broadcastScalar

Broadcast a scalar value to an ndarray having a specified shape.

Usage

var broadcastScalar = require( '@stdlib/ndarray/base/broadcast-scalar' );

broadcastScalar( value, dtype, shape, order )

Broadcasts a scalar value to an ndarray having a specified shape and data type.

var x = broadcastScalar( 1.0, 'float64', [ 2, 2 ], 'row-major' );
// returns <ndarray>

var sh = x.shape;
// returns [ 2, 2 ]

var dt = x.dtype;
// returns 'float64'

var v = x.get( 0, 0 );
// returns 1.0

Notes

If value is a number and dtype is a complex data type, the function returns an ndarray containing a complex number whose real component equals the provided scalar value and whose imaginary component is zero.
The returned ndarray is a view on an ndarray data buffer containing a single element. The view is not contiguous. As more than one element of a returned view may refer to the same memory location, writing to the view may affect multiple elements. If you need to write to the returned ndarray, copy the ndarray before performing operations which may mutate elements.
The returned ndarray is a "base" ndarray, and, thus, the returned ndarray does not perform bounds checking or afford any of the guarantees of the non-base ndarray constructor. The primary intent of this function is to broadcast a scalar value as an ndarray within internal implementations and to do so with minimal overhead.

Examples

var dtypes = require( '@stdlib/ndarray/dtypes' );
var broadcastScalar = require( '@stdlib/ndarray/base/broadcast-scalar' );

// Get a list of data types:
var dt = dtypes();

// Generate two-dimensional arrays...
var x;
var i;
for ( i = 0; i < dt.length; i++ ) {
    x = broadcastScalar( i, dt[ i ], [ 2, 2 ], 'row-major' );
    console.log( x.get( 0, 1 ) );
}