refactor: use assertion utility

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description: Results of running static analysis checks when committing changes.
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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/empty/lib/main.js

@@ -20,6 +20,7 @@
 
 // MODULES //
 
+var isNumber = require( '@stdlib/assert/is-number' ).isPrimitive;
 var isPlainObject = require( '@stdlib/assert/is-plain-object' );
 var hasOwnProp = require( '@stdlib/assert/has-own-property' );
 var isArrayLike = require( '@stdlib/assert/is-array-like' );
@@ -104,7 +105,7 @@ function empty( shape ) {
 		dtype = DTYPE;
 		order = ORDER;
 	}
-	if ( typeof shape === 'number' ) {
+	if ( isNumber( shape ) ) {
 		sh = [ shape ];
 	} else if ( isArrayLike( shape ) ) {
 		sh = shape;