Buffer Data Type

Return the data type of an ndarray data buffer.

Installation

npm install @stdlib/ndarray-base-buffer-dtype

Alternatively,

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For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

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To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var dtype = require( '@stdlib/ndarray-base-buffer-dtype' );

dtype( buffer )

Returns the data type of an ndarray data buffer.

var Float64Array = require( '@stdlib/array-float64' );
var buf = new Float64Array( 10 );

var dt = dtype( buf );
// returns 'float64'

If provided an ndarray data buffer having an unknown or unsupported data type, the function returns null.

var dt = dtype( 'beep' );
// returns null

Examples

var dtypes = require( '@stdlib/ndarray-dtypes' );
var bufferCtors = require( '@stdlib/ndarray-base-buffer-ctors' );
var isFunction = require( '@stdlib/assert-is-function' );
var dtype = require( '@stdlib/ndarray-base-buffer-dtype' );

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

// Buffer length:
var len = 10;

// For each supported data type, create a buffer and confirm its data type...
var ctor;
var buf;
var dt;
var i;
for ( i = 0; i < DTYPES.length; i++ ) {
    ctor = bufferCtors( DTYPES[ i ] );
    if ( DTYPES[ i ] === 'binary' && isFunction( ctor.alloc ) ) {
        buf = ctor.alloc( len );
    } else {
        buf = new ctor( len );
    }
    dt = dtype( buf );
    console.log( '%s == %s => %s', DTYPES[ i ], dt, DTYPES[ i ] === dt );
}

// Try an array-like object...
buf = {
    'length': 10
};
dt = dtype( buf );
console.log( '%s == %s => %s', 'generic', dt, dt === 'generic' );

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.