flow-abs

Transform stream factory to map numeric data stream values to their absolute values.

Installation

$ npm install flow-abs

API

To create a stream factory,

var absStream = require( 'flow-abs' );

// Create a new factory:
var aStream = absStream();

aStream.stream()

To create a new absolute value stream,

var stream = aStream.stream();

Usage

Methods are chainable.

absStream()
	.stream()
	.pipe( /* writable stream */ );

Examples

var eventStream = require( 'event-stream' ),
	aStream = require( 'flow-abs' );

// Create some data...
var data = new Array( 1000 );
for ( var i = 0; i < data.length; i++ ) {
	data[ i ] = Math.round(Math.random()*100) - 50;
}

// Create a readable stream:
var readStream = eventStream.readArray( data );

// Create a new absolute value stream:
var stream = aStream().stream();

// Pipe the data:
readStream.pipe( stream )
	.pipe( eventStream.map( function( d, clbk ) {
		clbk( null, d.toString()+'\n' );
	}))
	.pipe( process.stdout );

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit tests use the Mocha test framework with Chai assertions.

Assuming you have installed Mocha, execute the following command in the top-level application directory to run the tests:

$ mocha

All new feature development should have corresponding unit tests to validate correct functionality.

License

MIT license.

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Copyright

Copyright © 2014. Athan Reines.