Stream transformation for Node.js

This project provides a simple object transformation framework implementing the Node.js stream.Transform API. Transformations are based on a user handler function that must be provided. It was originally developed as a part of the Node.js CSV package (npm install csv) and can be used independently.

Source code for this project is available on GitHub.

Main features

• Extends the native Node.js transform stream API
• Simplicity with the optional callback and sync API
• Pipe transformations between readable and writable streams
• Synchronous versus asynchronous user functions
• Sequential and parallel execution
• Accept object, array or JSON as input and output
• Sequential or user-defined concurrent execution
• Skip and multiply records
• Alter or clone input records
• Work nicely with the csv-generate, csv-parse and csv-stringify packages
• MIT License

Usage

Run npm install csv to install the full CSV module or run npm install stream-transform if you are only interested by this package.

The source code uses modern JavaScript features and run natively in Node 7.6+. For older browsers or older versions of Node, use the modules inside "./lib/es5".

Data is expected to be an array of records. Records may be provided in any form such as a string, an array or an object. Options can be placed in any positions.

Additional help

For usage and examples, you may refer to the "samples" folder and the "test" folder.