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Should import statements always be at the top of a module?
...ts at the top of the module is fine, because it's a trivial cost that's only paid once.
Putting the imports within a function will cause calls to that function to take longer.
So if you care about efficiency, put the imports at the top. Only move them into a function if your profiling shows that w...
Opposite of %in%: exclude rows with values specified in a vector
A categorical variable V1 in a data frame D1 can have values represented by the letters from A to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
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What are forward declarations in C++?
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Why forward-declare is necessary in C++
The compiler wants to ensure you haven't made spelling mistakes or passed the wrong number of arguments to the function. So, it insists that it first sees a declaration of 'add' (or any ...
Passing arguments to an interactive program non-interactively
I have a bash script that employs the read command to read arguments to commands interactively, for example yes/no options. Is there a way to call this script in a non-interactive script passing default option values as arguments?
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Moving average or running mean
Is there a SciPy function or NumPy function or module for Python that calculates the running mean of a 1D array given a specific window?
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How to draw an empty plot?
I need to make an empty plot. This is the best could I come up with.
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Fastest Way to Find Distance Between Two Lat/Long Points
I currently have just under a million locations in a mysql database all with longitude and latitude information.
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Coffeescript — How to create a self-initiating anonymous function?
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While you can just use parentheses (e.g. (-> foo)(), you can avoid them by using the do keyword:
do f = -> console.log 'this runs right away'
The most common use of do is capturing variables in a loop. For instance,
for x...
Update parent scope variable in AngularJS
...the child scope inherits properties from the parent scope but is there a way to update the parent scope variable? So far I have not come across any obvious solutions.
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How to sum all the values in a dictionary?
Let's say I have a dictionary in which the keys map to integers like:
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