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How to use GNU Make on Windows?
I installed MinGW and MSYS, added C:\MinGW\bin to PATH but I still can't run Makefile on Windows' cmd . I would like to run cmd.exe and there type, for example, make all but my cmd says that there is no such command.
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How to select only the first rows for each unique value of a column
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A very simple answer if you say you don't care which address is used.
SELECT
CName, MIN(AddressLine)
FROM
MyTable
GROUP BY
CName
If you want the first according to, say, an "inserted" column then it's a different query
SELECT
M.CName, M.AddressLin...
Send POST Request with Data Specified in File via Curl
... a POST request via Curl from the command line. Data for this request is located in a file. I know that via PUT this could be done with the --upload-file option.
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Android: When is onCreateOptionsMenu called during Activity lifecycle?
...ut one at the beginning of onCreateOptionsMenu . The onCreate method is called first, and before it finishes onCreateOptionsMenu is called.
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How to add /usr/local/bin in $PATH on Mac
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export PATH=$PATH:/usr/local/git/bin:/usr/local/bin
One note: you don't need quotation marks here because it's on the right hand side of an assignment, but in general, and especially on Macs with their tradition of spacy pathnames, expansions like ...
Linux find file names with given string
...d subdirectories whose name contains the string "John". I know that grep can match the content in the files, but I have no idea how to use it with file names. Any help would be appreciated.
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How to store a git config as part of the repository?
...d here .
Now the problem is that filter definition is only stored in my local configuration file:
2 Answers
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Remove duplicated rows using dplyr
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df %>% group_by(x, y) %>% filter(row_number(z) == 1)
## Source: local data frame [3 x 3]
## Groups: x, y
##
## x y z
## 1 0 1 1
## 2 1 0 2
## 3 1 1 4
(In dplyr 0.2 you won't need the dummy z variable and will just be
able to write row_number() == 1)
I've also been thinking about addin...
Eclipse and Windows newlines
... Eclipse and choose File : Convert Line Delimiters to : Unix
Tip: You can easily convert existing file by selecting then in the Package Explorer, and then going to the menu entry File : Convert Line Delimiters to : Unix
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How to forward declare a template class in namespace std?
...Of course, I know that there are more template params for std::list (allocator I think). But, that is beside the point. Do I have to know the full template declaration of a template class to be able to forward declare it?
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