Return the data type of an ndarray data buffer.
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> Return the data type of an ndarray data buffer.
``bash`
npm install @stdlib/ndarray-base-buffer-dtype
`javascript`
var dtype = require( '@stdlib/ndarray-base-buffer-dtype' );
#### dtype( buffer )
Returns the [data type][@stdlib/ndarray/dtypes] of an ndarray data [buffer][@stdlib/ndarray/base/buffer-ctors].
`javascript
var Float64Array = require( '@stdlib/array-float64' );
var buf = new Float64Array( 10 );
var dt = dtype( buf );
// returns 'float64'
`
If provided an ndarray data [buffer][@stdlib/ndarray/base/buffer-ctors] having an unknown or unsupported [data type][@stdlib/ndarray/dtypes], the function returns null.
`javascript`
var dt = dtype( 'beep' );
// returns null
`javascript
var dtypes = require( '@stdlib/ndarray-dtypes' );
var bufferCtors = require( '@stdlib/ndarray-base-buffer-ctors' );
var dtype = require( '@stdlib/ndarray-base-buffer-dtype' );
// Get a list of supported ndarray buffer data types:
var DTYPES = dtypes( 'integer_and_generic' );
// Buffer length:
var len = 10;
// For each supported data type, create a buffer and confirm its data type...
var ctor;
var dt;
var i;
for ( i = 0; i < DTYPES.length; i++ ) {
ctor = bufferCtors( DTYPES[ i ] );
dt = dtype( new ctor( len ) );
console.log( '%s == %s => %s', DTYPES[ i ], dt, DTYPES[ i ] === dt );
}
// Try an array-like object...
var buf = {
'length': len
};
dt = dtype( buf );
console.log( '%s == %s => %s', 'generic', dt, dt === 'generic' );
`
*
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