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Change key pair for ec2 instance
...t Mcb. They perform actually the same thing but without wasting 1h of your time on doing the hilarious workaround. PS. See also stackoverflow.com/a/24143976/547223
– kgadek
Dec 9 '14 at 22:46
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How to implement the factory method pattern in C++ correctly
... thing in C++ which has been making me feel uncomfortable for quite a long time, because I honestly don't know how to do it, even though it sounds simple:
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What is the difference between JDK and JRE?
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The JRE is the Java Runtime Environment. It is a package of everything necessary to run a compiled Java program, including the Java Virtual Machine (JVM), the Java Class Library, the java command, and other infrastructure. However, it cannot be use...
PEP 8, why no spaces around '=' in keyword argument or a default parameter value?
Why does PEP 8 recommend not having spaces around = in a keyword argument or a default parameter value ?
6 Answers
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Guaranteed lifetime of temporary in C++?
Does C++ provide a guarantee for the lifetime of a temporary variable that is created within a function call but not used as a parameter? Here's an example class:
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When do I need to use AtomicBoolean in Java?
...hreads running through your
critical sections, a substantial
amount of CPU time is spent in
managing the synchronization
mechanism itself (waiting, notifying,
etc). Since the new API uses hardware
level constructs (atomic variables)
and wait and lock free algorithms to
implement thread-safety, a lot...
How to display unique records from a has_many through relationship?
...rder items to be sorted by which photo (each photo can be ordered multiple times and in different size prints). This then returns a hash with the product (photo) as the key and each time it was ordered can be listed in context of the photo (or not). Using this technique, you could actually output ...
Why does 'continue' behave like 'break' in a Foreach-Object?
...tiple of 7"
}
There is a gotcha to be kept in mind when refactoring. Sometimes one wants to convert a foreach statement block into a pipeline with a ForEach-Object cmdlet (it even has the alias foreach that helps to make this conversion easy and make mistakes easy, too). All continues should be re...
Difference between ProcessBuilder and Runtime.exec()
I'm trying to execute an external command from java code, but there's a difference I've noticed between Runtime.getRuntime().exec(...) and new ProcessBuilder(...).start() .
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How do I save and restore multiple variables in python?
...t which logins into a cloud server, in order to handle if I login multiple times over time, the server rejects my request. Does dumping an object into a file using pickle module may have any security issue? , for example where if someone obtain my dumped object, than they can login into my cloud-sto...