if-stream

if-stream

Conditionally return a stream

Install

$ npm install --save if-stream

Usage

var csvParser = require('csv-parser');
var ifStream = require('if-stream');

function isCsv(data) {
	return data.toString().indexOf(',') !== -1;
}

var stream = ifStream(isCsv, csvParser);

stream.on('data', function (data) {
	console.log(data);
	//=> {foo: 'bar', unicorn: 'cat'}
});

stream.end('foo,unicorn\nbar,cat\n');

API

ifStream(condition, stream, [optionalStream], options)

condition

Required
Type: function, string, boolean or regex

Condition to match the stream buffer against.

stream

Required
Type: stream

The stream to be returned if the condition is met.

optionalStream

Type: stream

An optional stream to be returned if the condition isn't met. By default a transform stream is returned.

options

Type: object

Options to pass to peek-stream.

License

MIT © Kevin Martensson