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isArrayLength

Test if a value is a valid array length.

Installation

npm install @stdlib/assert-is-array-length

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 isArrayLength = require( '@stdlib/assert-is-array-length' );

isArrayLength( value )

Tests if a value is a valid array length.

var bool = isArrayLength( 5 );
// returns true

bool = isArrayLength( -1 );
// returns false

bool = isArrayLength( 2.0e200 );
// returns false

bool = isArrayLength( 3.14 );
// returns false

bool = isArrayLength( null );
// returns false

Notes

• A valid length property for an Array is any integer value on the interval [0, 2^32-1].

Examples

var isArrayLength = require( '@stdlib/assert-is-array-length' );

var bool = isArrayLength( 5 );
// returns true

bool = isArrayLength( 0 );
// returns true

bool = isArrayLength( 2.0e200 );
// returns false

bool = isArrayLength( 5.256 );
// returns false

bool = isArrayLength( 1.0/0.0 );
// returns false

bool = isArrayLength( -1.0/0.0 );
// returns false

bool = isArrayLength( NaN );
// returns false

bool = isArrayLength( '5' );
// returns false

bool = isArrayLength( null );
// returns false

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See Also

• @stdlib/assert-is-array: test if a value is an array.

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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 © 2016-2024. The Stdlib Authors.