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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...sition).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}
Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %timeit pd.Series(df....
Should I be concerned about excess, non-running, Docker containers?
Every docker run command, or every RUN command inside a Dockerfile, creates a container. If the container is no longer running it can still be seen with docker ps -a .
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When to use f:viewAction / preRenderView versus PostConstruct?
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edited Jun 20 at 9:12
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answered Mar 23 '12 at 18:27
BalusCBalusC
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Running multiple commands in one line in shell
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You are using | (pipe) to direct the output of a command into another command. What you are looking for is && operator to execute the next command only if the previous one succeeded:
cp /templates/apple /templates/used && cp /templates/apple /templates/inus...
How to gracefully handle the SIGKILL signal in Java
...ould handle the signal by doing a controlled, but rapid, shutdown. When a computer shuts down, the final stage of the shutdown process sends every remaining process a SIGTERM, gives those processes a few seconds grace, then sends them a SIGKILL.
The way to handle this for anything other than kill ...
How to get anchor text/href on click using jQuery?
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@rahul: it is becoming funny again, he could give his links any unique name.
– Sarfraz
Apr 16 '10 at 11:15
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How do I use CMake?
I am trying to use CMake in order to compile opencv.
4 Answers
4
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What is Prefix.pch file in Xcode?
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Precompiled header.
What is it?
A Prefix.pch is a precompiled header. Precompiled headers were invented to make compiling faster. Rather than parsing the same header files over and over, these files get parsed once, ahead of tim...
How do I view events fired on an element in Chrome DevTools?
... Chrome will skip it and go straight to your source code. developer.chrome.com/devtools/docs/blackboxing
– Matt Zeunert
Feb 12 '16 at 21:22
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Right way to initialize an OrderedDict using its constructor such that it retains order of initial d
...emoved before the OrderedDict constructor sees it.
Note that using a list comprehension in your last example doesn't change anything. There's no difference between OrderedDict([(i,i) for i in l]) and OrderedDict([('b', 'b'), ('a', 'a'), ('c', 'c'), ('aa', 'aa')]). The list comprehension is evalua...