npm package: @stdlib/strided-base-meta-data-props
Description: Define non-enumerable read-only properties which expose strided array function meta data.
Author: The Stdlib Authors
Latest version: 0.2.3

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# setProps

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> Define non-enumerable read-only properties which expose strided array function meta data.

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</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/strided-base-meta-data-props
```

</section>

<section class="usage">

## Usage

```javascript
var setProps = require( '@stdlib/strided-base-meta-data-props' );
```

#### setProps( meta, dtypes, obj, bool )

Defines non-enumerable read-only properties which expose strided array function meta data.

<!-- eslint-disable array-element-newline -->

```javascript
// Define strided array function meta data:
var meta = {
    'nargs': 7,
    'nin': 1,
    'nout': 1
};

// Define the list of strided array data types:
var dtypes = [
    'float64', 'float64'
];

// Define an object/function on which to set the properties:
var obj = {};

// Set the properties:
setProps( meta, dtypes, obj, false );
```

The `meta` data argument should be an `object` with the following properties:

-   **nargs**: total number of arguments (excluding offsets).
-   **nin**: number of input strided arrays.
-   **nout**: number of output strided arrays.

The `bool` argument indicates whether the input object should describe an "ndarray" interface (i.e., an interface supporting `offset` arguments).

<!-- eslint-disable array-element-newline -->

```javascript
// Define strided array function meta data:
var meta = {
    'nargs': 7, // excludes offsets
    'nin': 1,
    'nout': 1
};

// Define the list of strided array data types:
var dtypes = [
    'float64', 'float64'
];

// Define an object/function on which to set the properties:
var obj = {};

// Set the properties:
setProps( meta, dtypes, obj, true );

// Retrieve the total number of arguments:
var nargs = obj.nargs;
// returns 9
```

</section>

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<section class="examples">

## Examples

<!-- eslint-disable array-element-newline -->

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

```javascript
var setProps = require( '@stdlib/strided-base-meta-data-props' );

// Define strided array function meta data:
var meta = {
    'nargs': 7,
    'nin': 1,
    'nout': 1
};

// Define the list of strided array data types:
var types = [
    'float64', 'float64',
    'float32', 'float32',
    'generic', 'generic'
];

// Define an object/function on which to set the properties:
var obj = {};

// Set the properties:
setProps( meta, types, obj, false );

// Retrieve strided array function data...
var nargs = obj.nargs;
// returns 7

var nin = obj.nin;
// returns 1

var nout = obj.nout;
// returns 1

var sigs = obj.types;
// returns [...]
```

</section>

<!-- /.examples -->

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* * *

## 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].

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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