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Keeping ASP.NET Session Open / Alive

Which is the easiest and most unobstrusive way to keep an ASP.NET session alive as long as the user has the browser window open? Is it timed AJAX calls? I want to prevent the following: sometimes users keep their window open for a long time, then enter stuff, and on submit nothing works anymore beca...
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Division of integers in Java [duplicate]

This is a basic question but I can't find an answer. I've looked into floating point arithmetic and a few other topics but nothing has seemed to address this. I'm sure I just have the wrong terminology. ...
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Should one use < or

... The first is more idiomatic. In particular, it indicates (in a 0-based sense) the number of iterations. When using something 1-based (e.g. JDBC, IIRC) I might be tempted to use &lt;=. So: for (int i=0; i &lt; count; i++) // For 0-base...
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How can I change the color of a Google Maps marker?

...think, would be to change the color of the marker to blue, instead of red. Is this a simple thing to do or do I have to create a whole new icon somehow? If I do have to create a new icon, what's the easiest way to do that? ...
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Where is Xcode's build folder?

... ~/Library/Developer/Xcode/DerivedData is now the default. You can set the prefs in Xcode to allow projects to specify their build directories. share | improve th...
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Detect the Enter key in a text input field

I'm trying to do a function if enter is pressed while on specific input. 10 Answers 10...
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Comparing two java.util.Dates to see if they are in the same day

...te s (e.g. date1 and date2 ) and come up with a boolean sameDay which is true of the two Date s share the same day, and false if they are not. ...
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typedef struct vs struct definitions [duplicate]

...g typedef . It seems to me like there's really no difference, they accomplish the same goal. 12 Answers ...
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“Private” (implementation) class in Python

... Use a single underscore prefix: class _Internal: ... This is the official Python convention for 'internal' symbols; "from module import *" does not import underscore-prefixed objects. Edit: Reference to the single underscore convention ...
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Is it possible to specify a different ssh port when using rsync?

... share | improve this answer | follow | answered Jan 1 '14 at 15:42 Joao CostaJoao Costa ...