compute-multiply

1.0.0 • Public • Published

Multiply

NPM version Build Status Coverage Status Dependencies

Computes an element-wise multiplication of a numeric array.

Installation

$ npm install compute-multiply

For use in the browser, use browserify.

Usage

To use the module,

var multiply = require( 'compute-multiply' );

multiply( arr, x )

Computes an element-wise multiplication of an input array. x may be either an array of equal length or a scalar.

multiply( [ 2, 1, 4, 2 ], -4 );
// returns [ -8, -4, -16, -8 ]
 
multiply( [ 2, 1, 4, 2 ], [ 1, 2, 3, 3 ] );
// returns [ 2, 2, 12, 6 ]

Examples

var multiply = require( 'compute-multiply' );
 
// Simulate some data...
var data = new Array( 100 );
 
for ( var i = 0; i < data.length; i++ ) {
    data[ i ] = Math.round( Math.random()*100 );
}
 
multiply( data, 10 );
 
console.log( data.join( '\n' ) );

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

$ node ./examples/index.js

Notes

This function mutates the input array. If mutation is undesired,

var data = [ 1, 2, 3, 4 ],
    copy = data.slice();
 
multiply( copy, 2 );

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,

$ make view-cov

License

MIT license.


Copyright

Copyright © 2014. Athan Reines.

Package Sidebar

Install

npm i compute-multiply

Weekly Downloads

93

Version

1.0.0

License

none

Last publish

Collaborators

  • kgryte