README.md (2870B)
1 <!-- 2 3 @license Apache-2.0 4 5 Copyright (c) 2018 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 # until 22 23 > Invoke a function until a test condition is true. 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 until = require( '@stdlib/utils/until' ); 41 ``` 42 43 #### until( predicate, fcn\[, thisArg ] ) 44 45 Invokes a `function` until a `predicate` function returns `true`. 46 47 ```javascript 48 function predicate( i ) { 49 return ( i >= 5 ); 50 } 51 52 function beep( i ) { 53 console.log( 'boop: %d', i ); 54 } 55 56 until( predicate, beep ); 57 /* => 58 boop: 0 59 boop: 1 60 boop: 2 61 boop: 3 62 boop: 4 63 */ 64 ``` 65 66 Both the `predicate` function and the `function` to invoke are provided a single argument: 67 68 - `i`: iteration number (starting from zero) 69 70 To set the function execution context for the invoked function, provide a `thisArg`. 71 72 ```javascript 73 function predicate( i ) { 74 return ( i >= 5 ); 75 } 76 77 function count() { 78 this.count += 1; 79 } 80 81 var context = { 82 'count': 0 83 }; 84 85 until( predicate, count, context ); 86 87 console.log( context.count ); 88 // => 5 89 ``` 90 91 </section> 92 93 <!-- /.usage --> 94 95 <!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. --> 96 97 <section class="notes"> 98 99 </section> 100 101 <!-- /.notes --> 102 103 <!-- Package usage examples. --> 104 105 <section class="examples"> 106 107 ## Examples 108 109 <!-- eslint no-undef: "error" --> 110 111 ```javascript 112 var randu = require( '@stdlib/random/base/randu' ); 113 var until = require( '@stdlib/utils/until' ); 114 115 function predicate() { 116 return ( randu() <= 0.05 ); 117 } 118 119 function log( i ) { 120 console.log( i ); 121 } 122 123 until( predicate, log ); 124 ``` 125 126 </section> 127 128 <!-- /.examples --> 129 130 <!-- 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. --> 131 132 <section class="references"> 133 134 </section> 135 136 <!-- /.references --> 137 138 <!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --> 139 140 <section class="links"> 141 142 </section> 143 144 <!-- /.links -->