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C++ sorting and keeping track of indexes

Using C++, and hopefully the standard library, I want to sort a sequence of samples in ascending order, but I also want to remember the original indexes of the new samples. ...
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No tests found with test runner 'JUnit 4'

My Java test worked well from Eclipse. But now, when I relaunch test from the run menu, I get the following message: 41 An...
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Which library should I use for server-side image manipulation on Node.JS? [closed]

I found a quite large list of available libraries on Node.JS wiki but I'm not sure which of those are more mature and provide better performance. Basically I want to do the following: ...
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How to save all the variables in the current python session?

I want to save all the variables in my current python environment. It seems one option is to use the 'pickle' module. However, I don't want to do this for 2 reasons: ...
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FileSystemWatcher Changed event is raised twice

I have an application where I am looking for a text file and if there are any changes made to the file I am using the OnChanged eventhandler to handle the event. I am using the NotifyFilters.LastWriteTime but still the event is getting fired twice. Here is the code. ...
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A clean, lightweight alternative to Python's twisted? [closed]

A (long) while ago I wrote a web-spider that I multithreaded to enable concurrent requests to occur at the same time. That was in my Python youth, in the days before I knew about the GIL and the associated woes it creates for multithreaded code (IE, most of the time stuff just ends up serialized!...
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Possible reasons for timeout when trying to access EC2 instance

I cannot SSH into my instance - Operation timed out. What could be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst ...
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How to avoid java.util.ConcurrentModificationException when iterating through and removing elements

I have an ArrayList that I want to iterate over. While iterating over it I have to remove elements at the same time. Obviously this throws a java.util.ConcurrentModificationException . ...
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Why is there no tuple comprehension in Python?

As we all know, there's list comprehension, like 10 Answers 10 ...
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Changing the default folder in Emacs

I am fairly new to Emacs and I have been trying to figure out how to change the default folder for C-x C-f on start-up. For instance when I first load Emacs and hit C-x C-f its default folder is C:\emacs\emacs-21.3\bin , but I would rather it be the desktop. I believe there is some way to custo...