feat: add assign and strided methods to math/base/special/cexp

lib/node_modules/@stdlib/math/base/special/cexp/README.md

@@ -65,6 +65,55 @@ v = cexp( new Complex128( 0.0, 1.0 ) );
 // returns <Complex128>[ ~0.540, ~0.841 ]
 ```
 
+#### cexp.assign( re, im, out, strideOut, offsetOut )
+
+Evaluates the [exponential][exponential-function] function for a double-precision complex floating-point number and assigns results to a provided output array.
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+
+var out = new Float64Array( 2 );
+var v = cexp.assign( 0.0, 0.0, out, 1, 0 );
+// returns <Float64Array>[ 1.0, 0.0 ]
+
+var bool = ( out === v );
+// returns true
+```
+
+The function supports the following parameters:
+
+-   **re**: real component.
+-   **im**: imaginary component.
+-   **out**: output array.
+-   **strideOut**: stride length for `out`.
+-   **offsetOut**: starting index for `out`.
+
+#### cexp.strided( z, sz, oz, out, so, oo )
+
+Evaluates the [exponential][exponential-function] function for a double-precision complex floating-point number stored in a real-valued strided array view and assigns results to a provided strided output array.
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+
+var z = new Float64Array( [ 0.0, 0.0 ] );
+var out = new Float64Array( 2 );
+
+var v = cexp.strided( z, 1, 0, out, 1, 0 );
+// returns <Float64Array>[ 1.0, 0.0 ]
+
+var bool = ( out === v );
+// returns true
+```
+
+The function supports the following parameters:
+
+-   **z**: complex number strided array view.
+-   **sz**: stride length for `z`.
+-   **oz**: starting index for `z`.
+-   **out**: output array.
+-   **so**: stride length for `out`.
+-   **oo**: starting index for `out`.
+
 </section>
 
 <!-- /.usage -->
@@ -76,24 +125,16 @@ v = cexp( new Complex128( 0.0, 1.0 ) );
 <!-- eslint no-undef: "error" -->
 
 ```javascript
-var Complex128 = require( '@stdlib/complex/float64/ctor' );
-var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
+var Complex128Array = require( '@stdlib/array/complex128' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
 var cexp = require( '@stdlib/math/base/special/cexp' );
 
-function randomComplex() {
-    var re = discreteUniform( -50, 50 );
-    var im = discreteUniform( -50, 50 );
-    return new Complex128( re, im );
-}
+// Create an array of random numbers:
+var arr = new Complex128Array( uniform( 200, -50.0, 50.0 ) );
 
