Determine if an ndarray data type can be safely cast or, for floating-point data types, downcast to another ndarray data type.
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> Determine whether an ndarray [data type][@stdlib/ndarray/dtypes] can be safely cast or, for floating-point data types, downcast to another ndarray [data type][@stdlib/ndarray/dtypes].
``bash`
npm install @stdlib/ndarray-base-assert-is-mostly-safe-data-type-cast
`javascript`
var isMostlySafeCast = require( '@stdlib/ndarray-base-assert-is-mostly-safe-data-type-cast' );
#### isMostlySafeCast( from, to )
Returns a boolean indicating whether an ndarray [data type][@stdlib/ndarray/dtypes] can be safely cast or, for floating-point data types, downcast to another ndarray [data type][@stdlib/ndarray/dtypes].
`javascript
var bool = isMostlySafeCast( 'float32', 'float64' );
// returns true
bool = isMostlySafeCast( 'float64', 'int32' );
// returns false
`
`javascript
var cartesianSquare = require( '@stdlib/array-cartesian-square' );
var dtypes = require( '@stdlib/ndarray-base-dtype-strings' );
var isMostlySafeCast = require( '@stdlib/ndarray-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] ) );
}
`
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---
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