npm package: @stdlib/assert-is-between-array
Description: Test if a value is an array-like object where every element is between two values.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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</details>

# isBetweenArray

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Test if a value is an array-like object where every element is between two values.

<section class="installation">

## Installation

```bash
npm install @stdlib/assert-is-between-array
```

</section>

<section class="usage">

## Usage

```javascript
var isBetweenArray = require( '@stdlib/assert-is-between-array' );
```

#### isBetweenArray( value, a, b\[, left, right] )

Tests if a `value` is an array-like `object` where every element is between two values `a` (left comparison value) and `b` (right comparison value).

```javascript
var arr = [ 3, 4, 5 ];

var bool = isBetweenArray( arr, 3, 5 );
// returns true

bool = isBetweenArray( arr, 4, 5 );
// returns false

bool = isBetweenArray( arr, 3, 4 );
// returns false
```

By default, the function assumes that `a` and `b` are inclusive.

```javascript
var arr = [ 3, 4, 5 ];

var bool = isBetweenArray( arr, 3, 5 );
// returns true

bool = isBetweenArray( arr, 3, 5, 'closed', 'closed' );
// returns true
```

To make `a` and/or `b` exclusive, set the respective arguments to `'open'`.

```javascript
var arr = [ 3, 4, 5 ];

var bool = isBetweenArray( arr, 3, 5, 'open', 'closed' );
// returns false

bool = isBetweenArray( arr, 3, 5, 'closed', 'open' );
// returns false
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   If `a` and `b` are inclusive, the element-wise comparison is equivalent to

    ```text
    a <= v_i <= b
    ```

-   If `a` is exclusive and `b` is inclusive, the element-wise comparison is equivalent to

    ```text
    a < v_i <= b
    ```

-   If `a` is inclusive and `b` is exclusive, the element-wise comparison is equivalent to

    ```text
    a <= v_i < b
    ```

-   If `a` and `b` are exclusive, the element-wise comparison is equivalent to

    ```text
    a < v_i < b
    ```

-   If provided an empty array-like `object`, the function returns `false`.

    ```javascript
    var bool = isBetweenArray( [], 0.0, 1.0 );
    // returns false
    ```

-   If provided non-numeric values, element-wise comparisons are performed according to lexicographic order.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var randu = require( '@stdlib/random-base-randu' );
var filledarrayBy = require( '@stdlib/array-filled-by' );
var isBetweenArray = require( '@stdlib/assert-is-between-array' );

// Create an array of random numbers:
var x = filledarrayBy( 100, 'float64', randu );

// Check whether every element resides within the interval [0.01, 0.99]:
var bool = isBetweenArray( x, 0.01, 0.99 );
console.log( bool );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/assert-is-between`][@stdlib/assert/is-between]</span><span class="delimiter">: </span><span class="description">test if a value is between two values.</span>

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

<!-- /.stdlib -->

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[npm-url]: https://npmjs.org/package/@stdlib/assert-is-between-array

[test-image]: https://github.com/stdlib-js/assert-is-between-array/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/assert-is-between-array/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/assert-is-between-array/main.svg
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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/assert-is-between-array/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-between-array/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-between-array/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-between-array/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-between-array/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-between-array/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-between-array/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-between-array/main/LICENSE

<!-- <related-links> -->

[@stdlib/assert/is-between]: https://www.npmjs.com/package/@stdlib/assert-is-between

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</section>

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