feat: add number/float16/base/assert/is-nan

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/README.md

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+<!--
+
+@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.
+
+-->
+
+# isnan
+
+> Test if a half-precision floating-point numeric value is NaN.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var isnan = require( '@stdlib/number/float16/base/assert/is-nan' );
+```
+
+#### isnan( x )
+
+Tests if a half-precision floating-point `numeric` value is `NaN`.
+
+```javascript
+var bool = isnan( NaN );
+// returns true
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var isnan = require( '@stdlib/number/float16/base/assert/is-nan' );
+
+var bool = isnan( NaN );
+// returns true
+
+bool = isnan( 5.0 );
+// returns false
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/benchmark/benchmark.js

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+/**
+* @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 toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+var map = require( '@stdlib/array/base/map' );
+var naryFunction = require( '@stdlib/utils/nary-function' );
+var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var pkg = require( './../package.json' ).name;
+var isnan = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var x;
+	var y;
+	var i;
+
+	x = map( uniform( 100, -5.0e6, 5.0e6 ), naryFunction( toFloat16, 1 ) );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y = isnan( x[ i%x.length ] );
+		if ( typeof y !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( y ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/docs/repl.txt

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+
+{{alias}}( x )
+    Tests if a half-precision floating-point numeric value is `NaN`.
+
+    Parameters
+    ----------
+    x: number
+        Value to test.
+
+    Returns
+    -------
+    bool: boolean
+        Boolean indicating whether the value is `NaN`.
+
+    Examples
+    --------
+    > var bool = {{alias}}( NaN )
+    true
+    > bool = {{alias}}( 7.0 )
+    false
+
+    See Also
+    --------
+

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/docs/types/index.d.ts

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+/*
+* @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.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Tests if a half-precision floating-point numeric value is `NaN`.
+*
+* @param x - value to test
+* @returns boolean indicating whether the value is `NaN`
+*
+* @example
+* var bool = isnan( NaN );
+* // returns true
+*
+* @example
+* var bool = isnan( 7.0 );
+* // returns false
+*/
+declare function isnan( x: number ): boolean;
+
+
+// EXPORTS //
+
+export = isnan;

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/docs/types/test.ts

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+/*
+* @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.
+*/
+
+import isnan = require( './index' );
+
+
+// TESTS //
+
+// The function returns a boolean...
+{
+	isnan( NaN ); // $ExpectType boolean
+	isnan( 2 ); // $ExpectType boolean
+	isnan( 3 ); // $ExpectType boolean
+}
+
+// The compiler throws an error if the function is provided a value other than a number...
+{
+	isnan( true ); // $ExpectError
+	isnan( false ); // $ExpectError
+	isnan( null ); // $ExpectError
+	isnan( undefined ); // $ExpectError
+	isnan( [] ); // $ExpectError
+	isnan( {} ); // $ExpectError
+	isnan( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+	isnan(); // $ExpectError
+	isnan( undefined, 123 ); // $ExpectError
+}

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/examples/index.js

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+/**
+* @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';
+
+var isnan = require( './../lib' );
+
+console.log( isnan( NaN ) );
+// => true
+
+console.log( isnan( 5 ) );
+// => false

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/lib/index.js

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+/**
+* @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';
+
+/**
+* Test if a half-precision floating-point numeric value is `NaN`.
+*
+* @module @stdlib/number/float16/base/assert/is-nan
+*
+* @example
+* var isnan = require( '@stdlib/number/float16/base/assert/is-nan' );
+*
+* var bool = isnan( NaN );
+* // returns true
+*
+* bool = isnan( 7.0 );
+* // returns false
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;

lib/node_modules/@stdlib/number/float16/base/assert/is-nan/lib/main.js

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+/**
+* @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';
+
+// MAIN //
+
+/**
+* Tests if a half-precision floating-point numeric value is `NaN`.
+*
+* @param {number} x - value to test
+* @returns {boolean} boolean indicating whether the value is `NaN`
+*
+* @example
+* var bool = isnan( NaN );
+* // returns true
+*
+* @example
+* var bool = isnan( 7.0 );
+* // returns false
+*/
+function isnan( x ) {
+	return ( x !== x );
+}
+
+
+// EXPORTS //
+
+module.exports = isnan;