@stdlib/assert-is-boxed-primitive
v0.2.2
Published
Test if a value is a JavaScript boxed primitive.
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isBoxedPrimitive
Test if a value is a JavaScript boxed primitive.
Installation
npm install @stdlib/assert-is-boxed-primitive
Usage
var isBoxedPrimitive = require( '@stdlib/assert-is-boxed-primitive' );
isBoxedPrimitive( value )
Tests if a value
is a JavaScript boxed primitive.
var Boolean = require( '@stdlib/boolean-ctor' );
var bool = isBoxedPrimitive( new Boolean( false ) );
// returns true
bool = isBoxedPrimitive( true );
// returns false
Notes
Boxed primitive objects can be created with one of the following:
new Boolean()
new Number()
new String()
Object( Symbol() )
(ES6/ES2015)
Examples
var Boolean = require( '@stdlib/boolean-ctor' );
var Number = require( '@stdlib/number-ctor' );
var isBoxedPrimitive = require( '@stdlib/assert-is-boxed-primitive' );
var bool = isBoxedPrimitive( new Boolean( false ) );
// returns true
bool = isBoxedPrimitive( new String( 'beep' ) );
// returns true
bool = isBoxedPrimitive( new Number( 3.14 ) );
// returns true
bool = isBoxedPrimitive( false );
// returns false
bool = isBoxedPrimitive( 0 );
// returns false
bool = isBoxedPrimitive( '' );
// returns false
bool = isBoxedPrimitive( null );
// returns false
bool = isBoxedPrimitive( void 0 );
// returns false
bool = isBoxedPrimitive( [] );
// returns false
bool = isBoxedPrimitive( {} );
// returns false
See Also
@stdlib/assert-is-primitive
: test if a value is a JavaScript primitive.
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
License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.