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Bash script processing limited number of commands in parallel
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For example, if you have the list of links in a file, you can do cat list_of_links.txt | parallel -j 4 wget {} which will keep four wgets running at a time.
– Mr. Llama
Aug 13 '15 at 19:30
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Install specific git commit with pip
...sible to automatically install a python package using the requirements.txt file on you project just by adding the following line:
-e git+https://github.com/owner/repository.git@branch_or_commit
and run the command line:
$ pip install -r requirements.txt
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Process escape sequences in a string in Python
Sometimes when I get input from a file or the user, I get a string with escape sequences in it. I would like to process the escape sequences in the same way that Python processes escape sequences in string literals .
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How does lombok work?
...ation Processing API available in Java 6.
Note that lombok.jar contains a file named /META-INF/services/javax.annotation.processing.Processor. When javac sees this file in a compilation classpath, it runs annotation processors defined there during compilation.
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Bash if [ false ] ; returns true
...der your control (or which can be manipulated externally, be it by unusual filenames or otherwise), if $predicate can easily be abused to execute hostile code in a manner that if [[ $predicate ]] cannot.
– Charles Duffy
Feb 18 '17 at 5:25
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How can I prevent Visual Studio 2013 from closing my IIS Express app when I end debugging?
...nd Continue is useful when debugging and testing web projects. That *.aspx files can be edited, the browser refreshed, and changes will appear. It's not so useful for non-web code...
– Zarepheth
Jul 9 '15 at 21:11
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How to assign colors to categorical variables in ggplot2 that have stable mapping?
...iple data frames can become tedious if they are being pulled from separate files and not all factor levels appear in each file.
One way to address this is to create a custom manual colour scale as follows:
#Some test data
dat <- data.frame(x=runif(10),y=runif(10),
grp = rep(LETTERS[1:5]...
data.table vs dplyr: can one do something well the other can't or does poorly?
...st of the features here and also in this post. In addition:
fread - fast file reader has been available for a long time now.
fwrite - a parallelised fast file writer is now available. See this post for a detailed explanation on the implementation and #1664 for keeping track of further developments...
What happens when a computer program runs?
...ually used in POSIX binaries. POSIX boxes (almost universally) use the ELF file format. In this format, the operating system is responsible for communications between libraries in different ELF files. Therefore, all the libraries use position-independent code (That is, the code itself can be loaded ...
Landscape printing from HTML
...le the size is omitted.
The support is very mixed with a bug report begin filed in firefox, most browsers do not support it.
It may seem to work in IE7 but this is because IE7 will remember the users last selection of landscape or portrait in print preview (only the browser is re-started).
This ...