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Common Lisp has a detailed file compilation model as part of the standard language. The model supports compiling the program to object files in one environment, and loading them into an image in another environment. There is nothing comparable in Scheme. No eval-when, or compile-file, load-time-value or concepts like what is an externalizable object, how semantics in compiled code must agree with

I'm experimenting with Swift protocol extensions and I found this quite confusing behaviour. Could you help me how to get the result I want? See the comments on the last 4 lines of the code. (You can copy paste it to Xcode7 playground if you want). Thank you!! protocol Color { } extension Color { var color : String { return "Default color" } } protocol RedColor: Color { } extension RedColor { var

Has anyone been able to successfully deploy an app on Heroku with the Heroku Common Lisp Buildpack using Hunchentoot? I'm getting a ! Heroku push rejected, no Cedar-supported app detected and I'm not sure if I'm doing something wrong, or if it isn't supported yet UPDATE: The above error was due to a missing heroku-setup.lisp file. Heroku now accepts the push, but trying to access the website gives

I am looking for step-by-step instructions to create, build, run and debug a first Rust application inside the Atom editor. So far I have installed the Atom editor, installed the package language-rust, and fruitlessly tried to find an option inside the editor to create a Rust "project" or "package", and my google-fu failed miserably. Disclaimer: I am on Windows, very familiar with Visual Studio an

I am curious: scala> Some(null) == None res10: Boolean = false Why isn't Some(null) transformed to None?

Running my sbt build, I get the following unresolved dependencies. [warn] :::::::::::::::::::::::::::::::::::::::::::::: [warn] :: UNRESOLVED DEPENDENCIES :: [warn] :::::::::::::::::::::::::::::::::::::::::::::: [warn] :: com.typesafe.play#sbt-link;2.2.0: not found [warn] :: com.typesafe.play#play-exceptions;2.2.0: not found [warn] :: com.typesafe.play#routes-compiler_2.10;2.2.0: not found [warn]

Let's say I have a type Person import GHC.Generics import Data.Text import Data.Aeson import Control.Lens data Person = Person { _firstName :: Text, _lastName :: Text, _age :: Int } deriving (Show, Generic) And I want to automatically derive Lenses and JSON typeclasses for it makeLenses ''Person instance FromJSON Person instance ToJSON Person This works correctly, however DeriveGeneric sees my fie

I followed the play deployment instruction and used "play clean stage" to package the application. After uploading the package to an aws EC2 instance, I tried to start it with the command: target/universal/stage/bin/myapp -Dconfig.file=target/universal/stage/conf/application.conf But it failed with the message: OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000c5550000, 715849728

I read What's new in Xcode 6. The article introduces some new feature about Xcode 6, and it says: Command Line Xcode’s debugger includes an interactive version of the Swift language, known as the REPL (Read-Eval-Print-Loop). Use Swift syntax to evaluate and interact with your running app or write new code in a script-like environment. The REPL is available from within LLDB in Xcode’s console, or f

I have an array of hashes: [ { :foo => 'foo', :bar => 2 }, { :foo => 'foo', :bar => 3 }, { :foo => 'foo', :bar => 5 }, ] I am trying to sort this array in descending order according to the value of :bar in each hash. I am using sort_by to sort above array: a.sort_by { |h| h[:bar] } However, this sorts the array in ascending order. How do I make it sort in descending order? One solution was to do f

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