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Node.js create folder or use existing

... Good way to do this is to use mkdirp module. $ npm install mkdirp Use it to run function that requires the directory. Callback is called after path is created or if path did already exists. Error err is set if mkdirp failed to create directory path. var mkdirp = require('mkdir...
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Recursively list all files in a directory including files in symlink directories

... directories /dir/dir11 , /dir/dir12 , and /dir/dir13 . I want to list all the files in dir including the ones in dir11 , dir12 and dir13 . ...
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What's the syntax for mod in java

As an example in pseudocode: 17 Answers 17 ...
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Why does Python print unicode characters when the default encoding is ASCII?

...ng the encoding scheme currently stored in sys.stdout.encoding. Python actually picks up this setting from the environment it's been initiated from. If it can't find a proper encoding from the environment, only then does it revert to its default, ASCII. For example, I use a bash shell which encodin...
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In C#, What is a monad?

... Most of what you do in programming all day is combining some functions together to build bigger functions from them. Usually you have not only functions in your toolbox but also other things like operators, variable assignments and the like, but generally your...
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Why are side-effects modeled as monads in Haskell?

... Suppose a function has side effects. If we take all the effects it produces as the input and output parameters, then the function is pure to the outside world. So, for an impure function f' :: Int -> Int we add the RealWorld to the consideration f :: Int -> RealWorl...
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e.printStackTrace equivalent in python

... import traceback traceback.print_exc() When doing this inside an except ...: block it will automatically use the current exception. See http://docs.python.org/library/traceback.html for more information. ...
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What are the differences between Autotools, Cmake and Scons?

... In truth, Autotools' only real 'saving grace' is that it is what all the GNU projects are largely using. Issues with Autotools: Truly ARCANE m4 macro syntax combined with verbose, twisted shell scripting for tests for "compatibility", etc. If you're not paying attention, you will mess u...
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Quickly reading very large tables as dataframes

... MonetDB.R gives you a data type that pretends to be a data frame but is really a MonetDB underneath, increasing performance. Import data with its monetdb.read.csv function. dplyr allows you to work directly with data stored in several types of database. Storing data in binary formats can also be...
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How do I write a bash script to restart a process if it dies?

...crashing on your hands. The sleep 1 takes away the strain from that. Now all you need to do is start this bash script (asynchronously, probably), and it will monitor myserver and restart it as necessary. If you want to start the monitor on boot (making the server "survive" reboots), you can sched...