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Check to see if python script is running
I have a python daemon running as a part of my web app/ How can I quickly check (using python) if my daemon is running and, if not, launch it?
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Why do we need a pure virtual destructor in C++?
I understand the need for a virtual destructor. But why do we need a pure virtual destructor? In one of the C++ articles, the author has mentioned that we use pure virtual destructor when we want to make a class abstract.
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Force update of an Android app when a new version is available
I have an app in Google Play Store. When an update version is available, the older version will become unusable – that is, if users do not update the app, they do not enter in the app. How can I force users to update the app when a new version becomes available?
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How to use the PI constant in C++
I want to use the PI constant and trigonometric functions in some C++ program. I get the trigonometric functions with include <math.h> . However, there doesn't seem to be a definition for PI in this header file.
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How to find the key of the largest value hash?
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“Auth Failed” error with EGit and GitHub
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I noticed that after setting up the SSH key as you describe I should not be changing the username/password in the authentication box (I was putting my GitHub credentials). The default in this box is username:git and password is blank.
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Changing the case of a string in Eclipse
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Why is there no Tree class in .NET?
...> : Dictionary<K, MyTree<K, V>>
{
public V Value { get; set; }
}
Or unkeyed:
public class MyTree<V> : HashSet<MyTree<V>>
{
public V Value { get; set; }
}
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What is the http-header “X-XSS-Protection”?
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IE8 has the filter activated by default, but servers can switch if off by setting
X-XSS-Protection: 0
See also http://blogs.msdn.com/b/ieinternals/archive/2011/01/31/controlling-the-internet-explorer-xss-filter-with-the-x-xss-protection-http-header.aspx
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What is the purpose of a plus symbol before a variable?
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