JarCastingAbsolute Value
Computes an absolute value.
The absolute value is defined as
Installation
$ npm install math-abs
Usage
var abs = require( 'math-abs' );
abs( x )
Computes an absolute value.
var val = abs( -1 );
// returns 1
val = abs( 2 );
// returns 2
val = abs( 0 );
// returns 0
val = abs( -0 );
// returns 0
Examples
var abs = require( 'math-abs' );
var rand;
var sign;
var i;
for ( i = 0; i < 100; i++ ) {
rand = Math.round( Math.random() * 100 ) - 50;
sign = Math.random();
if ( sign < 0.5 ) {
sign = -1;
} else {
sign = 1;
}
console.log( 'Before: %d. After: %d.', rand, abs( rand ) );
}
To run the example code from the top-level application directory,
$ node ./examples/index.js
Tests
Unit
This repository uses tape for unit tests. 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
Browser Support
This repository uses Testling for browser testing. To run the tests in a (headless) local web browser, execute the following command in the top-level application directory:
$ make test-browsers
To view the tests in a local web browser,
$ make view-browser-tests
License
Copyright
Copyright © 2016. The Compute.io Authors.
