time-to-botec/js/node_modules/@stdlib/assert/is-binary-string/README.md

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# isBinaryString

> Test if a value is a binary string.

<section class="usage">

## Usage

```javascript
var isBinaryString = require( '@stdlib/assert/is-binary-string' );
```

#### isBinaryString( value )

Tests if a `value` is a binary `string`; i.e., a character sequence of `1`'s and `0`'s.

```javascript
var bool = isBinaryString( '1000101' );
// returns true

bool = isBinaryString( 'beep' );
// returns false

bool = isBinaryString( '' );
// returns false
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var isBinaryString = require( '@stdlib/assert/is-binary-string' );

var bool = isBinaryString( '1' );
// returns true

bool = isBinaryString( '0' );
// returns true

bool = isBinaryString( '101010101001' );
// returns true

bool = isBinaryString( '' );
// returns false

bool = isBinaryString( 'beep' );
// returns false

bool = isBinaryString( null );
// returns false
```

</section>

<!-- /.examples -->

* * *

<section class="cli">

## CLI

<section class="usage">

### Usage

```text
Usage: is-binary-string [options] [<string>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
```

</section>

<!-- /.usage -->

<section class="examples">

### Examples

```bash
$ is-binary-string 01234
false
```

To use as a [standard stream][standard-streams],

```bash
$ echo -n '0110' | is-binary-string
true
```

</section>

<!-- /.examples -->

</section>

<!-- /.cli -->

<section class="links">

[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams

</section>

<!-- /.links -->