@stdlib/assert-is-between-array

About stdlib...

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.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

isBetweenArray

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

Installation

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

Usage

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).

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.

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'.

var arr = [ 3, 4, 5 ];

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

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

Notes

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

  a <= v_i <= b
  

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

  a < v_i <= b
  

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

  a <= v_i < b
  

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

  a < v_i < b
  

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

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

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

Examples

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 );

---

See Also

• @stdlib/assert-is-between: test if a value is between two values.

---

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 © 2016-2023. The Stdlib Authors.