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“R cannot be resolved to a variable”? [duplicate]
...s have names that are ok : only lowercase letters, digits and underscore ("_") .
always make sure the targetSdk is pointed to the latest API (currently 18) , and set it in the project.properties file
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How to call Makefile from another Makefile?
...
http://www.gnu.org/software/make/manual/make.html#Recursion
subsystem:
cd subdir && $(MAKE)
or, equivalently, this :
subsystem:
$(MAKE) -C subdir
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How can I install pip on Windows?
...il recently—ironically difficult to install.
Official instructions
Per https://pip.pypa.io/en/stable/installing/#do-i-need-to-install-pip:
Download get-pip.py, being careful to save it as a .py file rather than .txt. Then, run it from the command prompt:
python get-pip.py
You possibly need a...
LINQ To Entities does not recognize the method Last. Really?
...s in general) does not support all the LINQ methods (see here for details: http://msdn.microsoft.com/en-us/library/bb738550.aspx)
What you need here is to order your data in such a way that the "last" record becomes "first" and then you can use FirstOrDefault. Note that databasese usually don't hav...
Generating an Excel file in ASP.NET [closed]
...mlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:html="http://www.w3.org/TR/REC-html40">
<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
<Author>Your_name_here</Author>
<LastAuthor>Your_name_here</LastAuthor>
...
How do I find if a string starts with another string in Ruby?
... with in Ruby, is an important skill to learn.
Have a play with Rubular: http://rubular.com/
But in this case, the following ruby statement will return true if the string on the left starts with 'abc'. The \A in the regex literal on the right means 'the beginning of the string'. Have a play with ...
How to create Windows EventLog source from command line?
...reateEventSource, otherwise it will throw an exception.
For more info:
http://msdn.microsoft.com/en-us/library/9t766zhb.aspx
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How to jump directly to a column number in Vim
...ine.
exclusive motion. Ceci n'est pas une pipe.
http://vimdoc.sourceforge.net/htmldoc/motion.html#bar
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What can I do with a moved-from object?
...ns:
dereference
pop_back
This answer now appears in video format here: http://www.youtube.com/watch?v=vLinb2fgkHk&t=47m10s
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How Big can a Python List Get?
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According to the source code, the maximum size of a list is PY_SSIZE_T_MAX/sizeof(PyObject*).
PY_SSIZE_T_MAX is defined in pyport.h to be ((size_t) -1)>>1
On a regular 32bit system, this is (4294967295 / 2) / 4 or 536870912.
Therefore the maximum size of a python list on a 32 ...