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How to permanently export a variable in Linux?
...lue of your environment variable.
#!/bin/bash
echo "Enter variable name: "
read variable_name
echo "Enter variable value: "
read variable_value
echo "adding " $variable_name " to environment variables: " $variable_value
echo "export "$variable_name"="$variable_value>>~/.bashrc
echo $variable_n...
What does Maven do, in theory and in practice? When is it worth to use it? [closed]
I am about to start a Java project just for practice. I've read about Maven, but I don't actually understand when it is meant to be used.
...
REST vs JSON-RPC? [closed]
...tead, clients depend on message formats. This creates possibility to use already implemented libraries for particular media formats (e.g. Atom, HTML, Collection+JSON, HAL etc...)
It's possible to easily change URIs without breaking clients as far as they only depend on registered (or domain specifi...
How does a Linux/Unix Bash script know its own PID?
...SHPID | cat -
11656 31528
$ echo $$ $BASHPID
11656 11656
$ echo $$ | while read line; do echo $line $$ $BASHPID; done
11656 11656 31497
$ while read line; do echo $line $$ $BASHPID; done <<< $$
11656 11656 11656
sh...
Change R default library path using .libPaths in Rprofile.site fails to work
... if you want to add a library why not append the new library (which must already exist in your filesystem) to the existing library path?
.libPaths( c( .libPaths(), "~/userLibrary") )
Or (and this will make the userLibrary the first place to put new packages):
.libPaths( c( "~/userLibrary" , .li...
Return HTTP status code 201 in flask
...
You can read about it here.
return render_template('page.html'), 201
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How to parse a CSV file using PHP [duplicate]
... I ended up encoding before saving to CSV and decoding while reading - php.net/rawurlencode - that ensures no line-breaks, right? - or does it loose them entirely (can there be line breaks in URL encoding?)
– Julix
May 15 '17 at 4:24
...
Nodejs send file in response
...m that will send myfile.mp3 by streaming it from disk (that is, it doesn't read the whole file into memory before sending the file). The server listens on port 2000.
[Update] As mentioned by @Aftershock in the comments, util.pump is gone and was replaced with a method on the Stream prototype called...
Why compile Python code?
...
The .pyc file is Python that has already been compiled to byte-code. Python automatically runs a .pyc file if it finds one with the same name as a .py file you invoke.
"An Introduction to Python" says this about compiled Python files:
A program doesn't r...
PCH File in Xcode 6
...hy isn't ProjectName-Prefix.pch created automatically in Xcode 6? is worth reading. He points out that a PCH file is probably not a good idea, and suggests explicitly including .h files into modules that need them.
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