Computes a moving product over an array.
$ npm install compute-mprodFor use in the browser, use browserify.
var mprod = require( 'compute-mprod' );Slides a window over an array to compute a moving product. For primitive arrays,
var data = [ 1, 2, 3, 4, 5 ];
var arr = mprod( data, 2 );
// returns [ 2, 6, 12, 20 ]For object arrays, provide an accessor function for accessing array values
var data = [
{'x':1},
{'x':2},
{'x':3},
{'x':4},
{'x':5}
];
function getValue( d ) {
return d.x;
}
var arr = mprod( data, 2, getValue );
// returns [ 2, 6, 12, 20 ]Note: the returned array has length L - W + 1, where L is the length of the input array and W is the window size.
var mprod = require( 'compute-mprod' );
// Simulate some data...
var data = new Array( 100 );
for ( var i = 0; i < data.length; i++ ) {
data[ i ] = Math.round( Math.random()*10 ) + 1;
}
// Compute the moving product:
var arr = mprod( data, 7 );
console.log( arr.join( '\n' ) );To run the example code from the top-level application directory,
$ node ./examples/index.jsUnit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:
$ make testAll new feature development should have corresponding unit tests to validate correct functionality.
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-covIstanbul creates a ./reports/coverage directory. To access an HTML version of the report,
$ make view-covCopyright © 2015. Philipp Burckhardt.