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- programming languages - What is a Namespace? - Stack Overflow
I am going to provide a more commonplace description Say my wife has a sister named Sue, and so do I How can I tell them apart in a conversation? By using their last names ("Sue Larson" vs "Sue Jones") The last name is the namespace This is a limited example of course, and in programming, the potential family members may be far more numerous than my example, therefore the potential for
- java - What is a JavaBean exactly? - Stack Overflow
A JavaBean is just a standard It is a regular Java class, except it follows certain conventions: All properties are private (use getters setters) A public no-argument constructor Implements Serializable That's it It's just a convention Lots of libraries depend on it though With respect to Serializable, from the API documentation: Serializability of a class is enabled by the class
- multithreading - What is a thread (really)? - Stack Overflow
I have been trying to find a good definition, and get an understanding, of what a thread really is It seems that I must be missing something obvious, but every time I read about what a thread is,
- python - What is a NoneType object? - Stack Overflow
TypeError: cannot concatenate 'str' and 'NoneType' objects I'm pretty sure the 'str' means string, but I dont know what a 'NoneType' object is My script craps out on the second line, I know the first one works because the commands from that line are in my asa as I would expect At first I thought it may be because I'm using variables and user input inside send_command Everything in 'CAPS
- What exactly is GUID? Why and where I should use it?
GUID technically stands for globally unique identifier What it is, actually, is a 128 bit structure that is unlikely to ever repeat or create a collision If you do the maths, the domain of values is in the undecillions Use guids when you have multiple independent systems or clients generating ID's that need to be unique For example, if I have 5 client apps creating and inserting
- security - What is a keytab exactly? - Stack Overflow
To answer your two questions: every user and service does not need a keytab file keytabs use symmetric key cryptography I'm going to explain a bit more based on my understanding on how keytabs are used in mixed networks of Windows and non-Windows systems using Active Directory as the directory service If the directory service is something other than AD, which is the most popular directory
- java - What exactly does a jar file contain? - Stack Overflow
However, I got curious to what each class contained and when I try to open one of the classes in the jar file, it tells me that I need a source file A jar file is basically a zip file containing class files and potentially other resources (and metadata about the jar itself) It's hard to compare C to Java really, as Java byte code maintains a lot more metadata than most binary formats - but
- c++ - What is a char*? - Stack Overflow
The char type can only represent a single character When you have a sequence of characters, they are piled next to each other in memory, and the location of the first character in that sequence is returned (assigned to test) Test is nothing more than a pointer to the memory location of the first character in "testing", saying that the type it points to is a char
- What is the difference between a directory and a folder?
Check "The folder metaphor" section at Wikipedia It states: There is a difference between a directory, which is a file system concept, and the graphical user interface metaphor that is used to represent it (a folder) For example, Microsoft Windows uses the concept of special folders to help present the contents of the computer to the user in a fairly consistent way that frees the user from
- browser - What is a MIME type? - Stack Overflow
A MIME type is a label used to identify a type of data It is used so software can know how to handle the data It serves the same purpose on the Internet that file extensions do on Microsoft Windows So if a server says "This is text html" the client can go "Ah, this is an HTML document, I can render that internally", while if the server says "This is application pdf" the client can go "Ah, I
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