README.md (4173B)
1 <!-- 2 3 @license Apache-2.0 4 5 Copyright (c) 2020 The Stdlib Authors. 6 7 Licensed under the Apache License, Version 2.0 (the "License"); 8 you may not use this file except in compliance with the License. 9 You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13 Unless required by applicable law or agreed to in writing, software 14 distributed under the License is distributed on an "AS IS" BASIS, 15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 See the License for the specific language governing permissions and 17 limitations under the License. 18 19 --> 20 21 # iterZeta 22 23 > Create an [iterator][mdn-iterator-protocol] which evaluates the [Riemann zeta][@stdlib/math/base/special/zeta] function for each iterated value. 24 25 <!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. --> 26 27 <section class="intro"> 28 29 </section> 30 31 <!-- /.intro --> 32 33 <!-- Package usage documentation. --> 34 35 <section class="usage"> 36 37 ## Usage 38 39 ```javascript 40 var iterZeta = require( '@stdlib/math/iter/special/riemann-zeta' ); 41 ``` 42 43 #### iterZeta( iterator ) 44 45 Returns an [iterator][mdn-iterator-protocol] which iteratively evaluates the [Riemann zeta][@stdlib/math/base/special/zeta] function. 46 47 ```javascript 48 var array2iterator = require( '@stdlib/array/to-iterator' ); 49 50 var it = iterZeta( array2iterator( [ 1.1, -4.0 ] ) ); 51 // returns <Object> 52 53 var v = it.next().value; 54 // returns ~10.584 55 56 v = it.next().value; 57 // returns 0.0 58 59 // ... 60 ``` 61 62 The returned [iterator][mdn-iterator-protocol] protocol-compliant object has the following properties: 63 64 - **next**: function which returns an [iterator][mdn-iterator-protocol] 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. 65 - **return**: function which closes an [iterator][mdn-iterator-protocol] and returns a single (optional) argument in an [iterator][mdn-iterator-protocol] protocol-compliant object. 66 67 </section> 68 69 <!-- /.usage --> 70 71 <!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. --> 72 73 <section class="notes"> 74 75 ## Notes 76 77 - If an iterated value is non-numeric (including `NaN`), the returned [iterator][mdn-iterator-protocol] returns `NaN`. If non-numeric iterated values are possible, you are advised to provide an [`iterator`][mdn-iterator-protocol] which type checks and handles non-numeric values accordingly. 78 - If an environment supports `Symbol.iterator` **and** a provided [iterator][mdn-iterator-protocol] is iterable, the returned [iterator][mdn-iterator-protocol] is iterable. 79 80 </section> 81 82 <!-- /.notes --> 83 84 <!-- Package usage examples. --> 85 86 <section class="examples"> 87 88 ## Examples 89 90 <!-- eslint no-undef: "error" --> 91 92 ```javascript 93 var uniform = require( '@stdlib/random/iter/uniform' ); 94 var iterZeta = require( '@stdlib/math/iter/special/riemann-zeta' ); 95 96 // Create a seeded iterator for generating pseudorandom numbers: 97 var rand = uniform( 1.1, 50.0, { 98 'seed': 1234, 99 'iter': 10 100 }); 101 102 // Create an iterator which consumes the pseudorandom number iterator: 103 var it = iterZeta( rand ); 104 105 // Perform manual iteration... 106 var v; 107 while ( true ) { 108 v = it.next(); 109 if ( v.done ) { 110 break; 111 } 112 console.log( v.value ); 113 } 114 ``` 115 116 </section> 117 118 <!-- /.examples --> 119 120 <!-- 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. --> 121 122 <section class="references"> 123 124 </section> 125 126 <!-- /.references --> 127 128 <!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --> 129 130 <section class="links"> 131 132 [mdn-iterator-protocol]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterator_protocol 133 134 [@stdlib/math/base/special/zeta]: https://www.npmjs.com/package/@stdlib/math/tree/main/base/special/zeta 135 136 </section> 137 138 <!-- /.links -->