isMostlySafeCast

Determine whether an array data type can be safely cast or, for floating-point data types, downcast to another array data type.

Usage

var isMostlySafeCast = require( '@stdlib/array/base/assert/is-mostly-safe-data-type-cast' );

isMostlySafeCast( from, to )

Returns a boolean indicating whether an array data type can be safely cast or, for floating-point data types, downcast to another array data type.

var bool = isMostlySafeCast( 'float32', 'float64' );
// returns true

bool = isMostlySafeCast( 'float64', 'int32' );
// returns false

Examples

var cartesianSquare = require( '@stdlib/array/base/cartesian-square' );
var dtypes = require( '@stdlib/array/dtypes' );
var isMostlySafeCast = require( '@stdlib/array/base/assert/is-mostly-safe-data-type-cast' );

// Generate a list of dtype pairs:
var dt = cartesianSquare( dtypes() );

// For each data type pair, determine whether one can cast to another data type...
var i;
for ( i = 0; i < dt.length; i++ ) {
    console.log( '%s. Can cast? %s.', dt[i].join( ' => ' ), isMostlySafeCast.apply( null, dt[i] ) );
}