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BooleanVector

Create a boolean vector (i.e., a one-dimensional ndarray).

Installation

npm install @stdlib/ndarray-vector-bool

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var BooleanVector = require( '@stdlib/ndarray-vector-bool' );

BooleanVector( [options] )

Returns a one-dimensional boolean ndarray.

var numel = require( '@stdlib/ndarray-numel' );

var arr = new BooleanVector();
// returns <ndarray>

var len = numel( arr );
// returns 0

The function accepts the following options:

• order: specifies whether an ndarray is 'row-major' (C-style) or 'column-major' (Fortran-style). Default: 'row-major'.
• mode: specifies how to handle indices which exceed array dimensions (see ndarray). Default: 'throw'.
• readonly: boolean indicating whether an array should be read-only. Default: false.

BooleanVector( length[, options] )

Returns a one-dimensional boolean ndarray having a specified length.

var numel = require( '@stdlib/ndarray-numel' );

var arr = new BooleanVector( 5 );
// returns <ndarray>

var len1 = numel( arr );
// returns 5

BooleanVector( obj[, options] )

Creates a one-dimensional boolean ndarray from an array-like object or iterable.

var numel = require( '@stdlib/ndarray-numel' );

var arr = new BooleanVector( [ true, false, true ] );
// returns <ndarray>

var len1 = numel( arr );
// returns 3

BooleanVector( buffer[, byteOffset[, length]][, options] )

Returns a one-dimensional boolean ndarray view of an ArrayBuffer.

var ArrayBuffer = require( '@stdlib/array-buffer' );
var numel = require( '@stdlib/ndarray-numel' );

var buf = new ArrayBuffer( 32 );

var arr1 = new BooleanVector( buf );
// returns <ndarray>

var len1 = numel( arr1 );
// returns 32

var arr2 = new BooleanVector( buf, 16 );
// returns <ndarray>

var len2 = numel( arr2 );
// returns 16

var arr3 = new BooleanVector( buf, 16, 1 );
// returns <ndarray>

var len3 = numel( arr3 );
// returns 1

Examples

var bernoulli = require( '@stdlib/random-array-bernoulli' );
var every = require( '@stdlib/ndarray-every' );
var map = require( '@stdlib/ndarray-map' );
var BooleanVector = require( '@stdlib/ndarray-vector-bool' );

// Create a vector containing random values:
var x = new BooleanVector( bernoulli( 10, 0.9 ) );

// Determine whether every element is truthy:
var v = every( x );
console.log( v.get() );

// Define a function which inverts individual values:
function invert( v ) {
    return !v;
}

// Apply function:
var y = map( x, invert );

// Determine whether every element is truthy:
v = every( y );
console.log( v.get() );

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2025. The Stdlib Authors.