Records

Records are structured data types in HypnoScript that allow you to group related data in an object.

Overview

Records are immutable data structures that can contain multiple fields with different types. They are ideal for representing entities, configurations, and structured data.

Syntax

Record Declaration

record Person {
    name: string;
    age: number;
    email: string;
    isActive: boolean;
}

Record Instantiation

induce person = Person {
    name: "Alice Johnson",
    age: 30,
    email: "alice@example.com",
    isActive: true
};

Record with Optional Fields

record User {
    id: number;
    username: string;
    email?: string;  // Optional field
    lastLogin?: number;
}

Basic Usage

Simple Record

Focus {
    entrance {
        // Define record
        record Point {
            x: number;
            y: number;
        }

        // Create record instance
        induce point1 = Point {
            x: 10,
            y: 20
        };

        // Access fields
        observe "X-Coordinate: " + point1.x;
        observe "Y-Coordinate: " + point1.y;
    }
} Relax;

Record with Different Data Types

Focus {
    entrance {
        record Product {
            id: number;
            name: string;
            price: number;
            categories: array;
            inStock: boolean;
            metadata: object;
        }

        induce product = Product {
            id: 12345,
            name: "HypnoScript Pro",
            price: 99.99,
            categories: ["Software", "Programming", "Hypnosis"],
            inStock: true,
            metadata: {
                version: "1.0.0",
                releaseDate: "2025-01-15"
            }
        };

        observe "Product: " + product.name;
        observe "Price: " + product.price + " €";
        observe "Categories: " + product.categories;
    }
} Relax;

Record Operations

Field Access

Focus {
    entrance {
        record Address {
            street: string;
            city: string;
            zipCode: string;
            country: string;
        }

        induce address = Address {
            street: "Musterstraße 123",
            city: "Berlin",
            zipCode: "10115",
            country: "Deutschland"
        };

        // Direct field access
        observe "Street: " + address.street;
        observe "City: " + address.city;

        // Dynamic field access
        induce fieldName = "zipCode";
        induce fieldValue = address[fieldName];
        observe "ZIP: " + fieldValue;
    }
} Relax;

Record Copies with Changes

Focus {
    entrance {
        record Config {
            theme: string;
            language: string;
            notifications: boolean;
        }

        induce defaultConfig = Config {
            theme: "dark",
            language: "en",
            notifications: true
        };

        // Create copy with changes
        induce userConfig = defaultConfig with {
            theme: "light",
            language: "de"
        };

        observe "Default theme: " + defaultConfig.theme;
        observe "User theme: " + userConfig.theme;
    }
} Relax;

Record Comparisons

Focus {
    entrance {
        record Vector {
            x: number;
            y: number;
        }

        induce v1 = Vector { x: 1, y: 2 };
        induce v2 = Vector { x: 1, y: 2 };
        induce v3 = Vector { x: 3, y: 4 };

        // Structural equality
        observe "v1 == v2: " + (v1 == v2);  // true
        observe "v1 == v3: " + (v1 == v3);  // false

        // Deep comparison
        induce areEqual = DeepEquals(v1, v2);
        observe "Deep comparison v1 and v2: " + areEqual;
    }
} Relax;

Advanced Record Features

Record with Methods

Focus {
    entrance {
        record Rectangle {
            width: number;
            height: number;

            // Methods in record
            suggestion area(): number {
                awaken this.width * this.height;
            }

            suggestion perimeter(): number {
                awaken 2 * (this.width + this.height);
            }

            suggestion isSquare(): boolean {
                awaken this.width == this.height;
            }
        }

        induce rect = Rectangle {
            width: 10,
            height: 5
        };

        observe "Area: " + rect.area();
        observe "Perimeter: " + rect.perimeter();
        observe "Is square: " + rect.isSquare();
    }
} Relax;

Record with Computed Fields

Focus {
    entrance {
        record Circle {
            radius: number;
            diameter: number;  // Computed from radius

            suggestion constructor(r: number) {
                this.radius = r;
                this.diameter = 2 * r;
            }
        }

        induce circle = Circle(5);
        observe "Radius: " + circle.radius;
        observe "Diameter: " + circle.diameter;
    }
} Relax;

Record with Validation

Focus {
    entrance {
        record Email {
            address: string;

            suggestion constructor(email: string) {
                if (IsValidEmail(email)) {
                    this.address = email;
                } else {
                    throw "Invalid email address: " + email;
                }
            }

            suggestion getDomain(): string {
                induce parts = Split(this.address, "@");
                if (ArrayLength(parts) == 2) {
                    awaken parts[1];
                } else {
                    awaken "";
                }
            }
        }

        try {
            induce email = Email("user@example.com");
            observe "Email: " + email.address;
            observe "Domain: " + email.getDomain();
        } catch (error) {
            observe "Error: " + error;
        }
    }
} Relax;

Record Patterns

Record as Configuration

Focus {
    entrance {
        record DatabaseConfig {
            host: string;
            port: number;
            username: string;
            password: string;
            database: string;
            ssl: boolean;
            timeout: number;
        }

        induce dbConfig = DatabaseConfig {
            host: "localhost",
            port: 5432,
            username: "admin",
            password: "secret123",
            database: "hypnoscript",
            ssl: true,
            timeout: 30
        };

        // Use configuration
        induce connectionString = "postgresql://" + dbConfig.username + ":" +
                                 dbConfig.password + "@" + dbConfig.host + ":" +
                                 dbConfig.port + "/" + dbConfig.database;

        observe "Connection string: " + connectionString;
    }
} Relax;

