refactor: improve type specificity

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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/prepend-singleton-dimensions/docs/types/index.d.ts

@@ -39,7 +39,7 @@ import { ndarray } from '@stdlib/types/ndarray';
 * var y = prependSingletonDimensions( x, 3, false );
 * // returns <ndarray>[ [ [ [ [ 1, 2 ], [ 3, 4 ] ] ] ] ]
 */
-declare function prependSingletonDimensions( x: ndarray, n: number, writable: boolean ): ndarray;
+declare function prependSingletonDimensions<T extends ndarray>( x: T, n: number, writable: boolean ): T;
 
 
 // EXPORTS //

lib/node_modules/@stdlib/ndarray/base/prepend-singleton-dimensions/docs/types/test.ts

@@ -16,17 +16,21 @@
 * limitations under the License.
 */
 
-import array = require( '@stdlib/ndarray/array' );
+/* eslint-disable space-in-parens */
+
+import zeros = require( '@stdlib/ndarray/zeros' );
 import prependSingletonDimensions = require( './index' );
 
 
 // TESTS //
 
 // The function returns an ndarray...
 {
-	const x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
 
-	prependSingletonDimensions( x, 3, false ); // $ExpectType ndarray
+	prependSingletonDimensions( x, 3, false ); // $ExpectType float64ndarray
 }
 
 // The compiler throws an error if the function is not provided a first argument which is an ndarray...
@@ -43,7 +47,9 @@ import prependSingletonDimensions = require( './index' );
 
 // The compiler throws an error if the function is not provided a second argument which is a number...
 {
-	const x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
 
 	prependSingletonDimensions( x, '5', false ); // $ExpectError
 	prependSingletonDimensions( x, true, false ); // $ExpectError
@@ -56,7 +62,9 @@ import prependSingletonDimensions = require( './index' );
 
 // The compiler throws an error if the function is not provided a third argument which is a boolean...
 {
-	const x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
 
 	prependSingletonDimensions( x, 3, '5' ); // $ExpectError
 	prependSingletonDimensions( x, 3, 5 ); // $ExpectError
@@ -68,7 +76,9 @@ import prependSingletonDimensions = require( './index' );
 
 // The compiler throws an error if the function is provided an unsupported number of arguments...
 {
-	const x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
 
 	prependSingletonDimensions(); // $ExpectError
 	prependSingletonDimensions( x ); // $ExpectError

lib/node_modules/@stdlib/ndarray/base/prepend-singleton-dimensions/test/test.js

@@ -23,6 +23,9 @@
 var tape = require( 'tape' );
 var array = require( '@stdlib/ndarray/array' );
 var ndarray = require( '@stdlib/ndarray/base/ctor' );
+var getShape = require( '@stdlib/ndarray/shape' );
+var getData = require( '@stdlib/ndarray/data-buffer' );
+var getStrides = require( '@stdlib/ndarray/strides' );
 var isReadOnly = require( '@stdlib/ndarray/base/assert/is-read-only' );
 var prependSingletonDimensions = require( './../lib' ); // eslint-disable-line id-length
 
@@ -44,15 +47,15 @@ tape( 'the function prepends singleton dimensions', function test( t ) {
 	y = prependSingletonDimensions( x, 3, false );
 
 	t.notEqual( y, x, 'returns expected value' );
-	t.deepEqual( y.shape, [ 1, 1, 1, 2, 2 ], 'returns expected value' );
-	t.strictEqual( y.data, x.data, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 1, 1, 1, 2, 2 ], 'returns expected value' );
+	t.strictEqual( getData( y ), getData( x ), 'returns expected value' );
 	t.strictEqual( isReadOnly( y ), true, 'returns expected value' );
 
 	y = prependSingletonDimensions( x, 3, true );
 
 	t.notEqual( y, x, 'returns expected value' );
-	t.deepEqual( y.shape, [ 1, 1, 1, 2, 2 ], 'returns expected value' );
-	t.strictEqual( y.data, x.data, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 1, 1, 1, 2, 2 ], 'returns expected value' );
+	t.strictEqual( getData( y ), x.data, 'returns expected value' );
 	t.strictEqual( isReadOnly( y ), false, 'returns expected value' );
 
 	t.end();
@@ -66,9 +69,9 @@ tape( 'the function prepends singleton dimensions (base; row-major)', function t
 	y = prependSingletonDimensions( x, 3, false );
 
 	t.notEqual( y, x, 'returns expected value' );
-	t.deepEqual( y.shape, [ 1, 1, 1, 2, 1, 2 ], 'returns expected value' );
-	t.deepEqual( y.strides, [ 2, 2, 2, 2, 2, 1 ], 'returns expected value' );
-	t.strictEqual( y.data, x.data, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 1, 1, 1, 2, 1, 2 ], 'returns expected value' );
+	t.deepEqual( getStrides( y ), [ 2, 2, 2, 2, 2, 1 ], 'returns expected value' );
+	t.strictEqual( getData( y ), getData( x ), 'returns expected value' );
 
 	t.end();
 });
@@ -81,9 +84,9 @@ tape( 'the function prepends singleton dimensions (base; column-major)', functio
 	y = prependSingletonDimensions( x, 3, false );
 
 	t.notEqual( y, x, 'returns expected value' );
-	t.deepEqual( y.shape, [ 1, 1, 1, 2, 1, 2 ], 'returns expected value' );
-	t.deepEqual( y.strides, [ 1, 1, 1, 1, 2, 2 ], 'returns expected value' );
-	t.strictEqual( y.data, x.data, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 1, 1, 1, 2, 1, 2 ], 'returns expected value' );
+	t.deepEqual( getStrides( y ), [ 1, 1, 1, 1, 2, 2 ], 'returns expected value' );
+	t.strictEqual( getData( y ), getData( x ), 'returns expected value' );
 
 	t.end();
 });