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How to find all duplicate from a List? [duplicate]

... In .NET framework 3.5 and above you can use Enumerable.GroupBy which returns an enumerable of enumerables of duplicate keys, and then filter out any of the enumerables that have a Count of <=1, then select their keys to get back down to a singl...
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SQL Inner-join with 3 tables?

...preferences? (one column for each preference) – Bob Sanders Apr 17 '12 at 17:05 1 @BobSanders jus...
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The request was aborted: Could not create SSL/TLS secure channel

...12; // Use SecurityProtocolType.Ssl3 if needed for compatibility reasons And now, it works perfectly. ADDENDUM As mentioned by Robin French; if you are getting this problem while configuring PayPal, please note that they won't support SSL3 starting by December, 3rd 2018. You'll need to use TLS...
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How do I sort a list by different parameters at different timed

...ms. I like the elegant combination you do with the enums, the "descending" and the "Composite". I guess the null values treatment is missing, but it's easy to add the same way as "descending". – KLE Sep 15 '09 at 7:48 ...
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Moving UITabBarItem Image down?

Normally on each tab of a UITabBar you have a small image and a title naming the tab. The image is positioned/centred towards the top of the tab to accommodate the title underneath. My question is: if you want to have a tabBar with just an image and no title is there a way to move the image down ...
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android start activity from service

Android: 7 Answers 7 ...
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Customizing Bootstrap CSS template

I am just getting started with Bootstrap from Twitter and am wondering what the ‘best practices’ is for customization. I want to develop a system that will take advantage of all the power of a css template (Bootstrap or other), be completely (and easily) modifiable, be sustainable (ie – when t...
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Define a lambda expression that raises an Exception

...ption without defining a named function. All you need is a strong stomach (and 2.x for the given code): type(lambda:0)(type((lambda:0).func_code)( 1,1,1,67,'|\0\0\202\1\0',(),(),('x',),'','',1,''),{} )(Exception()) And a python3 strong stomach solution: type(lambda: 0)(type((lambda: 0).__code_...
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How to enable zoom controls and pinch zoom in a WebView?

The default Browser app for Android shows zoom controls when you're scrolling and also allows for pinch zooming. How can I enable this feature for my own Webview? ...
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Why is String immutable in Java?

...it were mutable, these parameters could be easily changed. Synchronization and concurrency: making String immutable automatically makes them thread safe thereby solving the synchronization issues. Caching: when compiler optimizes your String objects, it sees that if two objects have same value (a="...