refactor: improve type specificity and ensure consistency between ndarray types

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---

Author: kgryte

lib/node_modules/@stdlib/types/index.d.ts

@@ -1892,10 +1892,10 @@ declare module '@stdlib/types/ndarray' {
 	}
 
 	/**
-	* Interface describing an ndarray having a generic data type.
+	* Interface describing an ndarray having a homogeneous data type.
 	*
 	* @example
-	* const arr: genericndarray<any> = {
+	* const arr: typedndarray<number> = {
 	*     'byteLength': null,
 	*     'BYTES_PER_ELEMENT': null,
 	*     'data': [ 1, 2, 3 ],
@@ -1919,22 +1919,7 @@ declare module '@stdlib/types/ndarray' {
 	*     }
 	* };
 	*/
-	interface genericndarray<T> extends ndarray {
-		/**
-		* Size (in bytes) of the array.
-		*/
-		byteLength: null;
-
-		/**
-		* Size (in bytes) of each array element.
-		*/
-		BYTES_PER_ELEMENT: null;
-
-		/**
-		* Underlying data type.
-		*/
-		dtype: 'generic';
-
+	interface typedndarray<T> extends ndarray {
 		/**
 		* A reference to the underlying data buffer.
 		*/
@@ -1962,14 +1947,14 @@ declare module '@stdlib/types/ndarray' {
 		* @param args - subscripts and value to set
 		* @returns ndarray instance
 		*/
-		set( ...args: Array<number|T> ): genericndarray<T>;
+		set( ...args: Array<number | T> ): typedndarray<T>;
 	}
 
 	/**
-	* Interface describing an ndarray having a homogeneous data type.
+	* Interface describing an ndarray having a generic data type.
 	*
 	* @example
-	* const arr: typedndarray<number> = {
+	* const arr: genericndarray<any> = {
 	*     'byteLength': null,
 	*     'BYTES_PER_ELEMENT': null,
 	*     'data': [ 1, 2, 3 ],
@@ -1993,7 +1978,22 @@ declare module '@stdlib/types/ndarray' {
 	*     }
 	* };
 	*/
-	interface typedndarray<T> extends ndarray {
+	interface genericndarray<T> extends typedndarray<T> {
+		/**
+		* Size (in bytes) of the array.
+		*/
+		byteLength: null;
+
+		/**
+		* Size (in bytes) of each array element.
+		*/
+		BYTES_PER_ELEMENT: null;
+
+		/**
+		* Underlying data type.
+		*/
+		dtype: 'generic';
+
 		/**
 		* A reference to the underlying data buffer.
 		*/
@@ -2021,7 +2021,7 @@ declare module '@stdlib/types/ndarray' {
 		* @param args - subscripts and value to set
 		* @returns ndarray instance
 		*/
-		set( ...args: Array<number | T> ): typedndarray<T>;
+		set( ...args: Array<number|T> ): genericndarray<T>;
 	}
 
 	/**
@@ -2989,7 +2989,7 @@ declare module '@stdlib/types/ndarray' {
 	*     }
 	* };
 	*/
-	interface realcomplexndarray extends ndarray {
+	interface realcomplexndarray extends typedndarray<number | ComplexLike> {
 		/**
 		* Size (in bytes) of the array.
 		*/
@@ -3010,18 +3010,6 @@ declare module '@stdlib/types/ndarray' {
 		*/
 		dtype: NumericDataType;
 
-		/**
-		* Returns an array element specified according to provided subscripts.
-		*
-		* ## Notes
-		*
-		* -   The number of provided subscripts should equal the number of dimensions.
-		*
-		* @param args - subscripts
-		* @returns array element
-		*/
-		get( ...args: Array<number> ): number | ComplexLike | void;
-
 		/**
 		* Sets an array element specified according to provided subscripts.
 		*
@@ -3063,7 +3051,7 @@ declare module '@stdlib/types/ndarray' {
 	*     }
 	* };
 	*/
-	interface floatcomplexndarray extends ndarray {
+	interface floatcomplexndarray extends typedndarray<number | ComplexLike> {
 		/**
 		* Size (in bytes) of the array.
 		*/
@@ -3084,18 +3072,6 @@ declare module '@stdlib/types/ndarray' {
 		*/
 		dtype: FloatingPointDataType;
 
-		/**
-		* Returns an array element specified according to provided subscripts.
-		*
-		* ## Notes
-		*
-		* -   The number of provided subscripts should equal the number of dimensions.
-		*
-		* @param args - subscripts
-		* @returns array element
-		*/
-		get( ...args: Array<number> ): number | ComplexLike | void;
-
 		/**
 		* Sets an array element specified according to provided subscripts.
 		*
@@ -3137,7 +3113,7 @@ declare module '@stdlib/types/ndarray' {
 	*     }
 	* };
 	*/
-	interface complexndarray extends ndarray {
+	interface complexndarray extends typedndarray<ComplexLike> {
 		/**
 		* Size (in bytes) of the array.
 		*/
@@ -3168,7 +3144,7 @@ declare module '@stdlib/types/ndarray' {
 		* @param args - subscripts
 		* @returns array element
 		*/
-		get( ...args: Array<number> ): ComplexLike | void;
+		get( ...args: Array<number> ): ComplexLike;
 
 		/**
 		* Sets an array element specified according to provided subscripts.
@@ -3237,7 +3213,7 @@ declare module '@stdlib/types/ndarray' {
 		* @param args - subscripts
 		* @returns array element
 		*/
-		get( ...args: Array<number> ): Complex128 | void;
+		get( ...args: Array<number> ): Complex128;
 
 		/**
 		* Sets an array element specified according to provided subscripts.
@@ -3306,7 +3282,7 @@ declare module '@stdlib/types/ndarray' {
 		* @param args - subscripts
 		* @returns array element
 		*/
-		get( ...args: Array<number> ): Complex64 | void;
+		get( ...args: Array<number> ): Complex64;
 
 		/**
 		* Sets an array element specified according to provided subscripts.