From 1db0041344f4c55f47296a03cc4bc5b2451c9316 Mon Sep 17 00:00:00 2001
From: AtharvaPatange <164712914+AtharvaPatange@users.noreply.github.com>
Date: Thu, 5 Nov 2026 07:03:42 +0530
Subject: [PATCH] feat: add `blas/ext/base/ndarray/dnancount`
Ref: https://github.com/stdlib-js/stdlib/issues/14404
---
.../blas/ext/base/ndarray/dnancount/README.md | 119 ++++++++++++
.../ndarray/dnancount/benchmark/benchmark.js | 119 ++++++++++++
.../ext/base/ndarray/dnancount/docs/repl.txt | 26 +++
.../ndarray/dnancount/docs/types/index.d.ts | 50 +++++
.../base/ndarray/dnancount/docs/types/test.ts | 57 ++++++
.../base/ndarray/dnancount/examples/index.js | 42 +++++
.../ext/base/ndarray/dnancount/lib/index.js | 43 +++++
.../ext/base/ndarray/dnancount/lib/main.js | 60 ++++++
.../ext/base/ndarray/dnancount/package.json | 71 ++++++++
.../ext/base/ndarray/dnancount/test/test.js | 171 ++++++++++++++++++
10 files changed, 758 insertions(+)
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/README.md
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/benchmark/benchmark.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/repl.txt
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/index.d.ts
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/test.ts
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/examples/index.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/index.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/main.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/package.json
create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/test/test.js
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/README.md
new file mode 100644
index 000000000000..d9dabd6c099c
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/README.md
@@ -0,0 +1,119 @@
+
+
+# dnancount
+
+> Compute the number of non-`NaN` elements in a one-dimensional double-precision floating-point ndarray.
+
+
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var dnancount = require( '@stdlib/blas/ext/base/ndarray/dnancount' );
+```
+
+#### dnancount( arrays )
+
+Computes the number of non-`NaN` elements in a one-dimensional double-precision floating-point ndarray.
+
+```javascript
+var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+
+var x = new Float64Vector( [ 1.0, -2.0, NaN, 2.0 ] );
+
+var v = dnancount( [ x ] );
+// returns 3
+```
+
+The function has the following parameters:
+
+- **arrays**: array-like object containing a one-dimensional input ndarray.
+
+
+
+
+
+
+
+## Notes
+
+- If provided an empty one-dimensional ndarray, the function returns `0`.
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var bernoulli = require( '@stdlib/random/base/bernoulli' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
+var fillBy = require( '@stdlib/ndarray/fill-by' );
+var zeros = require( '@stdlib/ndarray/zeros' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var dnancount = require( '@stdlib/blas/ext/base/ndarray/dnancount' );
+
+function clbk() {
+ if ( bernoulli( 0.7 ) > 0 ) {
+ return discreteUniform( 0, 100 );
+ }
+ return NaN;
+}
+
+var opts = {
+ 'dtype': 'float64'
+};
+var x = fillBy( zeros( [ 10 ], opts ), clbk );
+console.log( ndarray2array( x ) );
+
+var v = dnancount( [ x ] );
+console.log( v );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/benchmark/benchmark.js
new file mode 100644
index 000000000000..1d22053901ae
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/benchmark/benchmark.js
@@ -0,0 +1,119 @@
+/**
+* @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 bernoulli = require( '@stdlib/random/base/bernoulli' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
+var fillBy = require( '@stdlib/ndarray/fill-by' );
+var zeros = require( '@stdlib/ndarray/zeros' );
+var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
+var pow = require( '@stdlib/math/base/special/pow' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var dnancount = require( './../lib' );
+
+
+// VARIABLES //
+
+var options = {
+ 'dtype': 'float64'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Returns a random number.
+*
+* @private
+* @returns {number} random number or `NaN`
+*/
+function rand() {
+ if ( bernoulli( 0.7 ) > 0 ) {
+ return discreteUniform( -10.0, 10.0 );
+ }
+ return NaN;
+}
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var x = fillBy( zeros( [ len ], options ), rand );
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var v;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ v = dnancount( [ x ] );
+ if ( !isNonNegativeInteger( v ) ) {
+ b.fail( 'should return a nonnegative integer' );
+ }
+ }
+ b.toc();
+ if ( !isNonNegativeInteger( v ) ) {
+ b.fail( 'should return a nonnegative integer' );
+ }
+ 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:len=%d', pkg, len ), f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/repl.txt
new file mode 100644
index 000000000000..581c14ec07c7
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/repl.txt
@@ -0,0 +1,26 @@
+
+{{alias}}( arrays )
+ Computes the number of non-`NaN` elements in a one-dimensional double-
+ precision floating-point ndarray.
+
+ If provided an empty ndarray, the function returns `0`.
