@stdlib/ndarray-mostly-safe-casts NPM

Mostly Safe Casts

Return a list of ndarray data types to which a provided ndarray data type can be safely cast and, for floating-point data types, can be downcast.

Installation

npm install @stdlib/ndarray-mostly-safe-casts

Usage

var mostlySafeCasts = require( '@stdlib/ndarray-mostly-safe-casts' );

mostlySafeCasts( [dtype] )

If provided a dtype argument, returns a list of ndarray data types to which a provided ndarray data type can be safely cast and, for floating-point data types, can be downcast.

var out = mostlySafeCasts( 'float32' );
// e.g., returns [ 'float32', 'float64', ... ]

If not provided a dtype argument, the function returns a casting table.

var out = mostlySafeCasts();
// returns {...}

var f32 = out[ 'float32' ];
// returns {...}

var v = f32[ 'float64' ];
// returns 1

If provided an unrecognized or unsupported dtype, the function returns null.

var out = mostlySafeCasts( 'foo' );
// returns null

Examples

var dtypes = require( '@stdlib/ndarray-dtypes' );
var mostlySafeCasts = require( '@stdlib/ndarray-mostly-safe-casts' );

// Get the list of supported ndarray data types:
var DTYPES = dtypes();

// Print the list of ndarray data types to which a data type can be cast...
var list;
var i;
for ( i = 0; i < DTYPES.length; i++ ) {
    list = mostlySafeCasts( DTYPES[ i ] );
    console.log( '%s: %s', DTYPES[ i ], list.join( ', ' ) );
}

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.