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Summarizing multiple columns with dplyr? [duplicate]
...be great: summarize(df, a:c, d=paste(d, collaspe =',' ) . Just want to put more original columns in for reference
– biocyberman
Aug 8 '15 at 17:28
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Is there a command line utility for rendering GitHub flavored Markdown?
...f date. Flask does support 3.3, see flask.pocoo.org/docs/python3. Here's a more recent Github thread on the topic github.com/mitsuhiko/flask/issues/587. If there's another dependency that needs updated, feel free to open an issue or a pull request.
– Joe
Aug 28...
Entity Framework 6 Code first Default value
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How to import other Python files?
...rgument for relative imports.
Update: Answer below is outdated. Use the more recent alternative above.
Just import file without the '.py' extension.
You can mark a folder as a package, by adding an empty file named __init__.py.
You can use the __import__ function. It takes the module name as a ...
Throwing exceptions from constructors
...y of doing this. Read this FAQ about Handling a constructor that fails for more information. Having a init() method will also work, but everybody who creates the object of mutex has to remember that init() has to be called. I feel it goes against the RAII principle.
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Regex to get string between curly braces
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How can you diff two pipelines in Bash?
...az | quux) # or only use process substitution once
The 2nd version will more clearly remind you which input was which, by showing
-- /dev/stdin vs. ++ /dev/fd/63 or something, instead of two numbered fds.
Not even a named pipe will appear in the filesystem, at least on OSes where bash can impl...
Test if a string contains any of the strings from an array
...t of the time this will actually hinder performance. See this question for more details on parallel streaming.
Original slightly dated answer:
Here is a (VERY BASIC) static method. Note that it is case sensitive on the comparison strings. A primitive way to make it case insensitive would be to call...
When do you use the Bridge Pattern? How is it different from Adapter pattern?
...e to another. However, the intent of the Adapter pattern is to make one or more classes' interfaces look the same as that of a particular class. The Bridge pattern is designed to separate a class's interface from its implementation so you can vary or replace the implementation without changing the c...