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Picking a random element from a set
How do I pick a random element from a set?
I'm particularly interested in picking a random element from a
HashSet or a LinkedHashSet, in Java.
Solutions for other languages are also welcome.
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Return rows in random order [duplicate]
Is it possible to write SQL query that returns table rows in random order every time the query run?
6 Answers
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How do I save a String to a text file using Java?
...u would to any output stream:
out.println(text);
You'll need exception handling, as ever. Be sure to call out.close() when you've finished writing.
If you are using Java 7 or later, you can use the "try-with-resources statement" which will automatically close your PrintStream when you are done w...
How to sort a list/tuple of lists/tuples by the element at a given index?
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@Stephen using itemgetter is faster and simpler: key=itemgetter(1) and at the beginning of the file: from operator import itemgetter
– Joschua
Mar 13 '13 at 20:08
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How to check date of last change in stored procedure or function in SQL server
...crosoft.com/en-us/library/ms190324%28v=sql.105%29.aspx "In SQL Server 2005 and later versions, the visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configu...
Default constructor with empty brackets
...lt;T>(ifs)), std::istream_iterator<T>());
Or, if you have C++11 and list-initialization (also known as uniform initialization) available:
std::vector<T> v{std::istream_iterator<T>{ifs}, std::istream_iterator<T>{}};
With this, there is no way it could be interpreted as...
Best Practice for Forcing Garbage Collection in C#
...need them. If you have custom objects, look at using the "using statement" and the IDisposable interface.
This link has some good practical advice with regards to freeing up memory / garbage collection etc:
http://msdn.microsoft.com/en-us/library/66x5fx1b.aspx
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How to display a Yes/No dialog box on Android?
... difficult (well, at least not programmer-friendly) to display a dialog in Android.
17 Answers
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What is “origin” in Git?
... what URL belongs to each remote by using
git remote -v
In the push command, you can use remotes or you can simply use a URL directly. An example that uses the URL:
git push git@github.com:git/git.git master
share
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Proper use cases for Android UserManager.isUserAGoat()?
I was looking at the new APIs introduced in Android 4.2 .
While looking at the UserManager class I came across the following method:
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