Ninja Parading Musically

    @stdlib/math-base-special-fast-uint32-log2
    TypeScript icon, indicating that this package has built-in type declarations

    0.0.7 • Public • Published

    Binary Logarithm

    NPM version Build Status Coverage Status

    Compute an integer binary logarithm.

    Installation

    npm install @stdlib/math-base-special-fast-uint32-log2

    Usage

    var log2Uint32 = require( '@stdlib/math-base-special-fast-uint32-log2' );

    log2Uint32( x )

    Returns an approximate binary logarithm of an unsigned 32-bit integer x.

    var v = log2Uint32( 4 >>> 0 );
    // returns 2
    
    v = log2Uint32( 8 >>> 0 );
    // returns 3
    
    v = log2Uint32( 9 >>> 0 );
    // returns 3

    Notes

    • This implementation provides a performance boost when an application requires only approximate computations for integer arguments.
    • For applications requiring high-precision, this implementation is never suitable.

    Examples

    var log2Uint32 = require( '@stdlib/math-base-special-fast-uint32-log2' );
    
    var v;
    var i;
    
    for ( i = 1; i < 101; i++ ) {
        v = log2Uint32( i >>> 0 );
        console.log( 'log2(%d) ≈ %d', i, v );
    }

    See Also


    Notice

    This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

    For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

    Community

    Chat


    License

    See LICENSE.

    Copyright

    Copyright © 2016-2022. The Stdlib Authors.

    Install

    npm i @stdlib/math-base-special-fast-uint32-log2

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    74

    Version

    0.0.7

    License

    Apache-2.0

    Unpacked Size

    40.1 kB

    Total Files

    9

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser