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Check existence of directory and create if doesn't exist
...file.exists(paste(mainDir, subDir, "/", sep = "/", collapse = "/"))) {
cat("subDir exists in mainDir and is a directory")
} else if (file.exists(paste(mainDir, subDir, sep = "/", collapse = "/"))) {
cat("subDir exists in mainDir but is a file")
# you will probably want to handle this sep...
What is the benefit of using $() instead of backticks in shell scripts?
...lt;<<\"$y\"`"
or writing something like:
IPs_inna_string=`awk "/\`cat /etc/myname\`/"'{print $1}' /etc/hosts`
because $() uses an entirely new context for quoting
which is not portable as Bourne and Korn shells would require these backslashes, while Bash and dash don't.
Syntax for nestin...
How to beautify JSON in Python?
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Try underscore-cli:
cat myfile.json | underscore print --color
It's a pretty nifty tool that can elegantly do a lot of manipulation of structured data, execute js snippets, fill templates, etc. It's ridiculously well documented, polished, a...
python setup.py uninstall
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If this does not work, add sudo as follows: cat files.txt | xargs sudo rm -rf
– saroele
Feb 4 '14 at 22:13
22
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Retrieve database or any other file from the Internal Storage using run-as
...un the following command:
adb exec-out run-as debuggable.app.package.name cat databases/file > file
To download multiple files in a folder under the /data/data/debuggable.app.package.name/ at once - use tar:
adb exec-out run-as debuggable.app.package.name tar c databases/ > databases.tar
a...
How do I concatenate two text files in PowerShell?
I am trying to replicate the functionality of the cat command in Unix.
11 Answers
11...
Converting pfx to pem using openssl
How to generate a .pem CA certificate and client certificate from a PFX file using OpenSSL.
3 Answers
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Declaring pointers; asterisk on the left or right of the space between the type and name? [duplicate
...ale, still I'd avoid it. Makes the whole thing look too much like multiplication to me.
– Edwin Buck
Oct 17 '14 at 15:04
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SQL command to display history of queries
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try
cat ~/.mysql_history
this will show you all mysql commands ran on the system
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Best way to parse command-line parameters? [closed]
... improve on (by using a List).
Note also that this approach allows for concatenation of multiple command line arguments - even more than two!
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