As I understand ArrayBuffer length is set only by constructor and cannot be changed dynamically. So I am curious, is it possible using websockets binary data messages send arraybuffer certain part, not whole buffer?
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2 Answers
You can use .slice to slice an ArrayBuffer: http://jsfiddle.net/rtaB4/21/.
var inputBuffer = new Uint8Array([0, 1, 2, 3, 4]).buffer;
var outputBuffer = inputBuffer.slice(1, 3);
console.log(outputBuffer.byteLength); // 2
console.log(new Uint8Array(outputBuffer)); // [1, 2]
4 Comments
Demion
Websocket can only send ArrayBuffer not Uint8Array or others
pimvdb
@Demion: I know, the input and output is an
ArrayBuffer here (origBuffer and buffer).pimvdb
@konga raju: Thanks for the heads up!
ElSajko
But slice produce new Array. This is not GC-Friendly. Does anyone knows better way?
Read these articles the specification was changed.
http://www.html5rocks.com/en/tutorials/webgl/typed_arrays/
http://updates.html5rocks.com/2012/06/How-to-convert-ArrayBuffer-to-and-from-String
