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Java: Detect duplicates in ArrayList?
...ole collection into a Set (using the Set(Collection) constructor or Set.addAll), then see if the Set has the same size as the ArrayList.
List<Integer> list = ...;
Set<Integer> set = new HashSet<Integer>(list);
if(set.size() < list.size()){
/* There are duplicates */
}
Up...
Java Interfaces/Implementation naming convention [duplicate]
...tation tautology that adds nothing but more stuff to type to your code.
All modern Java IDE's mark Interfaces and Implementations and what not without this silly notation. Don't call it TruckClass that is tautology just as bad as the IInterface tautology.
If it is an implementation it is a cla...
How do I remove packages installed with Python's easy_install?
Python's easy_install makes installing new packages extremely convenient. However, as far as I can tell, it doesn't implement the other common features of a dependency manager - listing and removing installed packages.
...
Using sphinx with Markdown instead of RST
...on to choose the parser.) The beauty of this would be instant support for all docutils output formats (but you might not care about that, as similar markdown tools already exist for most). Ways to approach that without developing a parser from scratch:
You could cheat and write a "parser" that us...
How to delete all datastore in Google App Engine?
Does anyone know how to delete all datastore in Google App Engine ?
28 Answers
28
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shortcut for creating a Map from a List in groovy?
...
Check out "inject". Real functional programming wonks call it "fold".
columns.inject([:]) { memo, entry ->
memo[entry.name] = entry.val
return memo
}
And, while you're at it, you probably want to define methods as Categories instead of right on the metaClass. That ...
Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
...ry variance in your estimates. If you have 100,000 instances, it doesn't really matter whether you choose an 80:20 split or a 90:10 split (indeed you may choose to use less training data if your method is particularly computationally intensive).
Assuming you have enough data to do proper held-out t...
Disable scrolling in webview?
...mething I haven't been able to figure out on Android is how to programmatically prevent scrolling in a WebView ?
14 Answer...
The type or namespace name could not be found [duplicate]
...ith several projects in Visual Studio 2010 .
One is a test project (I'll call it " PrjTest "), the other is a Windows Forms Application project (I'll call it " PrjForm "). There is also a third project referenced by PrjForm, which it is able to reference and use successfully.
...
Full examples of using pySerial package [closed]
...is code. I'm not certain on this but I believe the serial port is automatically opened when it is explicitly defined as you have done with ser. After commenting out the ser.open() line it worked.
– user3817250
Sep 23 '14 at 14:31
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