time-to-botec

README.md (5469B)

---

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 # ArrayBuffer
 
 > [Constructor][mdn-arraybuffer] which returns an object used to represent a generic, fixed-length raw binary data buffer.
 
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 ## Usage
 
 ```javascript
 var ArrayBuffer = require( '@stdlib/array/buffer' );
 ```
 
 #### ArrayBuffer( size )
 
 Returns an [`ArrayBuffer`][mdn-arraybuffer] having a specified number of bytes.
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var buf = new ArrayBuffer( 5 );
 // returns <ArrayBuffer>
 ```
 
 * * *
 
 ### Properties
 
 #### ArrayBuffer.length
 
 Number of input arguments the constructor accepts.
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var len = ArrayBuffer.length;
 // returns 1
 ```
 
 #### ArrayBuffer.prototype.byteLength
 
 **Read-only** property which returns the length (in bytes) of the [`ArrayBuffer`][mdn-arraybuffer].
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var buf = new ArrayBuffer( 5 );
 var byteLength = buf.byteLength;
 // returns 5
 ```
 
 * * *
 
 ### Methods
 
 #### ArrayBuffer.isView( arr )
 
 Static method which returns a `boolean` indicating if provided a buffer view.
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var Float64Array = require( '@stdlib/array/float64' );
 var view = new Float64Array( 10 );
 
 var bool = ArrayBuffer.isView( view );
 // returns true
 ```
 
 #### ArrayBuffer.prototype.slice( \[start\[, end]] )
 
 Copies the bytes of an `ArrayBuffer` to a new [`ArrayBuffer`][mdn-arraybuffer].
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var b1 = new ArrayBuffer( 10 );
 
 var b2 = b1.slice();
 // returns <ArrayBuffer>
 
 var bool = ( b2 === b1 );
 // returns false
 ```
 
 By default, the method copies from the beginning of the [`ArrayBuffer`][mdn-arraybuffer]. To beginning copying from a different byte index, provide a `start` argument, specifying the starting byte index (inclusive).
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var b1 = new ArrayBuffer( 10 );
 var b2 = b1.slice( 2 );
 
 var nbytes = b2.byteLength;
 // returns 8
 ```
 
 If `start < 0`, the index is relative to the end of the [`ArrayBuffer`][mdn-arraybuffer].
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var b1 = new ArrayBuffer( 10 );
 var b2 = b1.slice( -2 );
 
 var nbytes = b2.byteLength;
 // returns 2
 ```
 
 By default, the method copies to the end of the [`ArrayBuffer`][mdn-arraybuffer]. To copy until a particular byte index, provide an `end` index, specifying the ending byte index (exclusive).
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var b1 = new ArrayBuffer( 10 );
 var b2 = b1.slice( 2, 6 );
 
 var nbytes = b2.byteLength;
 // returns 4
 ```
 
 If `end < 0`, the index is relative to the end of the [`ArrayBuffer`][mdn-arraybuffer].
 
 <!-- eslint-disable stdlib/require-globals -->
 
 ```javascript
 var b1 = new ArrayBuffer( 10 );
 var b2 = b1.slice( 2, -2 );
 
 var nbytes = b2.byteLength;
 // returns 6
 ```
 
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 * * *
 
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 ## Examples
 
 <!-- eslint no-undef: "error" -->
 
 ```javascript
 var randu = require( '@stdlib/random/base/randu' );
 var Float64Array = require( '@stdlib/array/float64' );
 var Uint8Array = require( '@stdlib/array/uint8' );
 var toBinaryString = require( '@stdlib/number/uint8/base/to-binary-string' );
 var ArrayBuffer = require( '@stdlib/array/buffer' );
 
 var bytes;
 var buf;
 var arr;
 var i;
 
 // Create a new ArrayBuffer:
 buf = new ArrayBuffer( 64 );
 
 // Create a Float64 array buffer view:
 arr = new Float64Array( buf.byteLength/8 );
 for ( i = 0; i < arr.length; i++ ) {
     arr[ i ] = randu() * 100.0;
 }
 
 // Create a "bytes" view of the array buffer:
 bytes = new Uint8Array( arr.buffer );
 
 // Print the bytes:
 for ( i = 0; i < bytes.length; i++ ) {
     console.log( 'byte %d: %s', i, toBinaryString( bytes[ i ] ) );
 }
 ```
 
 </section>
 
 <!-- /.examples -->
 
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 [mdn-arraybuffer]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
 
 </section>
 
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