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What is the meaning of the term arena in relation to memory?

I'm reading a book on memory as a programming concept. In one of the later chapters, the author makes heavy use of the word arena , but never defines it. I've searched for the meaning of the word and how it relates to memory, and found nothing. Here are a few contexts in which the author uses the...
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Operational Transformation library?

I'm looking for a library that would allow me to synchronize text in real-time between multiple users (ala Google Docs). 14...
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How can I test https connections with Django as easily as I can non-https connections using 'runserv

I have an application that uses "secure" cookies and want to test it's functionality without needing to set up a complicated SSL enabled development server. Is there any way to do this as simply as I can test non-encrypted requests using ./manage.py runserver ? ...
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Running a command as Administrator using PowerShell?

You know how if you're the administrative user of a system and you can just right click say, a batch script and run it as Administrator without entering the administrator password? ...
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Why is argc not a constant?

As Effective C++ Item#3 states "Use const whenever possible", I start thinking "why not make these 'constant' parameters const "?. ...
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How to check if NSString begins with a certain character

How do you check if an NSString begins with a certain character (the character *). 10 Answers ...
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Set Django IntegerField by choices=… name

When you have a model field with a choices option you tend to have some magic values associated with human readable names. Is there in Django a convenient way to set these fields by the human readable name instead of the value? ...
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What does “O(1) access time” mean?

I have seen this term "O(1) access time" used to mean "quickly" but I don't understand what it means. The other term that I see with it in the same context is "O(n) access time". Could someone please explain in a simple way what these terms mean? ...
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#ifdef #ifndef in Java

I doubt if there is a way to make compile-time conditions in Java like #ifdef #ifndef in C++. 8 Answers ...
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Set environment variables from file of key/value pairs

TL;DR: How do I export a set of key/value pairs from a text file into the shell environment? 33 Answers ...