diff --git a/lib/node_modules/@stdlib/array/uint64/README.md b/lib/node_modules/@stdlib/array/uint64/README.md
index 02da19409141..b4a92a6c8d2b 100644
--- a/lib/node_modules/@stdlib/array/uint64/README.md
+++ b/lib/node_modules/@stdlib/array/uint64/README.md
@@ -335,6 +335,28 @@ var u = arr.get( 100 );
// returns undefined
```
+
+
+#### Uint64Array.prototype.join( \[separator] )
+
+Returns a new string by concatenating all array elements.
+
+```javascript
+var arr = new Uint64Array( [ 1, 2, 3 ] );
+
+var str = arr.join();
+// returns '1,2,3'
+```
+
+By default, the method separates serialized array elements with a comma. To use an alternative separator, provide a `separator` string.
+
+```javascript
+var arr = new Uint64Array( [ 1, 2, 3 ] );
+
+var str = arr.join( '/' );
+// returns '1/2/3'
+```
+
#### Uint64Array.prototype.set( value\[, i] )
diff --git a/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.join.js b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.join.js
new file mode 100644
index 000000000000..7901e28c7f79
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.join.js
@@ -0,0 +1,76 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 bench = require( '@stdlib/bench' );
+var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var Uint64Array = require( './../lib' );
+
+
+// MAIN //
+
+bench( format( '%s:join', pkg ), function benchmark( b ) {
+ var out;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 10 );
+
+ // Benchmark worst case scenario (i.e., every element must be serialized and concatenated)...
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = arr.join();
+ if ( typeof out !== 'string' ) {
+ b.fail( 'should return a string' );
+ }
+ }
+ b.toc();
+ if ( !isString( out ) ) {
+ b.fail( 'should return a string' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
+
+bench( format( '%s::separator:join', pkg ), function benchmark( b ) {
+ var out;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 10 );
+
+ // Benchmark worst case scenario (i.e., every element must be serialized and concatenated)...
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = arr.join( '/' );
+ if ( typeof out !== 'string' ) {
+ b.fail( 'should return a string' );
+ }
+ }
+ b.toc();
+ if ( !isString( out ) ) {
+ b.fail( 'should return a string' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.join.length.js b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.join.length.js
new file mode 100644
index 000000000000..7376135ed7a6
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.join.length.js
@@ -0,0 +1,96 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 bench = require( '@stdlib/bench' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var Uint64Array = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var arr = new Uint64Array( len );
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var out;
+ var i;
+
+ // Benchmark worst case scenario (i.e., every element must be serialized and concatenated)...
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = arr.join();
+ if ( typeof out !== 'string' ) {
+ b.fail( 'should return a string' );
+ }
+ }
+ b.toc();
+ if ( !isString( out ) ) {
+ b.fail( 'should return a string' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+ }
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+ var len;
+ var min;
+ var max;
+ var f;
+ var i;
+
+ min = 1; // 10^min
+ max = 6; // 10^max
+
+ for ( i = min; i <= max; i++ ) {
+ len = pow( 10, i );
+ f = createBenchmark( len );
+ bench( format( '%s:join:len=%d', pkg, len ), f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/array/uint64/docs/repl.txt b/lib/node_modules/@stdlib/array/uint64/docs/repl.txt
index c737fc5bf588..47c25be7e6b9 100644
--- a/lib/node_modules/@stdlib/array/uint64/docs/repl.txt
+++ b/lib/node_modules/@stdlib/array/uint64/docs/repl.txt
@@ -299,6 +299,30 @@
[ 2n ]
+{{alias}}.prototype.join( [separator] )
+ Returns a new string by concatenating all array elements separated by a
+ separator string.
+
+ Parameters
+ ----------
+ separator: string (optional)
+ Separator string. Default: ','.
+
+ Returns
+ -------
+ out: string
+ Array serialized as a string.
+
+ Examples
+ --------
+ > var arr = new {{alias}}( [ 1, 2, 3 ] )
+ [ 1n, 2n, 3n ]
+ > var str = arr.join()
+ '1,2,3'
+ > str = arr.join( '/' )
+ '1/2/3'
+
+
{{alias}}.prototype.set( v[, i] )
Sets one or more array elements.
diff --git a/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts b/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts
index 78b11c503625..4ece75a89695 100644
--- a/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts
@@ -477,6 +477,23 @@ declare class Uint64Array implements Uint64ArrayInterface {
*/
get( i: number ): Uint64 | void;
+ /**
+ * Returns a new string by concatenating all array elements.
+ *
+ * @param separator - value separator (default: ',')
+ * @returns string
+ *
+ * @example
+ * var arr = new Uint64Array( [ 1, 2, 3 ] );
+ *
+ * var str = arr.join();
+ * // returns '1,2,3'
+ *
+ * str = arr.join( '/' );
+ * // returns '1/2/3'
+ */
+ join( separator?: string ): string;
+
/**
* Sets an array element.
