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Change key pair for ec2 instance
...post:
Stop the running EC2 instance
Detach its /dev/xvda1 volume (let's call it volume A) - see here
Start new t1.micro EC2 instance, using my new key pair. Make sure you create it in the same subnet, otherwise you will have to terminate the instance and create it again. - see here
Attach volume A...
How to implement static class member functions in *.cpp file?
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If you define it in the class body, it will automatically be default. If it's in the header outside the class body, it had better be marked either inline or template or you'll get multiple definition errors from the linker.
– Ben Voigt
Ma...
What is the default text size on Android?
...ues are defined within the following TextAppearances:
- TextAppearance.Small
- TextAppearance.Medium
- TextAppearance.Large
More information about Typography can be found in the design guidelines
Related to your question:
If you don't set a custom textSize or textAppearance, TextAppearance.S...
Initialize a nested struct
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@GauravOjha not all the way, but something like play.golang.org/p/n24BD3NlIR
– OneOfOne
Jan 30 '17 at 15:07
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What is a semaphore?
...s bouncers at a nightclub. There are a dedicated number of people that are allowed in the club at once. If the club is full no one is allowed to enter, but as soon as one person leaves another person might enter.
It's simply a way to limit the number of consumers for a specific resource. For exampl...
@RequestBody and @ResponseBody annotations in Spring
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There is a whole Section in the docs called 16.3.3.4 Mapping the request body with the @RequestBody annotation. And one called 16.3.3.5 Mapping the response body with the @ResponseBody annotation. I suggest you consult those sections. Also relevant: @RequestBody ...
Date vs DateTime
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Unfortunately, not in the .Net BCL. Dates are usually represented as a DateTime object with the time set to midnight.
As you can guess, this means that you have all the attendant timezone issues around it, even though for a Date object you'd want absolutely no timezone han...
Eclipse Optimize Imports to Include Static Imports
Is there anyway to get Eclipse to automatically look for static imports? For example, now that I've finally upgraded to Junit 4, I'd like to be able to write:
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Automatic popping up keyboard on start Activity
...ity with a lot of EditText's in them. When I open the activity it automatically focusses to the first EditText and displays the virtual keyboard.
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How to debug Ruby scripts [closed]
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Use Pry (GitHub).
Install via:
$ gem install pry
$ pry
Then add:
require 'pry'; binding.pry
into your program.
As of pry 0.12.2 however, there are no navigation commands such as next, break, etc. Some other gems additionally provide this, s...