npm package: @stdlib/random-array-tools-ternary-factory
Description: Create a factory function for generating pseudorandom values drawn from a ternary PRNG.
Author: The Stdlib Authors
Latest version: 0.2.3

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# ternaryFactory

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> Create a factory function for generating pseudorandom values drawn from a ternary PRNG.

<section class="installation">

## Installation

```bash
npm install @stdlib/random-array-tools-ternary-factory
```

</section>

<section class="usage">

## Usage

```javascript
var ternaryFactory = require( '@stdlib/random-array-tools-ternary-factory' );
```

#### ternaryFactory( prng, dtypes, dtype )

Returns a factory function for generating pseudorandom values drawn from a ternary PRNG.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, 'float64' );
// returns <Function>
```

The function has the following parameters:

-   **prng**: ternary pseudorandom number generator.
-   **dtypes**: list of supported output data types.
-   **dtype**: default output array data type.

* * *

#### factory( \[param1, param2, param3, ]\[options] )

Returns a function for generating pseudorandom values drawn from a ternary PRNG.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>
```

The function has the following parameters:

-   **param1**: first PRNG parameter.
-   **param2**: second PRNG parameter.
-   **param3**: third PRNG parameter.
-   **options**: function options.

The function supports the following options:

-   **prng**: pseudorandom number generator which generates uniformly distributed pseudorandom numbers.
-   **seed**: pseudorandom value generator seed.
-   **state**: pseudorandom value generator state.
-   **copy**: boolean indicating whether to copy a provided pseudorandom value generator state.
-   **dtype**: default output array data type. Setting this option overrides the default output array data type provided to the parent function.

If provided PRNG parameters, the function returns a partially applied function for creating arrays, which can be useful when wanting to pass around a parameterized function for array creation.

* * *

### Full Arity

#### random( len, param1, param2, param3\[, options] )

Returns an array of pseudorandom values drawn from a ternary PRNG.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var v = random( 10, 2.0, 5.0, 3.33 );
// returns <Float64Array>
```

The function has the following parameters:

-   **len**: output array length.
-   **param1**: first PRNG parameter.
-   **param2**: second PRNG parameter.
-   **param3**: third PRNG parameter.
-   **options**: function options.

The function accepts the following options:

-   **dtype**: output array data type. Setting this option overrides the default output array data type.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var v = random( 10, 2.0, 5.0, 3.33, {
    'dtype': 'float32'
});
// returns <Float32Array>
```

#### random.assign( param1, param2, param3, out )

Fills an array with pseudorandom values drawn from a ternary PRNG.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );
var zeros = require( '@stdlib/array-zeros' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var out = zeros( 10, 'float64' );
// returns <Float64Array>

var v = random.assign( 2.0, 5.0, 3.33, out );
// returns <Float64Array>

var bool = ( out === v );
// returns true
```

The method has the following parameters:

-   **param1**: first PRNG parameter.
-   **param2**: second PRNG parameter.
-   **param3**: third PRNG parameter.
-   **out**: output array.

### Partial Application

#### random( len\[, options] )

Returns an array of pseudorandom values drawn from a ternary PRNG.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory( 2.0, 5.0, 3.33 );
// returns <Function>

var v = random( 10 );
// returns <Float64Array>

v = random( 10 );
// returns <Float64Array>
```

The function has the following parameters:

-   **len**: output array length.
-   **options**: function options.

The function accepts the following options:

-   **dtype**: output array data type. Setting this option overrides the default output array data type.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory( 2.0, 5.0, 3.33 );
// returns <Function>

var v = random( 10, {
    'dtype': 'float32'
});
// returns <Float32Array>

v = random( 10, {
    'dtype': 'generic'
});
// returns [...]
```

#### random.assign( out )

Fills an array with pseudorandom values drawn from a ternary PRNG.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );
var zeros = require( '@stdlib/array-zeros' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory( 2.0, 5.0, 3.33 );
// returns <Function>

var out = zeros( 10, 'float64' );
// returns <Float64Array>

var v = random.assign( out );
// returns <Float64Array>

var bool = ( out === v );
// returns true
```

The method has the following parameters:

-   **out**: output array.

* * *

#### random.PRNG

The underlying pseudorandom number generator.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var prng = random.PRNG;
// returns <Function>
```

#### random.seed

The value used to seed the underlying pseudorandom number generator.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var seed = random.seed;
// returns <Uint32Array>
```

If the `factory` function is provided a PRNG for uniformly distributed numbers, the associated property value on the returned function is `null`.

```javascript
var minstd = require( '@stdlib/random-base-minstd-shuffle' ).normalized;
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory({
    'prng': minstd
});
// returns <Function>

var seed = random.seed;
// returns null
```

#### random.seedLength

Length of underlying pseudorandom number generator seed.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var len = random.seedLength;
// returns <number>
```

If the `factory` function is provided a PRNG for uniformly distributed numbers, the associated property value on the returned function is `null`.

```javascript
var minstd = require( '@stdlib/random-base-minstd-shuffle' ).normalized;
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory({
    'prng': minstd
});
// returns <Function>

var len = random.seedLength;
// returns null
```

#### random.state

Writable property for getting and setting the underlying pseudorandom number generator state.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var state = random.state;
// returns <Uint32Array>
```

If the `factory` function is provided a PRNG for uniformly distributed numbers, the associated property value on the returned function is `null`.

```javascript
var minstd = require( '@stdlib/random-base-minstd-shuffle' ).normalized;
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory({
    'prng': minstd
});
// returns <Function>

var state = random.state;
// returns null
```

#### random.stateLength

Length of underlying pseudorandom number generator state.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var len = random.stateLength;
// returns <number>
```

If the `factory` function is provided a PRNG for uniformly distributed numbers, the associated property value on the returned function is `null`.

```javascript
var minstd = require( '@stdlib/random-base-minstd-shuffle' ).normalized;
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory({
    'prng': minstd
});
// returns <Function>

var len = random.stateLength;
// returns null
```

#### random.byteLength

Size (in bytes) of underlying pseudorandom number generator state.

```javascript
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory();
// returns <Function>

var sz = random.byteLength;
// returns <number>
```

If the `factory` function is provided a PRNG for uniformly distributed numbers, the associated property value on the returned function is `null`.

```javascript
var minstd = require( '@stdlib/random-base-minstd-shuffle' ).normalized;
var triangular = require( '@stdlib/random-base-triangular' );

var dtypes = [ 'float64', 'float32', 'generic' ];

var factory = ternaryFactory( triangular, dtypes, dtypes[ 0 ] );
// returns <Function>

var random = factory({
    'prng': minstd
});
// returns <Function>

var sz = random.byteLength;
// returns null
```

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

* * *

## Examples

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

```javascript
var triangular = require( '@stdlib/random-base-triangular' );
var dtypes = require( '@stdlib/array-dtypes' );
var ternaryFactory = require( '@stdlib/random-array-tools-ternary-factory' );

var dt = dtypes( 'real_floating_point_and_generic' );

var factory = ternaryFactory( triangular, dt, 'float64' );
// returns <Function>

var random = factory();
// returns <Function>

var x = random( 10, 2.0, 5.0, 3.33 );
// returns <Float64Array>

x = random( 10, 2.0, 5.0, 3.33, {
    'dtype': 'float32'
});
// returns <Float32Array>

x = random( 10, 2.0, 5.0, 3.33, {
    'dtype': 'generic'
});
// returns [...]
```

</section>

<!-- /.examples -->

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

<section class="related">

</section>

<!-- /.related -->

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<section class="main-repo" >

* * *

## Notice

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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

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

</section>

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