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How to pattern match using regular expression in Scala?
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edited Aug 10 '15 at 16:11
r0estir0bbe
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ans...
How do you delete a column by name in data.table?
...ere so you know the option exists in case you really do need it:
# Method 5a (like Method 3)
df3[, !"foo", with=FALSE]
# Method 5b (like Method 4)
df3[, !grep("^foo$", names(df3)), with=FALSE]
# Method 5b (another like Method 4)
df3[, !grepl("^foo$", names(df3)), with=FALSE]
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MySQL error code: 1175 during UPDATE in MySQL Workbench
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edited Mar 25 '15 at 19:10
juanes
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answered Jul 12 '12 a...
Singular or plural controller and helper names in Rails
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158
Definitely plural.
With restful routing and a singular controller
Controller:
dog_controller...
How to have the cp command create any necessary folders for copying a file to a destination [duplica
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lhunathlhunath
95.9k1414 gold badges6060 silver badges7474 bronze badges
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Quickly create a large file on a Linux system
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526
dd from the other answers is a good solution, but it is slow for this purpose. In Linux (and o...
How do I remove blank elements from an array?
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511
There are many ways to do this, one is reject
noEmptyCities = cities.reject { |c| c.empty? }
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Modify SVG fill color when being served as Background-Image
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edited Dec 21 '18 at 0:15
David Neto
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answered Nov...
End of support for python 2.7?
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As of 13 Apr 2014, from http://hg.python.org/peps/rev/76d43e52d978 (PEP 373, Python 2.7 Release Schedule):
The End Of Life date (EOL, sunset date) for Python 2.7 has been moved
five years into the future, to 2020. This decision was made to
clarify the status of Python 2.7 and...