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Quickly reading very large tables as dataframes
...csv",sep=",",row.names=FALSE,quote=FALSE)
cat("File size (MB):",round(file.info("test.csv")$size/1024^2),"\n")
## File size (MB): 51
system.time(DF1 <- read.csv("test.csv",stringsAsFactors=FALSE))
## user system elapsed
## 24.71 0.15 25.42
# second run will be faster
sys...
Get list of passed arguments in Windows batch script (.bat)
...ully qualified path name of the script (d:\scripts\some-batch.bat)
More info examples at https://www.ss64.com/nt/syntax-args.html and https://www.robvanderwoude.com/parameters.html
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How do I save a String to a text file using Java?
...a.txt";
Files.write( Paths.get(path), content.getBytes());
There is more info here:
http://www.drdobbs.com/jvm/java-se-7-new-file-io/231600403
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How can I generate a self-signed certificate with SubjectAltName using OpenSSL? [closed]
... -sha256 -out certificate.pem -days 730
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
...
Finally, examine the certificate:
$ openssl x509 -in certificate.pem -tex...
What's the difference between Cache-Control: max-age=0 and no-cache?
...
I had this same question, and found some info in my searches (your question came up as one of the results). Here's what I determined...
There are two sides to the Cache-Control header. One side is where it can be sent by the web server (aka. "origin server"). Th...
Is there a __CLASS__ macro in C++?
...owever, this will only work with gcc.
Here's an example of extracting the information through a macro style interface.
inline std::string methodName(const std::string& prettyFunction)
{
size_t colons = prettyFunction.find("::");
size_t begin = prettyFunction.substr(0,colons).rfind(" "...
SQL Server Linked Server Example Query
...2013/05/top-3-performance-killers-for-linked-server-queries/ for some more info.
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Why does the indexing start with zero in 'C'?
...ay refers (0 elements away), so it should be denoted as array[0].
For more info:
http://developeronline.blogspot.com/2008/04/why-array-index-should-start-from-0.html
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Aliases in Windows command prompt
...to open the current directory. See this help entry from Jetbrains for more info and this for other command line options for phpstorm.
– geisterfurz007
Jun 17 at 6:51
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How to make the python interpreter correctly handle non-ASCII characters in string operations?
... out how to get the strings from the html or xml document in unicode. More info on that here: diveintopython.org/xml_processing/unicode.html
– Isaiah
Aug 27 '09 at 16:38
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