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Pandas count(distinct) equivalent

... as two column YEARMONTH and count. Also can i set the count in descending order? – Murtaza Haji Apr 30 at 1:22 add a comment  |  ...
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What is the meaning of prepended double colon “::”?

... Noteworthy differences: 1) shells tend to use the first match using the ordering in PATH, whereas C++ gives a compiler error when you've been ambiguous. 2) In C++, names without any leading scope can be matched in the current namespace, while most UNIX shells only do that if you put . in the PAT...
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how to calculate binary search complexity

...f size n will not exceed log n. This is just formal mathematical lingo in order to be able to prove statements, etc. It has a very straightforward explanation. When n grows very large, the log n function will out-grow the time it takes to execute the function. The size of the "input set", n, is jus...
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How do you get the magnitude of a vector in Numpy?

...4,5]) np.linalg.norm(x) You can also feed in an optional ord for the nth order norm you want. Say you wanted the 1-norm: np.linalg.norm(x,ord=1) And so on. share | improve this answer ...
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How to create and use resources in .NET

... Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity. ...
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Create and append dynamically

...end to it. iDiv.appendChild(innerDiv); http://jsfiddle.net/W4Sup/1/ The order of event creation doesn't have to be as I have it above. You can alternately append the new innerDiv to the outer div before you add both to the <body>. var iDiv = document.createElement('div'); iDiv.id = 'block'...
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Gson: How to exclude specific fields from Serialization without annotations

...ted runtime dynamic exclusion. I some cases I want some fields excluded in order to provide a lighter/restricted response and in others I want the full object serialized – Liviu T. May 7 '11 at 7:36 ...
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Java Reflection Performance

... reflection throughout a million line system only to later discover it was orders of magnitude too slow. – RichieHH Aug 15 '10 at 14:51 2 ...
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How to take all but the last element in a sequence using LINQ?

... As an alternative to creating your own method and in a case the elements order is not important, the next will work: var result = sequence.Reverse().Skip(1); share | improve this answer ...
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warning: implicit declaration of function

...clude "SSD1306_LCD.h" Exactly the same #include list, just different order. Well, it did for me. share | improve this answer | follow | ...