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How to fix the uninitialized constant Rake::DSL problem on Heroku?

....9.1/rake.rb:2373:in `load' /usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile' /usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile' /usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling' /usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefil...
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How to multiply duration by integer?

... That's nice, but why is it possible to multiply a Duration by a raw integer (not in a variable), like: time.Sleep(100 * time.Millisecond) AFAIK, 100 is not a Duration – carnicer Jul 5 at 12:01 ...
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Differences between socket.io and websockets

...n disable Ajax long-polling and directly connect via WebSocket just like a raw WebSocket connection. In this way, you get everything except the 180kb library as equals. Using WebSocket directly is painful unless you just need the bare minimum. Dropping rooms and access to the community IP is daun...
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String variable interpolation Java [duplicate]

...://en.wikipedia.org/wiki/Variable_interpolation Edit As of 2019, JEP 326 (Raw String Literals) was withdrawn and superseeded by JEP 355 (Text Blocks). The latter tries to introduce "Text Blocks" into the language: A text block is a multi-line string literal that avoids the need for most escap...
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Pretty graphs and charts in Python [closed]

...ting library from the folks at Enthought. It uses Enthought's Kiva vector drawing library and currently works only with Wx and Qt with OpenGL on the way (Matplotlib has backends for Tk, Qt, Wx, Cocoa, and many image types such as PDF, EPS, PNG, etc.). The main advantages of Chaco are its speed relat...
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Decode Base64 data in Java

... Almost good: this only accepts raw base64 streams, not base64 files. I had to use final byte[] decoded = Base64.getMimeDecoder().decode(encoded); instead. But thanks anyway! (Nice with commons-io FileUtils.readFileToByteArray and FileUtils.writeByteArrayTo...
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Can I change the height of an image in CSS :before/:after pseudo-elements?

...ages/pdf.png'); transform: scale(.5); } http://jsfiddle.net/Nwupm/ Drawbacks: you need to know the intrinsic dimensions of the image, and it leaves you with some whitespace, which I can't get rid of ATM. share ...
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Text size and different android screen sizes

...ilable after the system accounts for screen density (as opposed to using raw pixel resolution). For more information about density-independent pixels, read Terms and concepts, earlier in this document. Using new size qualifiers The different resource configurations that you can specify ...
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Homebrew’s `git` not using completion

...tion working on OSX without having to restart your terminal: curl https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash -o ~/.git-completion.bash && echo "source ~/.git-completion.bash" >> ~/.bash_profile && source ~/.bash_profile ...
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How can I catch all the exceptions that will be thrown through reading and writing a file?

... While I agree it's not good style to catch a raw Exception, there are ways of handling exceptions which provide for superior logging, and the ability to handle the unexpected. Since you are in an exceptional state, you are probably more interested in getting good inform...