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  • Blog Post: Past performance is no guarantee of future results

    Before I get started today, a couple housekeeping notes. First off, sorry for no blog the last three weeks; I have been crazy busy adding features to the Roslyn C# semantic analyzer. More on that in an upcoming episode. Second, check out the snazzy new Developer Tools blog aggregation page ; it's one...
  • Blog Post: GUID guide, part three

    Let's recap: a GUID is a 128 bit integer that is used as a globally unique identifier. GUIDs are not a security system; they do not guarantee uniqueness in a world where hostile parties are deliberately attempting to cause collisions; rather, they provide a cheap and easy way for mutually benign parties...
  • Blog Post: GUID guide, part two

    So how is it that a GUID can be guaranteed to be unique without some sort of central authority that ensures uniqueness, a la the ISBN system? Well, first off, notice that the number of possible GUIDs is vastly larger than the number of possible ISBNs. Because the last of the thirteen digits is a checksum...
  • Blog Post: GUID Guide, part one

    What is a GUID? The acronym stands for "globally unique identifier"; GUIDs are also called UUIDs, which stands for "universally unique identifier". (It is unclear to me why we need two nigh-identical names for the same thing, but there you have it.) A GUID is essentially a 128 bit integer, and when written...
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