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Check existence of directory and create if doesn't exist
I often find myself writing R scripts that generate a lot of output. I find it cleaner to put this output into it's own directory(s). What I've written below will check for the existence of a directory and move into it, or create the directory and then move into it. Is there a better way to approach...
How to run Node.js as a background process and never die?
...ize it! Use proper tools for it, like forever, pm2 or the plain old init.d scripts.
– Victor Schröder
Mar 16 '16 at 9:28
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Invoking JavaScript code in an iframe from the parent page
...ally, I have an iframe embedded in a page and the iframe has some JavaScript routines I need to invoke from the parent page.
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Peak memory usage of a linux/unix process
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Here's a one-liner that doesn't require any external scripts or utilities and doesn't require you to start the process via another program like Valgrind or time, so you can use it for any process that's already running:
grep VmPeak /proc/$PID/status
(replace $PID with the PI...
Split code over multiple lines in an R script
I want to split a line in an R script over multiple lines (because it is too long). How do I do that?
5 Answers
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Equivalent of *Nix 'which' command in PowerShell?
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You can put it in your profile script. More on profiles - msdn.microsoft.com/en-us/library/bb613488(VS.85).aspx
– Steven Murawski
Sep 15 '08 at 18:45
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How to shrink/purge ibdata1 file in MySQL
... "query tool" for performing statistics in R, that is, everytime I run a R script, I create a new database (A), create a new table (B), import the data into B, submit a query to get what I need, and then I drop B and drop A.
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What does status=canceled for a resource mean in Chrome Developer Tools?
...e once things get cached, it doesn't happen. If set a breakpoint in my javascript, it doesn't happen. Your first bullet point is probably not the problem because I don't see a element being deleted. I know for a fact it isn't bullet point 3. What do you mean by "Once you touch the contents of an ifr...
How do I remove the old history from a git repository?
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This method is easy to understand and works fine. The argument to the script ($1) is a reference (tag, hash, ...) to the commit starting from which you want to keep your history.
#!/bin/bash
git checkout --orphan temp $1 # create a new branch without parent history
git commit -m "Truncated his...
How to find my Subversion server version number?
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For an HTTP-based server there is a Python script to find the server version at:
http://svn.apache.org/repos/asf/subversion/trunk/tools/client-side/server-version.py
You can get the client version with
`svn --version`
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