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Query EC2 tags from within instance
...tag on it.
Assumes EC2_PRIVATE_KEY and EC2_CERT environment variables are set.
ec2-describe-tags \
--filter "resource-type=instance" \
--filter "resource-id=$(ec2-metadata -i | cut -d ' ' -f2)" \
--filter "key=Name" | cut -f5
This returns Foo.
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Any reason to clean up unused imports in Java, other than reducing clutter?
...ant additions that could explain this. After attempting to increase memory settings (this is running a 64 bit JVM on a 64 bit CentOS!) to something well beyond where the clients could compile, I examined the checkins one by one.
There was an improper import that a developer had used and abandoned (...
How many database indexes is too many?
...ng indexes before updating a table, then recreating them, you will have to set the index up for monitoring again, and you'll lose any monitoring history for that index.
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How to safely call an async method in C# without await
I have an async method which returns no data:
11 Answers
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Determining the current foreground application from a background task or service
...o the caller. For backwards compatibility, it will still return a small subset of its data: at least the caller's own tasks, and possibly some other tasks such as home that are known to not be sensitive.
– Sam Lu
Jun 29 '14 at 6:11
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Static Initialization Blocks
As far as I understood the "static initialization block" is used to set values of static field if it cannot be done in one line.
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Why shouldn't Java enum literals be able to have generic type parameters?
...two constructs by forcing the compiler to know that there are a limited subset of types that can be supplied to generic enums and introducing additional confusion to concept(Generics) that already seems elude a lot of programmers.
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What are the primary differences between TDD and BDD? [closed]
...ce in "old waterfall world" tests come after implementation, then this mindset leads to wrong understanding and behaviour.
BDD directs focus on behaviour and specification, and so waterfall minds are distracted. So BDD is more easily understood as design practice and not as testing practice.
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How to determine the memory footprint (size) of a variable?
... SensioLabs, the Symfony2 guys https://blackfire.io/
If you use puphpet to set up your virtual machine you'll be happy to know it's supported ;-)
Xdebug and tracing memory usage
XDEBUG2 is a extension for PHP. Xdebug allows you to log all function calls, including parameters and return values to a f...
Show dialog from fragment?
...tate) {
return new AlertDialog.Builder(getActivity())
.setTitle("Title")
.setMessage("Sure you wanna do this!")
.setNegativeButton(android.R.string.no, new OnClickListener() {
@Override
public void onClick(DialogInterface di...