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mongodb count num of distinct values per field/key
Is there a query for calculating how many distinct values a field contains in DB.
5 Answers
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How do you execute an arbitrary native command from a string?
I can express my need with the following scenario: Write a function that accepts a string to be run as a native command.
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Maven check for updated dependencies in repository
Is there a Maven plugin that allows you to check if there are newer versions of dependencies available in the repository?
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How to deserialize a list using GSON or another JSON library in Java?
I can serialize a List<Video> in my servlet on GAE, but I can't deserialize it. What am I doing wrong?
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How to set RelativeLayout layout params in code not in xml?
For example I want to add 3 buttons on screen: one align left, one align center, last one align right.
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How to pass an array into jQuery .data() attribute
Ok so I want to pass a very basic array into a jquery data attrubute server side like so:
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setNeedsLayout vs. setNeedsUpdateConstraints and layoutIfNeeded vs updateConstraintsIfNeeded
I know that the auto layout chain consists in basically 3 different process.
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MIME type warning in chrome for png images
Just ran my site in chrome and suprisingly it comes up with this warning for each of my .png images:
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Java `final` method: what does it promise?
In a Java class a method can be defined to be final , to mark that this method may not be overridden:
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How to subtract a day from a date?
I have a Python datetime.datetime object. What is the best way to subtract one day?
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