Exponent
Returns an integer corresponding to the unbiased exponent of a double-precision floating-point number.
Installation
$ npm install math-float64-exponent
Usage
var exponent = ;
exponent( x )
Returns an integer
corresponding to the unbiased exponent of a double-precision floating-point number.
var exp = ;// returns 1021 => 2**1021 ~ 1e307var exp = ;// returns -1019 => 2**-1019 ~ 1e-307exp = ;// returns 1exp = ;// returns 0exp = ;// returns 1024 => 2**1024 ~ infinity
Examples
var round = ;var pow = ;var exponent = ;var frac;var exp;var x;var e;var i;// Generate random numbers and extract their exponents...for i = 0; i < 100; i++frac = Math * 10;exp = - 323;x = frac * ;e = ;console;
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.