Transform stream factory to perform scalar division on streamed numeric data values.
Note: this module is provided for semantic convenience. Its functionality is the same as flow-multiply, where the scalar (divisor) is simply its fractional equivalent; i.e., for scalar multiplication, scalar = 1/d, where d is the divisor.
$ npm install flow-divideTo create a stream factory,
vardivStream=require('flow-divide');// Create a new factory:vardStream=divStream();This method is a setter/getter. If no value is provided, returns the divisor; default is 1. To set the divisor,
dStream.divisor(10);To create a new scalar division stream,
varstream=dStream.stream();Methods are chainable.
divStream().divisor(10).stream().pipe(/* writable stream */);vareventStream=require('event-stream'),dStream=require('flow-divide');// Create some data...vardata=newArray(1000);for(vari=0;i<data.length;i++){data[i]=Math.round(Math.random()*10);}// Create a readable stream:varreadStream=eventStream.readArray(data);// Create a new scalar division stream:varstream=dStream().divisor(10).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.jsUnit 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:
$ mochaAll new feature development should have corresponding unit tests to validate correct functionality.
Copyright © 2014. Athan Reines.