*
diff --git a/lib/node_modules/@stdlib/array/uint64/lib/main.js b/lib/node_modules/@stdlib/array/uint64/lib/main.js
index 684cb8e4b9bd..5cec3ab2d928 100644
--- a/lib/node_modules/@stdlib/array/uint64/lib/main.js
+++ b/lib/node_modules/@stdlib/array/uint64/lib/main.js
@@ -30,6 +30,7 @@ var isCollection = require( '@stdlib/assert/is-collection' );
var isArrayBuffer = require( '@stdlib/assert/is-arraybuffer' );
var isObject = require( '@stdlib/assert/is-object' );
var isFunction = require( '@stdlib/assert/is-function' );
+var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var isUint64 = require( '@stdlib/assert/is-uint64' );
var isInteger = require( '@stdlib/math/base/assert/is-integer' );
var ITERATOR_SYMBOL = require( '@stdlib/symbol/iterator' );
@@ -740,6 +741,48 @@ setReadOnly( Uint64Array.prototype, 'get', function get( idx ) {
return getUint64( this._buffer, idx );
});
+/**
+* Returns a new string by concatenating all array elements.
+*
+* @name join
+* @memberof Uint64Array.prototype
+* @type {Function}
+* @param {string} [separator=','] - element separator
+* @throws {TypeError} `this` must be a 64-bit unsigned integer array
+* @throws {TypeError} first argument must be a string
+* @returns {string} string representation
+*
+* @example
+* var arr = new Uint64Array( [ 1, 2, 3 ] );
+*
+* var str = arr.join();
+* // returns '1,2,3'
+*
+* str = arr.join( '/' );
+* // returns '1/2/3'
+*/
+setReadOnly( Uint64Array.prototype, 'join', function join( separator ) {
+ var out;
+ var buf;
+ var i;
+ if ( !isUint64Array( this ) ) {
+ throw new TypeError( 'invalid invocation. `this` is not a 64-bit unsigned integer array.' );
+ }
+ if ( arguments.length > 0 ) {
+ if ( !isString( separator ) ) {
+ throw new TypeError( format( 'invalid argument. First argument must be a string. Value: `%s`.', separator ) );
+ }
+ } else {
+ separator = ',';
+ }
+ buf = this._buffer;
+ out = [];
+ for ( i = 0; i < this._length; i++ ) {
+ out.push( getUint64( buf, i ).toString() );
+ }
+ return out.join( separator );
+});
+
/**
* Number of array elements.
*
diff --git a/lib/node_modules/@stdlib/array/uint64/test/test.join.js b/lib/node_modules/@stdlib/array/uint64/test/test.join.js
new file mode 100644
index 000000000000..9dbd1185bc04
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/uint64/test/test.join.js
@@ -0,0 +1,161 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 tape = require( 'tape' );
+var hasOwnProp = require( '@stdlib/assert/has-own-property' );
+var isFunction = require( '@stdlib/assert/is-function' );
+var Uint64Array = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof Uint64Array, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'attached to the prototype of the main export is a `join` method', function test( t ) {
+ t.strictEqual( hasOwnProp( Uint64Array.prototype, 'join' ), true, 'has property' );
+ t.strictEqual( isFunction( Uint64Array.prototype.join ), true, 'has method' );
+ t.end();
+});
+
+tape( 'the method throws an error if invoked with a `this` context which is not a 64-bit unsigned integer array instance', function test( t ) {
+ var values;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 5 );
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ {},
+ []
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ return arr.join.call( value );
+ };
+ }
+});
+
+tape( 'the method throws an error if invoked with a `separator` argument which is not a string', function test( t ) {
+ var values;
+ var arr;
+ var i;
+
+ arr = new Uint64Array( 5 );
+
+ values = [
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ {},
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ return arr.join( value );
+ };
+ }
+});
+
+tape( 'the method returns an empty string if invoked on an empty array', function test( t ) {
+ var str;
+ var arr;
+
+ arr = new Uint64Array();
+ str = arr.join();
+
+ t.strictEqual( str, '', 'returns expected value' );
+ t.end();
+});
+
+tape( 'the method returns a string representation of a 64-bit unsigned integer array with elements separated by a separator', function test( t ) {
+ var expected;
+ var str;
+ var arr;
+
+ arr = new Uint64Array( [ 1, 2, 3, 4 ] );
+ expected = '1@2@3@4';
+
+ str = arr.join( '@' );
+
+ t.strictEqual( str, expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the method returns a string representation of a 64-bit unsigned integer array with elements separated by a separator (single element)', function test( t ) {
+ var expected;
+ var str;
+ var arr;
+
+ arr = new Uint64Array( [ 1 ] );
+ expected = '1';
+
+ str = arr.join();
+
+ t.strictEqual( str, expected, 'returns expected value' );
+
+ arr = new Uint64Array( [ 1 ] );
+ expected = '1';
+
+ str = arr.join( '@' );
+
+ t.strictEqual( str, expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'if method invoked without a separator argument, the method returns a string representation of a 64-bit unsigned integer array with elements separated by a comma', function test( t ) {
+ var expected;
+ var str;
+ var arr;
+
+ arr = new Uint64Array( [ 1, 2, 3, 4 ] );
+ expected = '1,2,3,4';
+
+ str = arr.join();
+
+ t.strictEqual( str, expected, 'returns expected value' );
+ t.end();
+});