-var z1;
-var z2;
-var i;
-for ( i = 0; i < 100; i++ ) {
-    z1 = randomComplex();
-    z2 = cexp( z1 );
-    console.log( 'cexp(%s) = %s', z1.toString(), z2.toString() );
-}
+// Compute the exponential function of each number in the array:
+logEachMap( 'cexp(%s) = %s', arr, cexp );
 ```
 
 </section>

lib/node_modules/@stdlib/math/base/special/cexp/benchmark/benchmark.assign.js

@@ -0,0 +1,69 @@
+/**
+* @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 uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var Float64Array = require( '@stdlib/array/float64' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var assign = require( './../lib' ).assign;
+
+
+// VARIABLES //
+
+var options = {
+	'dtype': 'float64'
+};
+
+
+// MAIN //
+
+bench( format( '%s:assign', pkg ), function benchmark( b ) {
+	var out;
+	var re;
+	var im;
+	var N;
+	var i;
+	var j;
+
+	N = 100;
+	re = uniform( N, -50.0, 50.0, options );
+	im = uniform( N, -50.0, 50.0, options );
+
+	out = new Float64Array( 2 );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		j = i % N;
+		out = assign( re[ j ], im[ j ], out, 1, 0 );
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( isnan( out[ 0 ] ) || isnan( out[ 1 ] ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/math/base/special/cexp/benchmark/benchmark.js

@@ -21,36 +21,42 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var uniform = require( '@stdlib/random/base/uniform' );
+var uniform = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
-var Complex128 = require( '@stdlib/complex/float64/ctor' );
+var Complex128Array = require( '@stdlib/array/complex128' );
 var real = require( '@stdlib/complex/float64/real' );
 var imag = require( '@stdlib/complex/float64/imag' );
 var pkg = require( './../package.json' ).name;
 var cexp = require( './../lib' );
 
 
+// VARIABLES //
+
+var options = {
+	'dtype': 'float64'
+};
+
+
 // MAIN //
 
 bench( pkg, function benchmark( b ) {
-	var values;
+	var zbuf;
+	var z;
 	var y;
 	var i;
 
-	values = [
-		new Complex128( uniform( -50.0, 50.0 ), uniform( -50.0, 50.0 ) ),
-		new Complex128( uniform( -50.0, 50.0 ), uniform( -50.0, 50.0 ) )
-	];
+	zbuf = uniform( 200, -50.0, 50.0, options );
+	z = new Complex128Array( zbuf.buffer );
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		y = cexp( values[ i%values.length ] );
-		if ( typeof y !== 'object' ) {
-			b.fail( 'should return a complex number' );
+		y = cexp( z.get( i%100 ) );
+		if ( isnan( real( y ) ) ) {
+			b.fail( 'should not return NaN' );
 		}
 	}
 	b.toc();
-	if ( isnan( real( y ) ) || isnan( imag( y ) ) ) {
+	if ( isnan( imag( y ) ) ) {
 		b.fail( 'should not return NaN' );
 	}
 	b.pass( 'benchmark finished' );

lib/node_modules/@stdlib/math/base/special/cexp/benchmark/benchmark.native.js

@@ -22,9 +22,9 @@
 
 var resolve = require( 'path' ).resolve;
 var bench = require( '@stdlib/bench' );
-var uniform = require( '@stdlib/random/base/uniform' );
+var uniform = require( '@stdlib/random/array/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
-var Complex128 = require( '@stdlib/complex/float64/ctor' );
+var Complex128Array = require( '@stdlib/array/complex128' );
 var real = require( '@stdlib/complex/float64/real' );
 var imag = require( '@stdlib/complex/float64/imag' );
 var tryRequire = require( '@stdlib/utils/try-require' );
@@ -38,29 +38,31 @@ var cexp = tryRequire( resolve( __dirname, './../lib/native.js' ) );
 var opts = {
 	'skip': ( cexp instanceof Error )
 };
+var options = {
+	'dtype': 'float64'
+};
 
 
 // MAIN //
 
 bench( format( '%s::native', pkg ), opts, function benchmark( b ) {
-	var values;
+	var zbuf;
+	var z;
 	var y;
 	var i;
 
-	values = [
-		new Complex128( uniform( -500.0, 500.0 ), uniform( -500.0, 500.0 ) ),
-		new Complex128( uniform( -500.0, 500.0 ), uniform( -500.0, 500.0 ) )
-	];
+	zbuf = uniform( 200, -500.0, 500.0, options );
+	z = new Complex128Array( zbuf.buffer );
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		y = cexp( values[ i%values.length ] );
-		if ( typeof y !== 'object' ) {
-			b.fail( 'should return a complex number' );
+		y = cexp( z.get( i%100 ) );
+		if ( isnan( real( y ) ) ) {
+			b.fail( 'should not return NaN' );
 		}
 	}
 	b.toc();
-	if ( isnan( real( y ) ) || isnan( imag( y ) ) ) {
+	if ( isnan( imag( y ) ) ) {
 		b.fail( 'should not return NaN' );
 	}
 	b.pass( 'benchmark finished' );

lib/node_modules/@stdlib/math/base/special/cexp/benchmark/benchmark.strided.js

@@ -0,0 +1,67 @@
+/**
+* @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 uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var Float64Array = require( '@stdlib/array/float64' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var strided = require( './../lib' ).strided;
+
+
+// VARIABLES //
+
+var options = {
+	'dtype': 'float64'
+};
+
+
+// MAIN //
+
+bench( format( '%s:strided', pkg ), function benchmark( b ) {
+	var out;
+	var z;
+	var N;
+	var i;
+	var j;
+
+	N = 50;
+	z = uniform( N*2, -50.0, 50.0, options );
+
+	out = new Float64Array( 2 );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		j = ( i % N ) * 2;
+		out = strided( z, 1, j, out, 1, 0 );
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( isnan( out[ 0 ] ) || isnan( out[ 1 ] ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});