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Why JSF saves the state of UI components on server?
...the state of UI components on the server side ?
Because HTTP is stateless and JSF is stateful. The JSF component tree is subject to dynamic (programmatic) changes. JSF simply needs to know the exact state as it was when the form had been displayed to the enduser, so that it can successfully process...
Is it possible to start a shell session in a running container (without ssh)
I was naively expecting this command to run a bash shell in a running container :
15 Answers
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Formatting floats without trailing zeros
...t formatting rather than scientific notation, etc etc. Yeah, not as slick and elegant as %g, but, it works (and I don't know how to force %g to never use scientific notation;-).
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How to use a dot “.” to access members of dictionary?
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Recommend adding getstate and setstate so that deep copy and other systems can support it.
– user1363990
Sep 27 '17 at 3:01
4
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How to create a WPF Window without a border that can be resized via a grip only?
...indow (even without setting any transparency values) the border disappears and you can only resize via the grip.
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="640" Height="480"
WindowStyle=...
What is a servicebus and when do I need one?
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You can think of a service bus as the Ethernet of SOA.
First and foremost, it introduces a language of identifying things, like an IP address in Ethernet. This name isn't something inherently physical.
Next, you have something physical involved on each node, like a queue in the case o...
Can comments be used in JSON?
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No.
The JSON should all be data, and if you include a comment, then it will be data too.
You could have a designated data element called "_comment" (or something) that would be ignored by apps that use the JSON data.
You would probably be better having the...
Difference between validate(), revalidate() and invalidate() in Swing GUI
...idate() marks the container as invalid. Means the content is somehow wrong and must be re-laid out. But it's just a kind of mark/flag. It's possible that multiple invalid containers must be refreshed later.
validate() performs relayout. It means invalid content is asked for all the sizes and all th...
async/await - when to return a Task vs void?
... are special in another aspect: they represent top-level async operations, and have additional rules that come into play when your task returns an exception. The easiest way is to show the difference is with an example:
static async void f()
{
await h();
}
static async Task g()
{
await h()...
How to run a shell script at startup
On an Amazon S3 Linux instance, I have two scripts called start_my_app and stop_my_app which start and stop forever (which in turn runs my Node.js application). I use these scripts to manually start and stop my Node.js application. So far so good.
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