Page 152 - JavaScript

different bases and we would like to meaningfully extract that value). Because we just want a
textual representation, we do not care about heterogeneity as there is never a need to

A much better - and shorter - solution can be found using an UInt8Array typed array, which treats
the entire ArrayBuffer as composed of unsigned 8-bit integers:

function ArrayBufferToBinary(buffer) {
var uint8 = new Uint8Array(buffer);
return uint8.reduce((binary, uint8) => binary + uint8.toString(2), "");
}

Iterating through an arrayBuffer

For a convenient way to iterate through an arrayBuffer, you can create a simple iterator that
implements the DataView methods under the hood:

var ArrayBufferCursor = function() {
var ArrayBufferCursor = function(arrayBuffer) {
this.dataview = new DataView(arrayBuffer, 0);
this.size = arrayBuffer.byteLength;
this.index = 0;
}

ArrayBufferCursor.prototype.next = function(type) {
switch(type) {
case 'Uint8':
var result = this.dataview.getUint8(this.index);
this.index += 1;
return result;
case 'Int16':
var result = this.dataview.getInt16(this.index, true);
this.index += 2;
return result;
case 'Uint16':
var result = this.dataview.getUint16(this.index, true);
this.index += 2;
return result;
case 'Int32':
var result = this.dataview.getInt32(this.index, true);
this.index += 4;
return result;
case 'Uint32':
var result = this.dataview.getUint32(this.index, true);
this.index += 4;
return result;
case 'Float':
case 'Float32':
var result = this.dataview.getFloat32(this.index, true);
this.index += 4;
return result;
case 'Double':
case 'Float64':
var result = this.dataview.getFloat64(this.index, true);
this.index += 8;
return result;
default:
throw new Error("Unknown datatype");

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