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Find MongoDB records where array field is not empty
...an use this: db.test_collection.find({seen_events: {$gt: ''}}).count(). To confirm it performs well, check out db.test_collection.find({seen_events: {$gt: ''}}).explain(true).executionStats. You can probably enforce that seen events are strings via schema validation: docs.mongodb.com/manual/core/sch...
How to RedirectToAction in ASP.NET MVC without losing request data
...valid data they would receive a "Would you like to resubmit the form data" confirmation. Using the TempData solution as MattMitchell says eliminates this problem.
– user10479
Sep 15 '08 at 23:53
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How do I check if a string contains another string in Swift?
... instance. Also, I can't find the method containsString in the dev docs to confirm if its new for iOS 8.
– Jason Leach
Jun 15 '14 at 3:32
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Behaviour for significant change location API when terminated/suspended?
...a fair bit of testing (mostly on the train between home and work) and have confirmed that the behaviour for suspended apps is as I suspected at the end of the question.
That is, your suspended app is woken up, you don't receive any callbacks on your app delegate, instead you receive your location...
Android Studio installation on Windows 7 fails, no JDK found
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I can confirm that Android Studio works with JDK 1.7 as I have just verified it. And it's probably a good thing to set the system environment variable JDK_HOME (if not JAVA_HOME is set) to point to the installation of the Java JDK....
Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
... First of all, thank you for sharing your implementation. I just wanted to confirm that the algorithm works great for my dataset of 900 vectors in a 700 dimensional space. I was just wondering if it is also possible to evaluate the quality of the clusters generated. Can any of the values in your cod...
onActivityResult() & onResume() [duplicate]
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onActivityResult() is called first (just confirmed this with a few log statements and see that onActivityResult() is indeed called before onResume())
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Inversion of Control vs Dependency Injection
...uppose we are building an application which contains a feature to send SMS confirmation messages once the order has been shipped.
We will have two classes, one is responsible for sending the SMS (SMSService), and another responsible for capturing user inputs (UIHandler), our code will look as below:...
How to add text at the end of each line in Vim?
...sual block mode CTRLV, append to all lines $A a comma ,, then press Esc to confirm.
The documentation is at :h v_b_A. There is even an illustration of how it works in the examples section: :h v_b_A_example.
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How can I make the computer beep in C#?
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It is confirmed that Windows 7 and newer versions (at least 64bit or both) do not use system speaker and instead they route the call to the default sound device.
So, using system.beep() in win7/8/10 will not produce sound using in...