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Thread: DataType

  1. #1
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    Re: DataType

    GUID - global unique identifier.
    I had to find out info about this some months ago and remember that www.whatis.com was a good reference site to start from. May be able to tell you about the other data types too.

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  2. #2
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    DataType

    Does any one know any thing about the following datatype:

    1- Enumeration
    2- Collection
    3- GUID
    4- DataSet

    Thank you in advance

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  3. #3
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    Re: DataType

    thank you, its a great website

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  4. #4
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    Re: DataType

    Enumeration

    The enumeration interface is java specific. An object implementing the Enumeration interface generates a series of elements, one at a time. A method like the nextElement method will return successive elements of the series on successive calls.
    Possible usages are for enumerating through the elements of a vector, the keys of a hashtable or the values in one.

    Collection
    A collection is an object that contains a set of related objects. They are implemented in VB - although we have Collection classes in MFC too.

    GUID
    This is a Universal Unique identifier - a 128-bit number generated by a utility like GUIDGEN.EXE (one of the tools that ship with MS DevStudio). The generation logic is such that it takes into account the IP of the machine on which it is being generated and creates a unique number. It is used to identify objects OLE servers, interfaces, manager entry-point vectors, and client objects. They are also used in cross-process communication, such as remote procedure calling (RPC) and OLE.

    DataSet
    I assume this means the OLE DB for OLAP dataset object. That one is an abstraction for a multi-dimensional result set.


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    Re: DataType

    GUID is generated using the MAC address of the computer. This is hardware based and should be unique to each network card. If there is no MAC address, there is a method to generate a substitute. It is also unique in time down to 100 millisecond intervals.

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  6. #6
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    Re: DataType

    Hi!
    Collection - Contains some set of objects.


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    Palani.
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    Palani.
    http://tips-testing.blogspot.com/index.html
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