README.md (2249B)
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 # isBinaryString 22 23 > Test if a value is a binary string. 24 25 <section class="usage"> 26 27 ## Usage 28 29 ```javascript 30 var isBinaryString = require( '@stdlib/assert/is-binary-string' ); 31 ``` 32 33 #### isBinaryString( value ) 34 35 Tests if a `value` is a binary `string`; i.e., a character sequence of `1`'s and `0`'s. 36 37 ```javascript 38 var bool = isBinaryString( '1000101' ); 39 // returns true 40 41 bool = isBinaryString( 'beep' ); 42 // returns false 43 44 bool = isBinaryString( '' ); 45 // returns false 46 ``` 47 48 </section> 49 50 <!-- /.usage --> 51 52 <section class="examples"> 53 54 ## Examples 55 56 <!-- eslint no-undef: "error" --> 57 58 ```javascript 59 var isBinaryString = require( '@stdlib/assert/is-binary-string' ); 60 61 var bool = isBinaryString( '1' ); 62 // returns true 63 64 bool = isBinaryString( '0' ); 65 // returns true 66 67 bool = isBinaryString( '101010101001' ); 68 // returns true 69 70 bool = isBinaryString( '' ); 71 // returns false 72 73 bool = isBinaryString( 'beep' ); 74 // returns false 75 76 bool = isBinaryString( null ); 77 // returns false 78 ``` 79 80 </section> 81 82 <!-- /.examples --> 83 84 * * * 85 86 <section class="cli"> 87 88 ## CLI 89 90 <section class="usage"> 91 92 ### Usage 93 94 ```text 95 Usage: is-binary-string [options] [<string>] 96 97 Options: 98 99 -h, --help Print this message. 100 -V, --version Print the package version. 101 ``` 102 103 </section> 104 105 <!-- /.usage --> 106 107 <section class="examples"> 108 109 ### Examples 110 111 ```bash 112 $ is-binary-string 01234 113 false 114 ``` 115 116 To use as a [standard stream][standard-streams], 117 118 ```bash 119 $ echo -n '0110' | is-binary-string 120 true 121 ``` 122 123 </section> 124 125 <!-- /.examples --> 126 127 </section> 128 129 <!-- /.cli --> 130 131 <section class="links"> 132 133 [standard-streams]: https://en.wikipedia.org/wiki/Standard_streams 134 135 </section> 136 137 <!-- /.links -->