Certainly! Let's break down the provided code snippets:

1. What is it and why is it used?

In Mongoose, a schema is a blueprint for defining the structure of documents within a collection. When you define a schema, you can also attach methods to it. These methods become instance methods, meaning they are available on the individual documents (instances) created from that schema.

Instance methods are useful for encapsulating functionality related to a specific document or model instance. They allow you to define custom behavior that can be executed on a specific document. In the given example, the findSimilarTypes method is added to instances of the Animal model, making it easy to find other animals of the same type.

2. Syntax:

Using methods object directly in the schema options:

javascript const animalSchema = new Schema( { name: String, type: String }, { methods: { findSimilarTypes(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); } } } );

Using methods object directly in the schema:

javascript animalSchema.methods.findSimilarTypes = function(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); };

Using Schema.method() helper:

javascript animalSchema.method('findSimilarTypes', function(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); });

3. Explanation in Simple Words with Examples:

Why it's Used:

Imagine you have a collection of animals in your database, and you want to find other animals of the same type. Instead of writing the same logic repeatedly, you can define a method that can be called on each animal instance to find similar types. This helps in keeping your code DRY (Don't Repeat Yourself) and makes it easier to maintain.

Example:

```javascript const mongoose = require('mongoose'); const { Schema } = mongoose;

// Define a schema with a custom instance method const animalSchema = new Schema({ name: String, type: String });

// Add a custom instance method to find similar types animalSchema.methods.findSimilarTypes = function(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); };

// Create the Animal model using the schema const Animal = mongoose.model('Animal', animalSchema);

// Create an instance of Animal const dog = new Animal({ type: 'dog', name: 'Buddy' });

// Use the custom method to find similar types dog.findSimilarTypes((err, similarAnimals) => { console.log(similarAnimals); }); ```

In this example, findSimilarTypes is a custom instance method added to the Animal schema. When you create an instance of the Animal model (e.g., a dog), you can then call findSimilarTypes on that instance to find other animals with the same type. The method uses the this.type property, which refers to the type of the current animal instance. This allows you to easily reuse the logic for finding similar types across different instances of the Animal model.

Design for Resilience

Exploring how we imagine, design, and build the future together.

The Art of Noticing

This is a compilation of articles that I had written as a way to process the changes I was observing in the world and, consequently, in myself as a reaction to the events. I have come to think of this process as the art of noticing. This process is in contrast to the expectation that I should be a productive member of society, a target market, and a passive audience for charismatic leaders: celebrities, billionaires, and politicians.

• Social: fame
• Economic: wealth
• Political: power

An Agent of Change

To become an agent of change is to recognize that we are not separate, we are not individuals, we are not cogs in a machine. We are complex and diverse. We are designers. We are a creative, collective, self-organizing, learning community.

We are in a process of becoming—a being journey:

• Personal resilience
• Social influence
• Economic capacity
• Political agency
• Ecological harmony

This is how we shift from an attention economy to an intention economy. Rather than being oriented toward the failures of the past, the uncertainty of the present, or the worries of the future, in a constant state of anxiety, stress, and fear, we are shifting our consciousness to manifest our intention through perception (senses), cognition (mind), emotion (heart), and action (body). We are exploring how we imagine, design, and build the future together.

We are the builders collective.

We are one.

If the Bauhaus existed today, what would it look like?

What would the Bauhaus do differently, learning from the mistakes of the past and how modernism was co-opted by neoliberal capitalism.