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Mapping Stream data to data structures in C#


By : Dharmesh Mehta
Date : July 28 2020, 09:00 PM
This might help you Most people use .NET serialization (there is faster binary and slower XML formatter, they both depend on reflection and are version tolerant to certain degree)
However, if you want the fastest (unsafe) way - why not:
code :
YourStruct o = new YourStruct();
byte[] buffer = new byte[Marshal.SizeOf(typeof(YourStruct))];
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
Marshal.StructureToPtr(o, handle.AddrOfPinnedObject(), false);
handle.Free();
handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
o = (YourStruct)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(YourStruct));
handle.Free();


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Mapping C data structures and typedefs to .Net


By : user2355486
Date : March 29 2020, 07:55 AM
Hope that helps FieldOffsetAttribute may be of help to you, although there is no way to represent values smaller than a byte.
I would use a byte to represent the two values for interop purposes, and then access the value via property getters.
code :
unsafe struct MsgHeader
{
    public Nibble transportSpecific;
    //Enumeration4 messageType;
    //UInteger4 versionPTP;
    // use byte as place holder for these two fields
    public byte union;
    public ushort messageLength;
    public byte domainNumber;
    public fixed byte flagField[2];
    public long correctionfield;
    public PortIdentity sourcePortIdentity;
    public ushort sequenceId;
    public byte controlField;
    public sbyte logMessageInterval;

    // access value of two fields via getters
    public byte messageType { get { return (byte)(union >> 4); } }
    public byte versionPTP { get { return (byte)(union & 0xF); } }
}

how can I convert ruby data structures to javascript data structures with .js.erb?


By : user3660491
Date : March 29 2020, 07:55 AM
hope this fix your issue The problem was .to_json ecapes the html entities!
The solution was to do:
code :
{"lol": ["lmaonade", "rotflcopter"]}

Mapping java variables data to C Structures and write a c compatible file


By : logan
Date : March 29 2020, 07:55 AM
will be helpful for those in need There is no "C compatible file" format. If you have C structs written to disk file directly, then those are in an ad-hoc binary format. Exact format depends on things like packing and padding of the struct, byte order, word size of the CPU (like, 32 or 64 bit), etc.
So, start by defining the format, then forget it is produced by C.

Why knockout.mapping fails on some data-structures?


By : user19150
Date : March 29 2020, 07:55 AM
will help you Using knockout.mapping I try to map from JSON to ko-object. When trying to use more advanced solutions with mapping options I often got Uncaught TypeError: g is not a function. I tried to figure out what is problem, but I am still confused. , I've succesfully reproduced the issue you mentioned:
code :
var data1 = { // works
  a: "a",
  b: [ 
    { b1: "v1" }, 
    { b2: "v2" } 
  ] 
};

var data2 = { // Uncaught TypeError: g is not a function
  a: "a",
  b: [ 
    { b1: { name: "v1" } }, 
    { b2: { name: "v2" } } 
  ]
};

function viewModel ( data ) {
  var self = this;
  var a = ko.mapping.fromJS( data, { observe: ["a"]} );
  return a;
}

var vm1 = viewModel( data1 ); // works
var vm2 = viewModel( data2 ); // Uncaught TypeError: g is not a function
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-debug.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout.mapping/2.4.1/knockout.mapping.js"></script>
if(options.observe.length > 0 && ko.utils.arrayIndexOf(options.observe, fullPropertyName) == -1)
{
    mappedRootObject[indexer] = value(); // <---- THIS LINE
    options.copiedProperties[fullPropertyName] = true;
    return;
}
if(options.observe.length > 0 && ko.utils.arrayIndexOf(options.observe, fullPropertyName) == -1)
{
    mappedRootObject[indexer] = ko.utils.unwrapObservable(value); // <-- DIFFERENT
    options.copiedProperties[fullPropertyName] = true;
    return;
}

Data Structures and their Database Mapping in .Net


By : Justin Anthony Munoz
Date : March 29 2020, 07:55 AM
Hope this helps Can you define "complex data structures"? I've never found something that could be represented in SQL that couldn't be represented in .NET.
It sounds like you're just looking for an ORM for some forms over data. Take a look at NHibernate or Entity Framework. They essentially help you create a mapping graph between business objects and data persistence.
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