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What does map(&:name) mean in Ruby?
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It's shorthand for tags.map(&:name.to_proc).join(' ')
If foo is an object with a to_proc method, then you can pass it to a method as &foo, which will call foo.to_proc and use that as the method's block.
The Symbol#to_proc method was originally added by A...
How do I copy folder with files to another folder in Unix/Linux? [closed]
I am having some issues to copy a folder with files in that folder into another folder. Command cp -r doesn't copy files in the folder.
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Refused to display in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'
I am developing a website that is supposed to be responsive so that people can access it from their phones. The site has got some secured parts that can be logged into using Google, Facebook, ...etc (OAuth).
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How do I query if a database schema exists
...art of our build process we run a database update script as we deploy code to 4 different environments. Further, since the same query will get added to until we drop a release into production it has to be able to run multiple times on a given database. Like this:
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Automatically create an Enum based on values in a database lookup table?
How do I automatically create an enum and subsequently use its values in C# based on values in a database lookup table (using enterprise library data layer)?
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Can you make valid Makefiles without tab characters?
On my system (Mac OS X), make seems to require that that Makefiles have a tab character preceding the the content of each command line, or it throws a syntax error.
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Any shortcut to initialize all array elements to zero?
In C/C++ I used to do
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install / uninstall APKs programmatically (PackageManager vs Intents)
My application installs other applications, and it needs to keep track of what applications it has installed. Of course, this could be achieved by simply keeping a list of installed applications. But this should not be necessary! It should be the responsibility of the PackageManager to maintain the ...
Git format-patch to be svn compatible?
Is there any way to get a patch created with git format-patch to be svn compatible so that I can submit it to an svn repo?
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Python serialization - Why pickle?
I understood that Python pickling is a way to 'store' a Python Object in a way that does respect Object programming - different from an output written in txt file or DB.
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