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Create an empty data.frame
... vectors:
df <- data.frame(Date=as.Date(character()),
File=character(),
User=character(),
stringsAsFactors=FALSE)
Here's an other example with different column types :
df <- data.frame(Doubles=double(),
Ints=integer()...
What are namespaces?
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For some reason I thought that if you used namespaces in file1 that you wouldn't have to require or include the file in file2. Unit testing showed that this is not the case.
– Aaron Bell
Apr 13 '19 at 16:51
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Xcode 6 iPhone Simulator Application Support location
...folder in Application Support for the iOS 8 iPhone Simulator. Where are my files and Core Data sqlite database being stored?
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What is a simple command line program or script to backup SQL server databases?
... a single database from the command line, use osql or sqlcmd.
"C:\Program Files\Microsoft SQL Server\90\Tools\Binn\osql.exe"
-E -Q "BACKUP DATABASE mydatabase TO DISK='C:\tmp\db.bak' WITH FORMAT"
You'll also want to read the documentation on BACKUP and RESTORE and general procedures.
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Disable spell checking on IntelliJ IDEA
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Follow :
File >> Settings >> Editor >> Inspections >> Spelling >> Typo
-> Uncheck the options that you want to disable.
Source for more details - Spellchecking with intelliJ
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New to MongoDB Can not run command mongo
... or better to define it as a configuration value within your configuration file then use it as mongod -f C:\path\to\your\mongodb.conf.
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Get parts of a NSURL in objective-c
...L would look like this:
http://foobar:nicate@example.com:8080/some/path/file.html;params-here?foo=bar#baz
NSURL has a wide range of accessors. You may check them in the documentation for the NSURL class, section Accessing the Parts of the URL. For quick reference:
-[NSURL scheme] = http
-[NSU...
How do I configure PyCharm to run py.test tests?
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Please go to File | Settings | Tools | Python Integrated Tools and change the default test runner to py.test. Then you'll get the py.test option to create tests instead of the unittest one.
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Configure apache to listen on port other than 80
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Open httpd.conf file in your text editor.
Find this line:
Listen 80
and change it
Listen 8079
After change, save it and restart apache.
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What does 'foo' really mean?
... generally as a sample name for absolutely anything, esp.
programs and files (esp. scratch files).
First on the standard list of metasyntactic variables used in
syntax examples (bar, baz, qux, quux, corge, grault, garply,
waldo, fred, plugh, xyzzy, thud). [JARGON]
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