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Pandas aggregate count distinct
Let's say I have a log of user activity and I want to generate a report of total duration and the number of unique users per day.
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Is there a way to use two CSS3 box shadows on one element?
I'm trying to replicate a button style in a Photoshop mock-up that has two shadows on it. The first shadow is an inner lighter box shadow (2px), and the second is a drop shadow outside the button (5px) itself.
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Rename an environment with virtualenvwrapper
I have an environment called doors and I would like to rename it to django for the virtualenvwrapper .
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css rotate a pseudo :after or :before content:“”
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is guava-libraries available in maven repo?
...n maven repository. It looks like guava is adding more features to google-collections library.
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IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath
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how do I initialize a float to its max/min value?
How do I hard code an absolute maximum or minimum value for a float or double? I want to search out the max/min of an array by simply iterating through and catching the largest.
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SQL join on multiple columns in same tables
I have 2 subqueries, but I'm having trouble joining columns together from the same tables. I tried:
2 Answers
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Using member variable in lambda capture list inside a member function
The following code compiles with gcc 4.5.1 but not with VS2010 SP1:
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