An Xcode build from the command line looks like: xcodebuild -configuration ${BUILD_TYPE} -target ${TARGET_NAME} -arch ${CPU_ARCHITECTURE} -sdk ${SIMULATOR_OR_IOS_SDK} BUILD_TYPE is something like "Release" or "Debug" (those are the defaults, you may have added others to the project) TARGET_NAME is the name of the target you are building (by default the same name as your project) CPU_ARCHITECTURE i
If your application is not interactive, and GC pauses are not an issue for you, there shouldn't be any problem for 64-bit Java to handle very large heaps, even in hundreds of GBs. We also haven't noticed any stability issues on either Windows or Linux. However, when you need to keep GC pauses low, things get really nasty: Forget the default throughput, stop-the-world GC. It will pause you applicat
The term "referential transparency" comes from analytical philosophy, the branch of philosophy that analyzes natural language constructs, statements and arguments based on the methods of logic and mathematics. In other words, it is the closest subject outside computer science to what we call programming language semantics. The philosopher Willard Quine was responsible for initiating the concept of
Several of our users have asked us to include data relative to their account in the HTTP headers of requests we send them, or even responses they get from our API. What is the general convention to add custom HTTP headers, in terms of naming, format... etc. Also, feel free to post any smart usage of these that you stumbled upon on the web; We're trying to implement this using what's best out there
Updated to Android Studio 3.0 Please share missing items in comments. A late answer but this alternative answer was not right for us ... So, here's our gitignore file: #built application files *.apk *.ap_ *.aab # files for the dex VM *.dex # Java class files *.class # generated files bin/ gen/ # Local configuration file (sdk path, etc) local.properties # Windows thumbnail db Thumbs.db # OSX files
The absurd function in Data.Void has the following signature, where Void is the logically uninhabited type exported by that package: -- | Since 'Void' values logically don't exist, this witnesses the logical -- reasoning tool of \"ex falso quodlibet\". absurd :: Void -> a I do know enough logic to get the documentation's remark that this corresponds, by the propositions-as-types correspondence, to
How can you tell, from the command line, how many cores are on the machine when you're running Mac OS X? On Linux, I use: x=$(awk '/^processor/ {++n} END {print n+1}' /proc/cpuinfo) It's not perfect, but it's close. This is intended to get fed to make, which is why it gives a result 1 higher than the actual number. And I know the above code can be written denser in Perl or can be written using gre
Algebras I think the place to start would be to understand the idea of an algebra. This is just a generalization of algebraic structures like groups, rings, monoids and so on. Most of the time, these things are introduced in terms of sets, but since we're among friends, I'll talk about Haskell types instead. (I can't resist using some Greek letters though—they make everything look cooler!) An alge
how to find out why this solution is so slow. Are there any commands that tell me where most of the computation-time is spend so I know which part of my haskell-program is slow? Precisely! GHC provides many excellent tools, including: runtime statistics time profiling heap profiling thread analysis core analysis. comparative benchmarking GC tuning A tutorial on using time and space profiling is pa
Background This question arises from a challenge Brent Yorgey posed at OPLSS: write a function f :: (Int -> Int) -> Bool that distinguishes f undefined from f (\x -> undefined). All of our answers either used seq or something like bang patterns that desugar into seq. For example: f :: (Int -> Int) -> Bool f g = g `seq` True *Main> f undefined *** Exception: Prelude.undefined *Main> f (\x -> undefi
I'm trying to visualize some simple automatic physical systems (such things as pendulum, robot arms,etc.) in Haskell. Often those systems can be described by equations like df/dt = c*f(t) + u(t) where u(t) represents some kind of 'intelligent control'. Those systems look to fit very nicely in the Functional Reactive Programming paradigm. So I grabbed the book "The Haskell School of Expression" by
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