flow-from-string v1.0.1

from-string

Converts a string to a readable stream.

Installation

$ npm install flow-from-string

For use in the browser, use browserify.

Usage

To use the module,

var fromString = require( 'flow-from-string' );

fromString( str, options )

Returns a readable stream where each emitted datum is a character from the input string.

To convert a string to a readable stream,

var stream = fromString( 'beep' );

To set the readable stream options,

var opts = {
		'objectMode': true,
		'encoding': 'utf8',
		'highWaterMark': 8
	};

stream = fromString( 'beep', opts );

fromString.factory( options )

Returns a reusable stream factory. The factory method ensures streams are configured identically by using the same set of provided options.

var opts = {
		'objectMode': true,
		'encoding': 'utf8',
		'highWaterMark': 8
	};

var factory = fromString.factory( opts );

var streams = new Array( 10 ),
	str;

// Create many streams configured identically but reading different strings...
for ( var i = 0; i < streams.length; i++ ) {
	str = '';
	for ( var j = 0; j < 100; j++ ) {
		str += String.fromCharCode(97 + Math.floor(Math.random() * 26));
	}
	streams[ i ] = factory( str );
}

fromString.objectMode( str, options )

This method is a convenience function to create readable streams which always operate in objectMode. The method will always override the objectMode option in options.

var fromString = require( 'flow-from-string' ).objectMode;

fromString( 'beep' )
	.pipe( process.stdout );

Examples

var append = require( 'flow-append' ).objectMode,
	fromString = require( 'flow-from-string' );

// Create a string...
var str = '';
for ( var i = 0; i < 200; i++ ) {
	str += String.fromCharCode(97 + Math.floor(Math.random() * 26));
}

// Create a readable stream:
var readableStream = fromString( str );

// Pipe the data:
readableStream
	.pipe( append( '\n' ) )
	.pipe( process.stdout );

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

$ node ./examples/index.js

Tests

Unit

Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:

$ make test

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

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ open reports/coverage/lcov-report/index.html

License

MIT license.

Copyright

Copyright © 2014. Athan Reines.