@deessejs/core

Functional programming patterns for TypeScript.

Packages

Package	Description	Version
@deessejs/core	Functional programming patterns

Requirements

• TypeScript 5.0+
• Node.js 20+

Installation

# Install core
npm install @deessejs/core

# Or using pnpm
pnpm add @deessejs/core

# Or using yarn
yarn add @deessejs/core

Quick Start

import { success, cause, exception, isSuccess, isCause, isException, Outcome } from '@deessejs/core'

// Success - Normal Operation Result
const ok = success({ id: 1, name: 'John' })

if (isSuccess(ok)) {
  console.log(ok.value.name)
}

// Cause - Domain Errors
const notFound = cause({
  name: 'NOT_FOUND',
  message: 'User not found',
  data: { id: 123 }
})

// Exception - System Errors
const crash = exception({
  name: 'DATABASE_ERROR',
  message: 'Connection failed'
})

Development

# Install dependencies
pnpm install

# Build all packages
pnpm build

# Run tests
pnpm test

# Run tests with coverage
pnpm test:coverage

# Lint
pnpm lint

# Type check
pnpm typecheck

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Author

• Nesalia Inc.

Security

If you discover any security vulnerabilities, please send an e-mail to security@nesalia.com.

License

MIT License - see the LICENSE file for details.