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Add Keypair to existing EC2 instance
...mote EC2 instance, however, seems distant and inaccessible when you are in one of these situations. Fortunately, AWS provides us with the power and flexibility to be able to recover a system like this, provided that we are running EBS boot instances and not instance-store.
The approach on EC2 is so...
Android: Difference between Parcelable and Serializable?
...eKey");
Parcelable
Parcelable process is much faster than Serializable. One of the reasons for this is that we are being explicit about the serialization process instead of using reflection to infer it. It also stands to reason that the code has been heavily optimized for this purpose.
Look at t...
bundler vs RVM vs gems vs RubyGems vs gemsets vs system ruby [closed]
...tion) and alternatives (such as JRuby or Rubinius). Note that RVM is not alone in this field, see for instance rbenv.
A gemset in RVM is a set of gems specific to a given context, typically a project. This is useful if you are for example developing different applications, each with its own sets of...
When exactly is it leak safe to use (anonymous) inner classes?
... you are asking is a pretty tough question. While you may think it is just one question, you are actually asking several questions at once. I'll do my best with the knowledge that I have to cover it and, hopefully, some others will join in to cover what I may miss.
Nested Classes: Introduction
As ...
Android ListView with different layouts for each row
...ndViewById() every time in getView method. See List14 in API demos.
Create one generic layout that will conform all combinations of properties and hide some elements if current position doesn't have it.
I hope that will help you. If you could provide some XML stub with your data structure and info...
Understanding implicit in Scala
...B): A will do as well.
So the difference between your methods is that the one marked implicit will be inserted for you by the compiler when a Double is found but an Int is required.
implicit def doubleToInt(d: Double) = d.toInt
val x: Int = 42.0
will work the same as
def doubleToInt(d: Double)...
Return type of '?:' (ternary conditional operator)
...pile time and must be appropriate whether or not the condition is true. If one of the operands must be converted to a different type to match the other then the conditional expression cannot be an lvalue as the result of this conversion would not be an lvalue.
ISO/IEC 14882:2011 references:
3.10 [b...
Accessing items in an collections.OrderedDict by index
...
If you only access one item, you can avoid the memory overhead of list(d.items()) by using next(islice(d.items(), 1)) to get ('bar', 'spam')
– Quantum7
Oct 20 '17 at 15:37
...
How do I return early from a rake task?
I have a rake task where I do some checks at the beginning, if one of the checks fails I would like to return early from the rake task, I don't want to execute any of the remaining code.
...
Command-line svn for Windows?
...corresponding option is not checked.
The svn.exe executable is not standalone and it depends on some other files in the distribution but this should not be a problem in most cases.
Once installed you might need to add the folder containing svn.exe to the system PATH as described here so that it is...