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How do I install an R package from source?
...o try it. However, the first step is to installed a package called RJSONIO from source.
6 Answers
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Making heatmap from pandas DataFrame
I have a dataframe generated from Python's Pandas package. How can I generate heatmap using DataFrame from pandas package.
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Reference: What is variable scope, which variables are accessible from where and what are “undefined
What is "variable scope" in PHP? Are variables from one .php file accessible in another? Why do I sometimes get "undefined variable" errors?
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What is the behavior difference between return-path, reply-to and from?
...an email list, that is going to send out the following RFC2822 content.
From: <coolstuff@mymailinglist.com>
To: <you@yourcompany.com>
Subject: Super simple email
Reply-To: <coolstuff-threadId=123@mymailinglist.com>
This is a very simple body.
Now, let's say you are going to ...
Run function from the command line
...
Alternatively, if you don't care about namespace pollution:
$ python -c 'from foo import *; print hello()'
And the middle ground:
$ python -c 'from foo import hello; print hello()'
share
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imp...
Rails: call another controller action from a controller
I need to call the create action in controller A, from controller B.
9 Answers
9
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jQuery: Return data after ajax call success [duplicate]
...
The only way to return the data from the function would be to make a synchronous call instead of an asynchronous call, but that would freeze up the browser while it's waiting for the response.
You can pass in a callback function that handles the result:
f...
Python Sets vs Lists
...st(iterable):
... for i in iterable:
... pass
...
>>> from timeit import timeit
>>> timeit(
... "iter_test(iterable)",
... setup="from __main__ import iter_test; iterable = set(range(10000))",
... number=100000)
12.666952133178711
>>> timeit(
... ...
Where do “pure virtual function call” crashes come from?
...
They can result if you try to make a virtual function call from a constructor or destructor. Since you can't make a virtual function call from a constructor or destructor (the derived class object hasn't been constructed or has already been destroyed), it calls the base class versio...
Is it possible to define more than one function per file in MATLAB, and access them from outside tha
...hough the scoping behavior is still the same (i.e. they can only be called from within the script).
In addition, you can also declare functions within other functions. These are called nested functions, and these can only be called from within the function they are nested. They can also have access...