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Task not serializable: java.io.NotSerializableException when calling function outside closure only o
...ame problem with class serialization can be of interest to you and you can read on it in this Spark Summit 2013 presentation.
As a side note, you can rewrite rddList.map(someFunc(_)) to rddList.map(someFunc), they are exactly the same. Usually, the second is preferred as it's less verbose and clean...
Possible to make labels appear when hovering over a point in matplotlib?
...nately, with the number of points that I have, the scatter plot would be unreadable if I labeled each point. Does anyone know of a way to create labels that only appear when the cursor hovers in the vicinity of that point?
...
Can you get DB username, pw, database name in Rails?
...n from outside the rails environment:
require 'YAML'
info = YAML::load(IO.read("database.yml"))
print info["production"]["host"]
print info["production"]["database"]
...
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What is a “first chance exception”?
... mentioned in your comments above? Is it a result of self-experimentation? reading books (which one)? That's a very impressive insight! I would appreciate if you could take a moment to answer this please...
– anish
Jun 19 '15 at 12:52
...
Proper use of beginBackgroundTaskWithExpirationHandler
...teger)beginTaskWithCompletionHandler:(CompletionBlock)_completion;
{
//read the counter and increment it
NSUInteger taskKey;
@synchronized(self) {
taskKey = self.taskKeyCounter;
self.taskKeyCounter++;
}
//tell the OS to start a task that should continue in the ...
Can a JSON value contain a multiline string
I am writing a JSON file which would be read by a Java program. The fragment is as follows...
5 Answers
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What does “xmlns” in XML mean?
...k/res/android:foo /> with regards to what it "means" when an XML parser reads the document.
NOTE: You cannot actually use the full namespace URI in place of the namespace prefix in an XML instance document.
Check out this tutorial on namespaces: http://www.sitepoint.com/xml-namespaces-explaine...
Does “display:none” prevent an image from loading?
...e it's not useful.
The image has a display:none style but its size may be read by the script.
Chrome v68.0 does not load images if the parent is hidden.
You may check it there : http://jsfiddle.net/tnk3j08s/
You could also have checked it by looking at the "network" tab of your browser's develop...
Save PL/pgSQL output from PostgreSQL to a CSV file
... You need to check two things:
Which files should the user be allowed to read/write on disk? This might be a particular directory, for instance, and the filename might have to have a suitable prefix or extension.
Which tables should the user be able to read/write in the database? This would normal...
How to change line-ending settings
...
Actually, if you re-read your own question, in the copy/pasted excerpts : "1 ... ("core.autocrlf" is set to "true") ... 2 ... ("core.autocrlf" is set to "input") ... 3 ... ("core.autocrlf" is set to "false")" so you basically answered your own q...