fix: update argument juggling

---
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---

Author: kgryte

lib/node_modules/@stdlib/blas/ext/last-index-of/lib/assign.js

@@ -114,12 +114,6 @@ function assign( x, searchElement, fromIndex, out ) {
 	if ( !isndarrayLike( x ) ) {
 		throw new TypeError( format( 'invalid argument. First argument must be an ndarray. Value: `%s`.', x ) );
 	}
-	if ( nargs < 2 ) {
-		throw new TypeError( format( 'invalid argument. Second argument must be either an ndarray or a scalar value. Value: `%s`.', searchElement ) );
-	}
-	if ( nargs < 3 ) {
-		throw new TypeError( format( 'invalid argument. Third argument must be an ndarray. Value: `%s`.', fromIndex ) );
-	}
 	// Resolve input ndarray meta data:
 	dt = getDType( x );
 	ord = getOrder( x );
@@ -139,8 +133,11 @@ function assign( x, searchElement, fromIndex, out ) {
 	hasOptions = false;
 
 	// Case: assign( x, search_element, out )
-	if ( nargs === 3 ) {
+	if ( nargs <= 3 ) {
 		o = fromIndex;
+		if ( !isndarrayLike( o ) ) {
+			throw new TypeError( format( 'invalid argument. Third argument must be an ndarray. Value: `%s`.', o ) );
+		}
 	}
 	// Case: assign( x, search_element, ???, ??? )
 	else if ( nargs === 4 ) {
@@ -165,6 +162,9 @@ function assign( x, searchElement, fromIndex, out ) {
 		// Case: assign( x, search_element, out, options )
 		else {
 			o = fromIndex;
+			if ( !isndarrayLike( o ) ) {
+				throw new TypeError( format( 'invalid argument. Third argument must be an ndarray. Value: `%s`.', o ) );
+			}
 			options = out;
 			hasOptions = true;
 		}
@@ -185,6 +185,9 @@ function assign( x, searchElement, fromIndex, out ) {
 			throw new TypeError( format( 'invalid argument. Third argument must be either an ndarray or an integer. Value: `%s`.', fromIndex ) );
 		}
 		o = out;
+		if ( !isndarrayLike( o ) ) {
+			throw new TypeError( format( 'invalid argument. Fourth argument must be an ndarray. Value: `%s`.', o ) );
+		}
 		options = arguments[ 4 ];
 		hasOptions = true;
 	}