npm package: @stdlib/array-typed
Description: Create a typed array.
Author: The Stdlib Authors
Latest version: 0.3.2

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<details>
  <summary>
    About stdlib...
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</details>

# typedarray

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

> Create a typed array.

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

<!-- /.intro -->

<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/array-typed
```

</section>

<section class="usage">

## Usage

```javascript
var typedarray = require( '@stdlib/array-typed' );
```

#### typedarray( \[dtype] )

Creates a [typed array][mdn-typed-array] having a specified [data type][@stdlib/array/typed-dtypes].

```javascript
var arr = typedarray();
// returns <Float64Array>
```

By default, the output [typed array][mdn-typed-array] data type is `float64`. To specify an alternative data type, provide a [`dtype`][@stdlib/array/typed-dtypes] argument.

```javascript
var arr = typedarray( 'int32' );
// returns <Int32Array>
```

#### typedarray( length\[, dtype] )

Returns a [typed array][mdn-typed-array] having a specified `length`.

```javascript
var arr1 = typedarray( 5 );
// returns <Float64Array>[ 0.0, 0.0, 0.0, 0.0, 0.0 ]

var arr2 = typedarray( 5, 'uint8' );
// returns <Uint8Array>[ 0, 0, 0, 0, 0 ]
```

#### typedarray( typedarray\[, dtype] )

Creates a [typed array][mdn-typed-array] from another [typed array][mdn-typed-array].

```javascript
var arr1 = typedarray( [ 5.0, -3.0, 2.0 ] );
// returns <Float64Array>[ 5.0, -3.0, 2.0 ]

var arr2 = typedarray( arr1 );
// returns <Float64Array>[ 5.0, -3.0, 2.0 ]

var arr3 = typedarray( arr1, 'int32' );
// returns <Int32Array>[ 5, -3, 2 ]
```

#### typedarray( obj\[, dtype] )

Creates a [typed array][mdn-typed-array] from an array-like object or iterable.

```javascript
var arr1 = typedarray( [ 0.5, 0.5, 0.5 ] );
// returns <Float64Array>[ 0.5, 0.5, 0.5 ]

var arr2 = typedarray( [ 0.5, 0.5, 0.5 ], 'float32' );
// returns <Float32Array>[ 0.5, 0.5, 0.5 ]
```

If [`dtype`][@stdlib/array/typed-dtypes] is complex number data type and an array-like object contains interleaved real and imaginary components, the array-like object must have a length which is a multiple of two.

#### typedarray( buffer\[, byteOffset\[, length]]\[, dtype] )

Returns a [typed array][mdn-typed-array] view of an [`ArrayBuffer`][mdn-arraybuffer].

```javascript
var ArrayBuffer = require( '@stdlib/array-buffer' );
var buf = new ArrayBuffer( 32 );

var arr1 = typedarray( buf );
// returns <Float64Array>[ 0.0, 0.0, 0.0, 0.0 ]

var arr2 = typedarray( buf, 'float32' );
// returns <Float32Array>[ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ]

var arr3 = typedarray( buf, 16 );
// returns <Float64Array>[ 0.0, 0.0 ]

var arr4 = typedarray( buf, 16, 'float32' );
// returns <Float32Array>[ 0.0, 0.0, 0.0, 0.0 ]

var arr5 = typedarray( buf, 16, 1 );
// returns <Float64Array>[ 0.0 ]

var arr6 = typedarray( buf, 10, 4, 'int16' );
// returns <Int16Array>[ 0, 0, 0, 0 ]
```

</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

-   When providing a complex number array, if [`dtype`][@stdlib/array/typed-dtypes] is unspecified or the specified data type is not a complex number data type, the returned array contains interleaved real and imaginary components.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var randu = require( '@stdlib/random-base-randu' );
var typedarray = require( '@stdlib/array-typed' );

var arr = typedarray( 100, 'float64' );

var i;
for ( i = 0; i < arr.length; i++ ) {
    arr[ i ] = randu() * 100.0;
}
console.log( arr );
```

</section>

<!-- /.examples -->

<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="references">

</section>

<!-- /.references -->

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<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/array-complex128`][@stdlib/array/complex128]</span><span class="delimiter">: </span><span class="description">Complex128Array.</span>
-   <span class="package-name">[`@stdlib/array-complex64`][@stdlib/array/complex64]</span><span class="delimiter">: </span><span class="description">Complex64Array.</span>
-   <span class="package-name">[`@stdlib/array-float64`][@stdlib/array/float64]</span><span class="delimiter">: </span><span class="description">Float64Array.</span>
-   <span class="package-name">[`@stdlib/array-float32`][@stdlib/array/float32]</span><span class="delimiter">: </span><span class="description">Float32Array.</span>
-   <span class="package-name">[`@stdlib/array-int32`][@stdlib/array/int32]</span><span class="delimiter">: </span><span class="description">Int32Array.</span>
-   <span class="package-name">[`@stdlib/array-uint32`][@stdlib/array/uint32]</span><span class="delimiter">: </span><span class="description">Uint32Array.</span>
-   <span class="package-name">[`@stdlib/array-int16`][@stdlib/array/int16]</span><span class="delimiter">: </span><span class="description">Int16Array.</span>
-   <span class="package-name">[`@stdlib/array-uint16`][@stdlib/array/uint16]</span><span class="delimiter">: </span><span class="description">Uint16Array.</span>
-   <span class="package-name">[`@stdlib/array-int8`][@stdlib/array/int8]</span><span class="delimiter">: </span><span class="description">Int8Array.</span>
-   <span class="package-name">[`@stdlib/array-uint8`][@stdlib/array/uint8]</span><span class="delimiter">: </span><span class="description">Uint8Array.</span>
-   <span class="package-name">[`@stdlib/array-uint8c`][@stdlib/array/uint8c]</span><span class="delimiter">: </span><span class="description">Uint8ClampedArray.</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].

</section>

<!-- /.stdlib -->

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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/array-typed/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-typed/blob/deno/README.md
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-typed/main/LICENSE

[mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray

[mdn-arraybuffer]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer

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

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