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Which is more preferable to use: lambda functions or nested functions ('def')?
...))))[-10:]
I wrote it, and it took me a minute to figure it out. This is from Project Euler - i won't say which problem because i hate spoilers, but it runs in 0.124 seconds :)
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How to check if a file exists in Go?
... whether or not the paths already exist. (Also you need to check the error from that call.)
Instead of using os.Create, you should use os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0666) . That way you'll get an error if the file already exists. Also this doesn't have a race condition with s...
Collection versus List what should you use on your interfaces?
...mbiguity. Collection<T> and ReadOnlyCollection<T> both derive from ICollection<T> (i.e. there is no IReadOnlyCollection<T>). If you return the interface, it's not obvious which one it is and whether it can be modified. Anyway, thanks for your input. This was a good sanity...
How do I byte-compile everything in my .emacs.d directory?
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You can use the --batch flag to recompile from the command line.
To recompile all, do
emacs --batch --eval '(byte-recompile-directory "~/.emacs.d")'
or to recompile a single file as from a Makefile,
emacs --batch --eval '(byte-compile-file "your-elisp-file.el")'...
Java time-based map/cache with expiring keys [closed]
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As from v10, you should be using CacheBuilder instead (guava-libraries.googlecode.com/svn/trunk/javadoc/com/google/…) since expiration etc have been deprecated in MapMaker
– wwadge
Sep 14...
How to check whether a string is Base64 encoded or not
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from the documentation: isArrayByteBase64(byte[] arrayOctet) Deprecated. 1.5 Use isBase64(byte[]), will be removed in 2.0.
– Avinash R
Dec 5 '13 at 4:32
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What is the difference between CHARACTER VARYING and VARCHAR in PostgreSQL?
... difference.
The long answer: CHARACTER VARYING is the official type name from the ANSI SQL standard, which all compliant databases are required to support. VARCHAR is a shorter alias which all modern databases also support. I prefer VARCHAR because it's shorter and because the longer name feels pe...
What is Compass, what is sass…how do they differ?
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From Sass and Compass in Action, by Wynn Netherland, Nathan Weizenbaum, Chris Eppstein, and Brandon Mathis:
1.3 What is Compass?
Compass helps Sass authors write smarter stylesheets and empowers a community
of designers and ...
font-style: italic vs oblique in CSS
...lated version of an italic font, created by slanting the normal version.
From here, we deduce that if an italic version of the font is not available, both italic and oblique behave the same way. Since the W3Schools code snippet does not specify any particular font-family, I believe a default font...
How to save an HTML5 Canvas as an image on a server?
...art project where I would like to allow users to save the resulting images from an algorithm. The general idea is:
8 Answer...