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Filter dataframe rows if value in column is in a set list of values [duplicate]
I have a Python pandas DataFrame rpt :
7 Answers
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What is the purpose of a plus symbol before a variable?
...icating the if on whether or not d is a non-zero number.
Reference here. And, as pointed out in comments, here.
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What is the purpose of the '@' symbol in CSS?
I just stumbled across this question and I noticed the user is using some notation I've never seen before:
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Synchronous request in Node.js
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Please try IcedCoffeScript to which provides await and defer for nodejs.
– Thanigainathan
Jul 25 '14 at 22:21
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C# Thread safe fast(est) counter
...ment will have better performance than lock(). Just take a look at the IL and Assembly where you will see that Increment turns into a "bus lock" statement and its variable is directly incremented (x86) or "added" to (x64).
This "bus lock" statement locks the bus to prevent another CPU from acces...
How to create a video from images with FFmpeg?
... constant frame rate. See Create a video slideshow from images – FFmpeg, and this What is the (technical) difference between -r and the fps filter?. So using -r parameter sometimes couse skipping first image..
– khan
Nov 6 '14 at 17:55
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Throwing cats out of windows
...y write a little DP (dynamic programming) for the general case of n floors and m cats.
The main formula, a[n][m] = min(max(a[k - 1][m - 1], a[n - k][m]) + 1) : for each k in 1..n, should be self-explanatory:
If first cat is thrown from k-th floor and dies, we now have k - 1 floors to check (all...
How to add elements of a Java8 stream into an existing List
... to add to an existing collection using forEachOrdered(). This is a useful and effective technique for mutating existing collections. My answer addresses why you shouldn't use a Collector to mutate an existing collection.
The short answer is no, at least, not in general, you shouldn't use a Collect...
doGet and doPost in Servlets
...information to a Servlet. In the Servlet, I am using the methods doGet() and doPost() :
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Is there a way to override class variables in Java?
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@siddagrl: can you elaborate ?
– Mr_and_Mrs_D
Oct 30 '13 at 12:27
which of OP's classes is Person sup...