math-float32-significand

    1.0.0 • Public • Published

    Significand

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    Returns an integer corresponding to the significand of a single-precision floating-point number.

    Installation

    $ npm install math-float32-significand

    Usage

    var significand = require( 'math-float32-significand' );

    significand( x )

    Returns an integer corresponding to the significand of a single-precision floating-point number.

    var toFloat32 = require( 'float64-to-float32' );
     
    var s = significand( toFloat32( 3.14e34 ) );
    // returns 4293751 => 10000011000010001110111
     
    = significand( toFloat32( 3.14e-34 ) );
    // returns 5288021 => 10100001011000001010101
     
    = significand( toFloat32( -3.14 ) );
    // returns 4781507 => 10010001111010111000011
     
    = significand( 0 );
    // returns 0 => 00000000000000000000000
     
    = significand( NaN );
    // returns 4194304 => 10000000000000000000000

    Examples

    var round = require( 'math-round' );
    var pow = require( 'math-power' );
    var toFloat32 = require( 'float64-to-float32' );
    var significand = require( 'math-float32-significand' );
     
    var frac;
    var exp;
    var x;
    var s;
    var i;
     
    // Generate random numbers and extract their significands...
    for ( i = 0; i < 100; i++ ) {
        frac = Math.random() * 10;
        exp = round( Math.random()*44 ) - 22;
        x = frac * pow( 10, exp );
        x = toFloat32( x );
        s = significand( x );
        console.log( 'x: %d. significand: %d.', x, s );
    }

    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

    MIT license.

    Copyright

    Copyright © 2016. The Compute.io Authors.

    Install

    npm i math-float32-significand

    DownloadsWeekly Downloads

    5

    Version

    1.0.0

    License

    MIT

    Last publish

    Collaborators

    • kgryte