npm package: @stdlib/strided-base-unary-dtype-signatures
Description: Generate a list of unary interface signatures from strided array data types.
Author: The Stdlib Authors
Latest version: 0.2.3

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# Unary Signatures

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

> Generate a list of unary interface signatures from strided array [data types][@stdlib/strided/dtypes].

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<section class="intro">

</section>

<!-- /.intro -->

<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/strided-base-unary-dtype-signatures
```

</section>

<section class="usage">

## Usage

```javascript
var signatures = require( '@stdlib/strided-base-unary-dtype-signatures' );
```

#### signatures( dtypes1, dtypes2\[, options] )

Generates a list of unary interface signatures from strided array [data types][@stdlib/strided/dtypes].

```javascript
var dtypes = [
    'float64',
    'float32',
    'int32',
    'uint8'
];

var sigs = signatures( dtypes, dtypes );
// e.g., returns [ 'float32', 'float32', ... ]
```

The function accepts the following arguments:

-   **dtypes1**: list of supported [data types][@stdlib/strided/dtypes] for the input argument.
-   **dtypes2**: list of supported [data types][@stdlib/strided/dtypes] for the output argument.
-   **options**: options.

The function accepts the following options:

-   **enums**: `boolean` flag indicating whether to return signatures as a list of [data type][@stdlib/strided/dtypes] enumeration constants. Default: `false`.

When the `enums` options is `false`, the function returns an array of [data type][@stdlib/strided/dtypes] strings. To return [data type][@stdlib/strided/dtypes] enumeration constants, set the `enums` option to `true`.

```javascript
var dtypes = [
    'float64',
    'float32',
    'int32',
    'uint8'
];
var options = {
    'enums': true
};

var sigs = signatures( dtypes, dtypes, options );
// returns [...]
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

## Notes

-   The function returns a strided array having a stride length of `2` (i.e., every `2` elements define a unary interface signature).
-   For each signature (i.e., set of two consecutive non-overlapping strided array elements), the first element is the input data type and the second element is the return data type.
-   All signatures follow type [promotion rules][@stdlib/ndarray/promotion-rules].

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var dtypes = require( '@stdlib/strided-dtypes' );
var replace = require( '@stdlib/string-replace' );
var signatures = require( '@stdlib/strided-base-unary-dtype-signatures' );

// Get the list of supported strided array data types:
var dt = dtypes();

// Generate unary interface signatures:
var sigs = signatures( dt, dt );

// Format the output:
var str = replace( JSON.stringify( sigs ), /("[^"]+","[^"]+"),/g, '$1,\n' );
console.log( str );
```

</section>

<!-- /.examples -->

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<section class="references">

</section>

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<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/strided-base/unary-signature-callbacks`][@stdlib/strided/base/unary-signature-callbacks]</span><span class="delimiter">: </span><span class="description">assign callbacks to unary interfaces according to type promotion rules.</span>

</section>

<!-- /.related -->

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<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].

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[@stdlib/strided/dtypes]: https://www.npmjs.com/package/@stdlib/strided-dtypes

[@stdlib/ndarray/promotion-rules]: https://www.npmjs.com/package/@stdlib/ndarray-promotion-rules

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[@stdlib/strided/base/unary-signature-callbacks]: https://www.npmjs.com/package/@stdlib/strided-base-unary-signature-callbacks

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