+
+ Parameters
+ ----------
+ arrays: ArrayLikeObject
+ Array-like object containing a one-dimensional input ndarray.
+
+ Returns
+ -------
+ out: integer
+ Number of non-`NaN` elements.
+
+ Examples
+ --------
+ > var x = new {{alias:@stdlib/ndarray/vector/float64}}( [ 1.0, -2.0, NaN, 2.0 ] );
+ > {{alias}}( [ x ] )
+ 3
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/index.d.ts
new file mode 100644
index 000000000000..21a63aa4668c
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/index.d.ts
@@ -0,0 +1,50 @@
+/*
+* @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
+
+///
+
+import { float64ndarray } from '@stdlib/types/ndarray';
+
+/**
+* Computes the number of non-`NaN` elements in a one-dimensional double-precision floating-point ndarray.
+*
+* ## Notes
+*
+* - The function expects the following ndarrays:
+*
+* - a one-dimensional input ndarray.
+*
+* @param arrays - array-like object containing ndarrays
+* @returns number of non-`NaN` elements
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+*
+* var x = new Float64Vector( [ 1.0, -2.0, NaN, 2.0 ] );
+*
+* var v = dnancount( [ x ] );
+* // returns 3
+*/
+declare function dnancount( arrays: [ float64ndarray ] ): number;
+
+
+// EXPORTS //
+
+export = dnancount;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/test.ts
new file mode 100644
index 000000000000..7108e6de3c28
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/docs/types/test.ts
@@ -0,0 +1,57 @@
+/*
+* @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.
+*/
+
+/* eslint-disable space-in-parens */
+
+import zeros = require( '@stdlib/ndarray/zeros' );
+import dnancount = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ const x = zeros( [ 10 ], {
+ 'dtype': 'float64'
+ });
+
+ dnancount( [ x ] ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a first argument which is not an array of ndarrays...
+{
+ dnancount( '10' ); // $ExpectError
+ dnancount( 10 ); // $ExpectError
+ dnancount( true ); // $ExpectError
+ dnancount( false ); // $ExpectError
+ dnancount( null ); // $ExpectError
+ dnancount( undefined ); // $ExpectError
+ dnancount( [] ); // $ExpectError
+ dnancount( {} ); // $ExpectError
+ dnancount( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+ const x = zeros( [ 10 ], {
+ 'dtype': 'float64'
+ });
+
+ dnancount(); // $ExpectError
+ dnancount( [ x ], {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/examples/index.js
new file mode 100644
index 000000000000..9e2f6597e009
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/examples/index.js
@@ -0,0 +1,42 @@
+/**
+* @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 bernoulli = require( '@stdlib/random/base/bernoulli' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
+var fillBy = require( '@stdlib/ndarray/fill-by' );
+var zeros = require( '@stdlib/ndarray/zeros' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var dnancount = require( './../lib' );
+
+function clbk() {
+ if ( bernoulli( 0.7 ) > 0 ) {
+ return discreteUniform( 0, 100 );
+ }
+ return NaN;
+}
+
+var opts = {
+ 'dtype': 'float64'
+};
+var x = fillBy( zeros( [ 10 ], opts ), clbk );
+console.log( ndarray2array( x ) );
+
+var v = dnancount( [ x ] );
+console.log( v );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/index.js
new file mode 100644
index 000000000000..9fdd1c852a2e
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/index.js
@@ -0,0 +1,43 @@
+/**
+* @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';
+
+/**
+* Compute the number of non-`NaN` elements in a one-dimensional double-precision floating-point ndarray.
+*
+* @module @stdlib/blas/ext/base/ndarray/dnancount
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+* var dnancount = require( '@stdlib/blas/ext/base/ndarray/dnancount' );
+*
+* var x = new Float64Vector( [ 1.0, -2.0, NaN, 2.0 ] );
+*
+* var v = dnancount( [ x ] );
+* // returns 3
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/main.js
new file mode 100644
index 000000000000..5e6be8071400
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dnancount/lib/main.js
@@ -0,0 +1,60 @@
+/**
+* @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 numelDimension = require( '@stdlib/ndarray/base/numel-dimension' );
+var getStride = require( '@stdlib/ndarray/base/stride' );
+var getOffset = require( '@stdlib/ndarray/base/offset' );
+var getData = require( '@stdlib/ndarray/base/data-buffer' );
+var strided = require( '@stdlib/blas/ext/base/dnancount' ).ndarray;
+
+
+// MAIN //
+
+/**
+* Computes the number of non-`NaN` elements in a one-dimensional double-precision floating-point ndarray.
+*
+* ## Notes
+*
+* - The function expects the following ndarrays:
+*
+* - a one-dimensional input ndarray.
+*
+* @param {ArrayLikeObject