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Make sure only a single instance of a program is running
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The following code should do the job, it is cross-platform and runs on Python 2.4-3.2. I tested it on Windows, OS X and Linux.
from tendo import singleton
me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running
The latest code version is available sing...
Java 8 stream's .min() and .max(): why does this compile?
Note: this question originates from a dead link which was a previous SO question, but here goes...
5 Answers
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Explain the concept of a stack frame in a nutshell
...me would represent a function call and its argument data.
If I remember correctly, the function return address is pushed onto the stack first, then the arguments and space for local variables. Together, they make the "frame," although this is likely architecture-dependent. The processor knows how ...
Why does GCC generate such radically different assembly for nearly the same C code?
...d some very odd behaviour in GCC 4.6.1 . Let me show you the code first (for clarity I marked the differences):
3 Answers
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Docker and securing passwords
...play around with and one thing that keeps nagging me has been putting passwords in a Dockerfile. I'm a developer so storing passwords in source feels like a punch in the face. Should this even be a concern? Are there any good conventions on how to handle passwords in Dockerfiles?
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How to write trycatch in R
I want to write trycatch code to deal with error in downloading from the web.
5 Answers
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How can I control the width of a label tag?
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@Konrad Then the OP can use float or display: inline-block
– Josh Stodola
May 12 '10 at 16:08
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Define: What is a HashSet?
HashSet
The C# HashSet data structure was introduced in the .NET Framework 3.5. A full list of the implemented members can be found at the HashSet MSDN page.
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What is global::?
...mespace, it can be used to solve problems whereby you may redefine types. For example:
class foo
{
class System
{
}
}
If you were to use System where it would be locally scoped in the foo class, you could use:
global::System.Console.WriteLine("foobar");
to access the global names...
Can local storage ever be considered secure? [closed]
I'm required to develop a web application that will function offline for long periods. In order for this to be viable I cannot avoid saving sensitive data (personal data but not the kind of data you would only store hashed) in local storage.
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