Typed Arrays

    /***********************************
    Typed Arrays in JavaScript

    Int8Array - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array
    -128 to 127

    Uint8Array - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array
    0 - 255

    Uint8ClampedArray - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray
    0 - 255
    
    Int16Array - like Int8Array but 16 bits in length
    -32768 to 32767
    Uint16Array - like Uint8Array but 16 bits in length
    0 to 65535
    
    Int32Array - like Int8Array but 32 bits in length
    -2147483648 to 2147483647
    Uint32Array - like Uint8Array but 32 bits in length
    0 to 4294967295
    
    Float32Array - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array
    1.2x10-38 to 3.4x10 38
    
    Float64Array - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array
    5.0x10 -324 to 1.8x10 308
    
    ArrayBuffer - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
    - used to represent a generic, fixed-length raw binary data buffer.
    
    DataView - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView
    
    Typed Arrays are used by: WebGL, Canvas, Web Audio API, XMLHttpRequests, Fetch API,  WebSockets, Web Workers, Media Source API and File APIs. 
    ***********************************/
    
    //new Int8Array(length(bytes) | buffer | TypedArray);
    // array of 8-bit integers
    // most Array methods are available on TypedArrays too
    
    let buffer = new ArrayBuffer(16);
    //create a 16 byte buffer
    
    let dv1 = new DataView(buffer);
    //create a DataView to be able to access/set whole buffer
    let dv2 = new DataView(buffer, 10, 3);
    //start at slot 10, get 3 bytes
    
    dv1.setInt8(11, 42);
    //put "42" in slot 11 of the buffer through view1
    let num = dv2.getInt8(1);
    console.log(num)
    console.log( dv2.getInt8(0))
    console.log( dv2.getInt8(2))
    //retrieve the 42 from the 2nd byte in view2 which was 
    //the 11th byte in the buffer