@stdlib/ndarray-base-unary-output-dtype NPM

unaryOutputDataType

Resolve the output ndarray data type for a unary function.

Installation

npm install @stdlib/ndarray-base-unary-output-dtype

Usage

var unaryOutputDataType = require( '@stdlib/ndarray-base-unary-output-dtype' );

unaryOutputDataType( dtype, policy )

Resolves the output ndarray data type for a unary function according to a data type policy.

var dt = unaryOutputDataType( 'int32', 'floating_point' );
// returns 'float64'

If policy is a data type, the function always returns the policy value (i.e., the second argument).

var dt = unaryOutputDataType( 'float32', 'float64' );
// returns 'float64'

dt = unaryOutputDataType( 'int32', 'float64' );
// returns 'float64'

// ...

Examples

var naryFunction = require( '@stdlib/utils-nary-function' );
var map2 = require( '@stdlib/utils-map2' );
var unzip = require( '@stdlib/utils-unzip' );
var cartesianProduct = require( '@stdlib/array-base-cartesian-product' );
var dtypes = require( '@stdlib/ndarray-dtypes' );
var logEach = require( '@stdlib/console-log-each' );
var unaryOutputDataType = require( '@stdlib/ndarray-base-unary-output-dtype' );

// Get the list of real-valued data types:
var dt = dtypes( 'real' );

// Define a list of output data type policies:
var policies = [
    'default',
    'real',
    'floating_point',
    'complex_floating_point'
];

// Generate dtype-policy argument pairs:
var args = cartesianProduct( dt, policies );

// Unzip the argument pair array:
args = unzip( args );

// Resolve output data types:
var out = map2( args[ 0 ], args[ 1 ], naryFunction( unaryOutputDataType, 2 ) );

// Print results:
logEach( 'dtypes: (%10s, %10s). policy: %s.', args[ 0 ], out, args[ 1 ] );

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.

@stdlib/ndarray-base-unary-output-dtype v0.2.1