Typed-Patterns

Basic design patterns for TypeScript.

Documentation

This project is under development and may make breaking changes in minor versions until 1.0.

Installation

npm install typed-patterns

Patterns

Behavioral

• Synchronous and asynchronous chain-of-responsibility. See examples in source/examples/behavioral/chain-of-responsibility

Utilities

Asynchronous helpers

• success(callback, ...result) calls specified callback as successful with array of results
• fail(callback, error) calls specified callback as failed with specified error
• join(onSuccess, onError) builds classical callback function from two success-callback and error-callback
• wrapCallback(callback) builds callback function that wraps array of success results into single tuple
• unwrapCallback(callback) builds callback function that unwraps single tuple to an array of success results
• wrapWorker(worker) builds asynchronous worker function that wraps array of results into single tuple
• unwrapWorker(worker) builds asynchronous worker function that unwraps single result to an array of results
• collect(workersCollection) builds asynchronous worker that collects results from all passed workers
• guardAsyncProcessor(guard, processor) builds asynchronous processor responsible only for type-guarded context

Promise helpers

• guardPromiseProcessor(guard, processor) builds asynchronous processor responsible only for type-guarded context

Unexpected context exception helpers

• class Unexpected Base class of unexpected context exception
• unexpected(message?, callback?, next?) Calls next (if specified) or passes Unexpected exception to callback (if specified)