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Delete all but the most recent X files in bash
...the explanation for why it's generally not a good idea to parse ls output: http://mywiki.wooledge.org/ParsingLs
ls -tp | grep -v '/$' | tail -n +6 | xargs -I {} rm -- {}
The above is inefficient, because xargs has to invoke rm once for each filename.
Your platform's xargs may allow you to solve t...
Why is Lisp used for AI? [closed]
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Lisp WAS used in AI until the end of the 1980s. In the 80s, though, Common Lisp was oversold to the business world as the "AI language"; the backlash forced most AI programmers to C++ for a few years. These days, prototypes usually are written in a younger dynamic language (Perl, Python, Ruby...
How can I parse a YAML file in Python
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I like the article by moose: martin-thoma.com/configuration-files-in-python
– SaurabhM
Aug 19 '15 at 2:28
4
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Custom CSS Scrollbar for Firefox
...tomization available in Firefox!
See these answers:
https://stackoverflow.com/a/54101063/405015
https://stackoverflow.com/a/53739309/405015
And this for background info: https://bugzilla.mozilla.org/show_bug.cgi?id=1460109
There's no Firefox equivalent to ::-webkit-scrollbar and friends.
You'll h...
How to install Java 8 on Mac
... cask install java
For the many use cases depending on an older version (commonly Java 8), the AdoptOpenJDK project makes it possible with an extra step.
brew tap adoptopenjdk/openjdk
brew cask install adoptopenjdk8
Existing users of Homebrew may encounter Error: Cask adoptopenjdk8 exists in mu...
Linking R and Julia?
Julia looks very promising for fast and syntax-sane computation (e.g. here ), but I suspect it will not be anywhere near R in terms of overall statistics workflow for some time yet. So I'd like to use it where C++ is mainly used in R programs: to optimize slow portions of code. Before I invest th...
Find text string using jQuery?
...tains any matched element. See the API information at: https://api.jquery.com/contains-selector/
One thing to note with the '*' wildcard is that you'll get all elements, including your html an body elements, which you probably don't want. That's why most of the examples at jQuery and other places...
Can I find out the return value before returning while debugging in Visual Studio?
... I know of. Note that if you do add a variable, it will get removed by the compiler in release builds anyway...
Update:
This functionality has been added to VS2013.
You can see the return values in the autos windows or use $ReturnValue in the watch/immediate window.
The value can only be seen dire...
How to extract the file name from URI returned from Intent.ACTION_GET_CONTENT?
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developer.android.com has nice example code for this:
https://developer.android.com/guide/topics/providers/document-provider.html
A condensed version to just extract the file name (assuming "this" is an Activity):
public String getFileName(U...
How to get a number of random elements from an array?
...d suggest using Python's implementation if you are going for speed: jsperf.com/pick-random-elements-from-an-array
– Derek 朕會功夫
Aug 7 '17 at 23:29
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