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Scala @ operator
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o match {
case Some(x) => println(x)
case None =>
}
But what if you wanted not the content of Some, but the option itself? That would be accomplished with this:
o match {
case x @ Some(_) => println(x)
case None =>
}
Note that @ can be used at any level, not just at the to...
Callback when CSS3 transition finishes
...ore times than you were expecting. I am not aware of any work-around as of now.
– Lev
Dec 16 '13 at 20:25
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Ask for User Permission to Receive UILocalNotifications in iOS 8
I have set up local notifications in the App Delegate Using this:
5 Answers
5
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How do I create a link using javascript?
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@Nadu - Please stop editing my answer. If you want a specific thing to be said, add one of your own; if it's not "different" enough to warrant it, it's not different enough to warrant an edit.
– Jared Farrish
Jan 30 '17 at 17...
What is Rack middleware?
... rackspace. The reason the term 'rack middleware' is confusing, as we all know, is because it was Confucius that wrote all the original rack middleware, more than 2000 years ago. In France.
– LpLrich
Mar 10 '15 at 17:59
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Delete an element from a dictionary
..., and also using linear space. For small dicts, this is not a problem. But if you're planning to make lots of copies of large dicts, you probably want a different data structure, like a HAMT (as described in this answer).
sh...
awk without printing newline
...s printed after every line. You can change it to " " in the BEGIN section if you want everything printed consecutively.
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How do you send a HEAD HTTP request in Python 2?
... of a given URL so I can determine the MIME type. I want to be able to see if http://somedomain/foo/ will return an HTML document or a JPEG image for example. Thus, I need to figure out how to send a HEAD request so that I can read the MIME type without having to download the content. Does anyone ...
Thread-safe List property
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If you are targetting .Net 4 there are a few options in System.Collections.Concurrent Namespace
You could use ConcurrentBag<T> in this case instead of List<T>
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Dictionary returning a default value if the key does not exist [duplicate]
...orms, these extensions work when key doesn't exist, but TryGetValue throws if key is null. Knowing whether key is nullable or not would make this a trivial check.
– ProfK
Sep 27 '12 at 6:12
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