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How do I write a bash script to restart a process if it dies?
...and crashing on your hands. The sleep 1 takes away the strain from that.
Now all you need to do is start this bash script (asynchronously, probably), and it will monitor myserver and restart it as necessary. If you want to start the monitor on boot (making the server "survive" reboots), you can s...
When to use virtual destructors?
...Here, you'll notice that I didn't declare Base's destructor to be virtual. Now, let's have a look at the following snippet:
Base *b = new Derived();
// use b
delete b; // Here's the problem!
Since Base's destructor is not virtual and b is a Base* pointing to a Derived object, delete b has undefin...
Why do I need to explicitly push a new branch?
...same name, creating them if they don't exist),
the default push policy is now 'simple' (push only the current branch, and only if it has a similarly named remote tracking branch on upstream, since git 1.7.11)
In both cases, since the upstream empty repo has no branch:
there is no matching named...
What is an 'endpoint' in Flask?
...y_hello')
def give_greeting(name):
return 'Hello, {0}!'.format(name)
Now, when Flask routes the request, the logic looks like this:
URL (http://www.example.org/greeting/Mark) should be handled by Endpoint "say_hello".
Endpoint "say_hello" should be handled by View Function "give_greeting"
H...
How to properly document S4 class slots using Roxygen2?
... answer for Roxygen2 5.0.1, current as of 6.0.1
For S4, the best practice now is documenting using the @slot tag:
#' The title for my S4 class that extends \code{"character"} class.
#'
#' Some details about this class and my plans for it in the body.
#'
#' @slot myslot1 A logical keeping track of ...
How to convert a DOM node list to an array in Javascript?
...obj[i];
}
return array;
}
UPDATE:
As other answers suggest, you can now can use in modern environments the spread syntax or the Array.from method:
const array = [ ...nodeList ] // or Array.from(nodeList)
But thinking about it, I guess the most common use case to convert a NodeList to an Ar...
What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and
...t about other libraries and how it's usable in common? Also, it seems Avro now has IDL with C-like syntax in addition to JSON one.
– andreypopp
Jan 8 '11 at 12:30
2
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jQuery Validate - require at least one field in a group to be filled
...revalidation problem (other fields in group still marked as invalid). But now I'm experiencing that the form submits even if invalid. If the grouped fields are valid then it does not enter the submithandler and if invalid it enters invalidHandler but submits anyway! I'd say this is a fairly serio...
What is the purpose of Rank2Types?
...f' :: forall r. Num r => (Int -> r) -> Int -> Int -> r, and now we have fixed the g argument so it can take Int but not String. If we enable RankNTypes we can annotate f' with type forall b c r. Num r => (forall a. a -> r) -> b -> c -> r. Can't use it, though—what wou...
SQL query for today's date minus two months
...
If you use MySQL this would become: MyDate < DATE_ADD(NOW(), INTERVAL -2 MONTH)
– Stefan
Feb 27 '14 at 15:51
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