refactor: move function to file

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---

Author: kgryte

lib/node_modules/@stdlib/array/struct-factory/lib/is_struct_constructor.js

@@ -0,0 +1,51 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
+var isFunction = require( '@stdlib/assert/is-function' );
+
+
+// MAIN //
+
+/**
+* Returns a boolean indicating if a value is a `struct` constructor.
+*
+* @private
+* @param {*} value - value to test
+* @returns {boolean} boolean indicating if a value is a `struct` constructor
+*/
+function isStructConstructor( value ) {
+	return (
+		isFunction( value ) &&
+		isPositiveInteger( value.alignment ) &&
+		isPositiveInteger( value.byteLength ) &&
+		isFunction( value.byteLengthOf ) &&
+		isFunction( value.byteOffsetOf ) &&
+		isFunction( value.bufferOf ) &&
+		isFunction( value.viewOf )
+	);
+}
+
+
+// EXPORTS //
+
+module.exports = isStructConstructor;

lib/node_modules/@stdlib/array/struct-factory/lib/main.js

@@ -23,7 +23,6 @@
 // MODULES //
 
 var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
-var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
 var isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive;
 var isArrayBuffer = require( '@stdlib/assert/is-arraybuffer' );
 var isCollection = require( '@stdlib/assert/is-collection' );
@@ -43,6 +42,7 @@ var accessorGetter = require( '@stdlib/array/base/accessor-getter' );
 var gcopy = require( '@stdlib/blas/base/gcopy' ).ndarray;
 var structFactory = require( '@stdlib/dstructs/struct' );
 var format = require( '@stdlib/string/format' );
+var isStructConstructor = require( './is_struct_constructor.js' );
 var fromArray = require( './from_array.js' );
 var fromIterator = require( './from_iterator.js' );
 
@@ -53,28 +53,6 @@ var HAS_ITERATOR_SYMBOL = hasIteratorSymbolSupport();
 var CTOR_NAME = 'StructArray';
 
 
-// FUNCTIONS //
-
-/**
-* Returns a boolean indicating if a value is a `struct` constructor.
-*
-* @private
-* @param {*} value - value to test
-* @returns {boolean} boolean indicating if a value is a `struct` constructor
-*/
-function isStructConstructor( value ) {
-	return (
-		isFunction( value ) &&
-		isPositiveInteger( value.alignment ) &&
-		isPositiveInteger( value.byteLength ) &&
-		isFunction( value.byteLengthOf ) &&
-		isFunction( value.byteOffsetOf ) &&
-		isFunction( value.bufferOf ) &&
-		isFunction( value.viewOf )
-	);
-}
-
-
 // MAIN //
 
 /**