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Print string and variable contents on the same line in R
... can use paste with print
print(paste0("Current working dir: ", wd))
or cat
cat("Current working dir: ", wd)
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proper way to sudo over ssh
...-t user@server "sudo script"
See man ssh:
-t Force pseudo-tty allocation. This can be used to execute arbi-
trary screen-based programs on a remote machine, which can be
very useful, e.g., when implementing menu services. Multiple -t
options force tty allocation...
Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
...ble (x86)
Registry Key: HKLM\SOFTWARE\Classes\Installer\Products\c1c4f01781cc94c4c8fb1542c0981a2a
Configuration: x86
Version: 6.0.2900.2180
Direct Download URL: https://download.microsoft.com/download/8/B/4/8B42259F-5D70-43F4-AC2E-4B208FD8D66A/vcredist_x86.EXE
Visual C++ 2008
Microsoft Visual...
How to append one file to another in Linux from the shell?
...
Use bash builtin redirection (tldp):
cat file2 >> file1
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Why is it not advisable to have the database and web server on the same machine?
...r web tier would not have access to say, backup the database to a file and ftp that file to ftp.hackers.com using xp_cmdshell. Or drop the database. Or modify config values. etc.
– Mark Brackett
Mar 24 '09 at 14:47
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What's is the difference between train, validation and test set, in neural networks?
...ss the performance [generalization] of a fully specified classifier.
From ftp://ftp.sas.com/pub/neural/FAQ1.txt section "What are the population, sample, training set, design set, validation"
The error surface will be different for different sets of data from your data set (batch learning). Therefo...
Can gcc output C code after preprocessing?
...
Yes. Pass gcc the -E option. This will output preprocessed source code.
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C char array initialization
...kslash is necessary to disambiguate from character '0'.
char buf = 0;
accomplishes the same thing, but the former is a tad less ambiguous to read, I think.
Secondly, you cannot initialize arrays after they have been defined.
char buf[10];
declares and defines the array. The array identifie...
What's the difference between assignment operator and copy constructor?
.... Summarizing:
If a new object has to be created before the copying can occur, the copy constructor is used.
If a new object does not have to be created before the copying can occur, the assignment operator is used.
Example for assignment operator:
Base obj1(5); //calls Base class constructor
B...
Cross-referencing commits in github
...ion of the GitHub help:
User/Project@SHA
For example:
mojombo/god@be6a8cc1c1ecfe9489fb51e4869af15a13fc2cd2
Short SHAs work as well (as long as they are unique):
mojombo/god@be6a8cc
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