

examples/inversionOfControl/bad.js

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+const dbClient = require('dbClient');
+const notificationService = require('notificationService');
+
+async function someUseCase() {
+  const account = await dbClient.collection('accounts').findOne({
+    _id: 'someId',
+  });
+
+  if (account.type === 'USER') {
+    notificationService.sendNotification(account);
+  }
+}
+
+module.exports = {
+  someUseCase,
+};

examples/inversionOfControl/good.js

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+module.exports = ({
+  accountCollection: { findAccount },
+  notificationService: { sendNotification },
+}) => {
+  async function someUseCase() {
+    const account = await findAccount({
+      _id: 'someId',
+    });
+
+    if (account.type === 'USER') {
+      sendNotification(account);
+    }
+  }
+
+  return {
+    someUseCase,
+  };
+};