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How do I run a rake task from Capistrano?

...ilding a generic version of Mirek Rusin's answer: desc 'Invoke a rake command on the remote server' task :invoke, [:command] => 'deploy:set_rails_env' do |task, args| on primary(:app) do within current_path do with :rails_env => fetch(:rails_env) do rake args[:command] ...
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Combine multiple Collections into a single logical Collection?

...terate over all elements (ideally, read only). I'm using guava collections and I wonder how I could use guava iterables/iterators to generate a logical view on the internal collections without making temporary copies. ...
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Send response to all clients except sender

... use socket.emit back who sends it or you can group the conncected clients and do @Crashalot – ujwal dhakal Nov 19 '15 at 18:36 add a comment  |  ...
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postgres: upgrade a user to be a superuser?

... and how can i detect if myuser is currently superuser? – masterweily May 10 '13 at 8:18 20 ...
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Why use non-member begin and end functions in C++11?

Every standard container has a begin and end method for returning iterators for that container. However, C++11 has apparently introduced free functions called std::begin and std::end which call the begin and end member functions. So, instead of writing ...
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Go build: “Cannot find package” (even though GOPATH is set)

...e your foobar.go source file is not in a directory called foobar. go build and go install try to match directories, not source files. Set $GOPATH to a valid directory, e.g. export GOPATH="$HOME/go" Move foobar.go to $GOPATH/src/foobar/foobar.go and building should work just fine. Additional reco...
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How to set a Django model field's default value to a function call / callable (e.g., a date relative

...e class. PRE Django 1.7 Django lets you pass a callable as the default, and it will invoke it each time, just as you want: from datetime import datetime, timedelta class MyModel(models.Model): # default to 1 day from now my_date = models.DateTimeField(default=lambda: datetime.now() + timedel...
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Bootstrap Carousel : Remove auto slide

... That will make the auto sliding stop because there no Milliseconds added and will never slider next. Via Html By adding data-interval="false" and removing data-ride="carousel" <div id="carouselExampleCaptions" class="carousel slide" data-ride="carousel"> becomes: <div id="carousel...
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Python vs Bash - In which kind of tasks each one outruns the other performance-wise? [closed]

...anguages in their own right while being optimized to efficiently pass data and control to and from other executing processes written in any language the O/S supports. Most Linux applications, regardless what language the bulk of the program is written in, depend on shell scripts and Bash has become...
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Java multiline string

...n in String.format. Another option is to put the resource in a text file, and just read the contents of that file. This would be preferable for very large strings to avoid unnecessarily bloating your class files. share ...