Record as API Response

Focus {
    entrance {
        record ApiResponse {
            success: boolean;
            data?: object;
            error?: string;
            timestamp: number;
            requestId: string;
        }

        // Successful response
        induce successResponse = ApiResponse {
            success: true,
            data: {
                userId: 123,
                name: "Alice",
                email: "alice@example.com"
            },
            timestamp: GetCurrentTime(),
            requestId: GenerateUUID()
        };

        // Error response
        induce errorResponse = ApiResponse {
            success: false,
            error: "User not found",
            timestamp: GetCurrentTime(),
            requestId: GenerateUUID()
        };

        observe "Success: " + successResponse.success;
        observe "Error: " + errorResponse.error;
    }
} Relax;

Record for Event Handling

Focus {
    entrance {
        record Event {
            type: string;
            source: string;
            timestamp: number;
            data: object;
            priority: number;
        }

        induce userEvent = Event {
            type: "user.login",
            source: "web-interface",
            timestamp: GetCurrentTime(),
            data: {
                userId: 456,
                ipAddress: "192.168.1.100",
                userAgent: "Mozilla/5.0..."
            },
            priority: 1
        };

        // Process event
        if (userEvent.type == "user.login") {
            observe "User login detected: " + userEvent.data.userId;
            LogEvent(userEvent);
        }
    }
} Relax;

Record Arrays and Collections

Array of Records

Focus {
    entrance {
        record Student {
            id: number;
            name: string;
            grade: number;
        }

        induce students = [
            Student { id: 1, name: "Alice", grade: 85 },
            Student { id: 2, name: "Bob", grade: 92 },
            Student { id: 3, name: "Charlie", grade: 78 }
        ];

        // Iterate through records
        for (induce i = 0; i < ArrayLength(students); induce i = i + 1) {
            induce student = students[i];
            observe "Student: " + student.name + " - Grade: " + student.grade;
        }

        // Filter records
        induce topStudents = ArrayFilter(students, function(student) {
            return student.grade >= 90;
        });

        observe "Top students: " + ArrayLength(topStudents);
    }
} Relax;

Record as Dictionary Value

Focus {
    entrance {
        record ProductInfo {
            name: string;
            price: number;
            category: string;
        }

        induce productCatalog = {
            "PROD001": ProductInfo { name: "Laptop", price: 999.99, category: "Electronics" },
            "PROD002": ProductInfo { name: "Mouse", price: 29.99, category: "Electronics" },
            "PROD003": ProductInfo { name: "Book", price: 19.99, category: "Books" }
        };

        // Search product by ID
        induce productId = "PROD001";
        if (productCatalog[productId]) {
            induce product = productCatalog[productId];
            observe "Product found: " + product.name + " - " + product.price + " €";
        }
    }
} Relax;

Best Practices

Record Design

Focus {
    entrance {
        // ✅ GOOD: Clear, specific records
        record UserProfile {
            userId: number;
            displayName: string;
            email: string;
            preferences: object;
        }

        // ❌ BAD: Too generic records
        record Data {
            field1: object;
            field2: object;
            field3: object;
        }

        // ✅ GOOD: Use immutable records
        induce user = UserProfile {
            userId: 123,
            displayName: "Alice",
            email: "alice@example.com",
            preferences: {
                theme: "dark",
                language: "en"
            }
        };

        // ✅ GOOD: Create copies for changes
        induce updatedUser = user with {
            displayName: "Alice Johnson"
        };
    }
} Relax;

Performance Optimization

Focus {
    entrance {
        // ✅ GOOD: Records for small, frequently used data
        record Point {
            x: number;
            y: number;
        }

        // ✅ GOOD: Sessions for complex objects with behavior
        session ComplexObject {
            expose data: object;

            suggestion processData() {
                // Complex processing
            }
        }

        // ✅ GOOD: Records for configurations
        record AppConfig {
            debug: boolean;
            logLevel: string;
            maxConnections: number;
        }
    }
} Relax;

Error Handling

Focus {
    entrance {
        record ValidationResult {
            isValid: boolean;
            errors: array;
            warnings: array;
        }

        suggestion validateEmail(email: string): ValidationResult {
            induce errors = [];
            induce warnings = [];

            if (Length(email) == 0) {
                ArrayPush(errors, "Email must not be empty");
            } else if (!IsValidEmail(email)) {
                ArrayPush(errors, "Invalid email format");
            }

            if (Length(email) > 100) {
                ArrayPush(warnings, "Email is very long");
            }

            return ValidationResult {
                isValid: ArrayLength(errors) == 0,
                errors: errors,
                warnings: warnings
            };
        }

        induce result = validateEmail("test@example.com");
        if (result.isValid) {
            observe "Email is valid";
        } else {
            observe "Email errors: " + result.errors;
        }
    }
} Relax;

Error Handling

Records can throw errors on invalid operations:

Focus {
    entrance {
        try {
            record Person {
                name: string;
                age: number;
            }

            induce person = Person {
                name: "Alice",
                age: 30
            };

            // Invalid field access
            induce invalidField = person.nonexistentField;
        } catch (error) {
            observe "Record error: " + error;
        }

        try {
            // Invalid record creation
            induce invalidPerson = Person {
                name: "Bob",
                age: "invalid"  // Should be number
            };
        } catch (error) {
            observe "Validation error: " + error;
        }
    }
} Relax;

Next Steps

• Sessions - Object-oriented programming with sessions
• Arrays - Array operations and collections
• Functions - Function definitions and calls

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Mastered records? Then learn about Sessions! ✅