feat: add iter/cunone

lib/node_modules/@stdlib/iter/cunone/README.md

@@ -0,0 +1,146 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2024 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.
+
+-->
+
+# iterCuNone
+
+> Create an [iterator][mdn-iterator-protocol] which cumulatively tests whether every iterated value is falsy.
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+```javascript
+var iterCuNone = require( '@stdlib/iter/cunone' );
+```
+```javascript
+iterCuNone( iterator )
+Returns an iterator which cumulatively tests whether every iterated value is falsy.
+javascriptvar array2iterator = require( '@stdlib/array/to-iterator' );
+
+var arr = array2iterator( [ false, null, undefined, '', 0, NaN, true ] );
+
+var it = iterCuNone( arr );
+// returns <Object>
+
+var v = it.next().value;
+// returns true
+
+v = it.next().value;
+// returns true
+
+v = it.next().value;
+// returns true
+
+v = it.next().value;
+// returns true
+
+v = it.next().value;
+// returns true
+
+v = it.next().value;
+// returns true
+
+v = it.next().value;
+// returns false
+
+var bool = it.next().done;
+// returns true
+```
+The returned iterator protocol-compliant object has the following properties:
+
+next: function which returns an iterator protocol-compliant object containing the next iterated value (if one exists) assigned to a value property and a done property having a boolean value indicating whether the iterator is finished.
+return: function which closes an iterator and returns a single (optional) argument in an iterator protocol-compliant object.
+
+</section>
+<!-- /.usage -->
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+<section class="notes">
+
+## Notes
+
+
+
+- If an environment supports `Symbol.iterator` and the provided iterator is iterable, the returned iterator is iterable.
+- In JavaScript, falsy values are `false`, `null`, `undefined`, `0`, `NaN`, and an empty string (`""`).
+
+</section>
+<!-- /.notes -->
+<!-- Package usage examples. -->
+<section class="examples">
+
+## Examples
+<!-- eslint no-undef: "error" -->
+```javascript
+
+var randu = require( '@stdlib/random/iter/randu' );
+var iterMap = require( '@stdlib/iter/map' );
+var iterCuNone = require( '@stdlib/iter/cunone' );
+
+// Create an iterator which generates uniformly distributed pseudorandom numbers:
+var rand = randu({
+    'iter': 100
+});
+
+// Create an iterator which applies a threshold to generated numbers:
+var it = iterMap( rand, function threshold( r ) {
+    return ( r > 0.95 );
+});
+
+// Create an iterator which cumulatively tests whether all values are "falsy":
+var result = iterCuNone( it );
+
+// Perform manual iteration...
+var v;
+while ( true ) {
+    v = result.next();
+    if ( v.done ) {
+        break;
+    }
+    console.log( v.value );
+}
+```
+</section>
+<!-- /.examples -->
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+<section class="references">
+</section>
+<!-- /.references -->
+<!-- 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">
+<!-- <related-links> -->
+<!-- </related-links> -->
+</section>
+<!-- /.links -->

lib/node_modules/@stdlib/iter/cunone/benchmark/benchmark.js

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+/** * @license Apache-2.0 
+ * * * Copyright (c) 2024 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 isBoolean = require( '@stdlib/assert-is-boolean' ).isPrimitive;
+var isIteratorLike = require( '@stdlib/assert-is-iterator-like' );
+var pkg = require( './../package.json' ).name;
+var iterCuNone = require( './../lib' );
+
+// FUNCTIONS //
+
+function createIterator( arr ) {
+	var len;
+	var it;
+	var i;
+
+	len = arr.length;
+	i = -1;
+	it = {};
+	it.next = next;
+	it.reset = reset;
+
+	return it;
+
+	function next() {
+		i += 1;
+		if ( i < len ) {
+			return { 'value': arr[ i ], 'done': false };
+		}
+		return { 'done': true };
+	}
+
+	function reset() {
+		i = -1;
+	}
+}
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var iter;
+	var arr;
+	var i;
+
+	arr = [ 0, 0, 0, 0, 0, 1 ];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		iter = iterCuNone( createIterator( arr ) );
+		if ( typeof iter !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+
+	if ( !isIteratorLike( iter ) ) {
+		b.fail( 'should return an iterator protocol-compliant object' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( pkg+'::iteration', function benchmark( b ) {
+	var iter;
+	var arr;
+	var i;
+	var v;
+
+	arr = [ 0, 0, 0, 0, 0, 1 ];
+	iter = iterCuNone( createIterator( arr ) );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		v = iter.next().value;
+		if ( typeof v !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+
+	if ( !isBoolean( v ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/iter/cunone/docs/repl.txt

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+{{alias}}( iterator )
+    Returns an iterator which cumulatively tests whether every iterated value is
+    falsy.
+
+    The returned iterator immediately returns `false` upon encountering a truthy
+    value, for all subsequent iterations.
+
+    If provided an iterator which does not return any iterated values, the
+    returned iterator returns `true`.
+
+    Parameters
+    ----------
+    iterator: Object
+        Input iterator over which to iterate.
+
+    Returns
+    -------
+    iterator: Object
+        Iterator.
+
+    Iterator Protocol
+    -----------------
+    The returned iterator protocol-compliant object has the following properties:
+
+    next: Function
+        Returns an iterator protocol-compliant object containing the next
+        iterated value (if one exists) assigned to a `value` property and a
+        `done` property having a boolean value indicating whether the iterator
+        is finished.
+
+    return: Function
+        Finishes an iterator and returns a single (optional) argument in an
+        iterator protocol-compliant object.
+
+    Examples
+    --------
+    > var arr = {{alias:@stdlib/array/to-iterator}}( [ 0, 0, 0, 0, 1 ] );
+    > var it = {{alias}}( arr )
+    > var v = it.next().value
+    true
+    > v = it.next().value
+    true
+    > v = it.next().value
+    true
+    > v = it.next().value
+    true
+    > v = it.next().value
+    false
+    > var bool = it.next().done
+    true
+
+    See Also
+    --------

lib/node_modules/@stdlib/iter/cunone/docs/types/index.d.ts

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+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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
+
+/// <reference types="@stdlib/types"/>
+
+import { Iterator as Iter, IterableIterator } from '@stdlib/types/iter';
+
+// Define a union type representing both iterable and non-iterable iterators:
+type Iterator = Iter | IterableIterator;
+
+/**
+* Returns an iterator which cumulatively tests whether every iterated value is falsy.
+*
+* @param iterator - input iterator
+* @returns iterator
+*
+* @example
+* var array2iterator = require( '@stdlib/array-to-iterator' );
+*
+* var it = iterCuNone( array2iterator( [ false, null, undefined, '', 0, NaN, true ] ) );
+* // returns <Object>
+*
+* var v = it.next().value;
+* // returns true
+*
+* v = it.next().value;
+* // returns true
+*
+* v = it.next().value;
+* // returns true
+*
+* v = it.next().value;
+* // returns true
+*
+* v = it.next().value;
+* // returns true
+*
+* v = it.next().value;
+* // returns true
+*
+* v = it.next().value;
+* // returns false
+*
+* var bool = it.next().done;
+* // returns true
+*/
+declare function iterCuNone( iterator: Iterator ): Iterator;
+
+
+// EXPORTS //
+
+export = iterCuNone;