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There are a few Mathematica users beside myself that are running it on a Raspberry Pi, and we found out it does not always perform the same as the Desktop version [1][2]. During the testing of the prerelease it became obvious that some of the functions are too complex for the not-very-fast [3][4] Pi. So Wolfram decided to omit them from the Pi release branch. Which functions are omitted is not currently documented, so I'd like to find out this on my own.

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We can get the list of all built-in functions with Information:

Information["*"]

However, this function prints its output to a special stream called $Urgent [5]. So to be able to manipulate the output, it needs to be redirected, for example to a text file. I ran this both on a desktop (OS X) version and a Raspberry Pi version of Mathematica V10:

infoFile = OpenWrite["output.txt"]
Block[{$Urgent = infoFile}, Information["*"]]
Close[infoFile]

And then compared the two function lists. The functions included only in the desktop version are:

Complement @@ (StringSplit[Import[#]] & /@ {"output.txt", 
    "pi-output.txt"})
{Absolute,AllowKernelInitialization,Ascending,Associate,CelestialSystem,ConsoleMessage,
CreateDatabase,Decimate,DeclareKnownSymbols,Descending,DisplayWith,DisplayWithRef,
DisplayWithVariable,DrawEdges,DrawFrontFaces,EclipseType,EdgeCapForm,EdgeColor,EdgeDashing,
EdgeJoinForm,EdgeOpacity,EdgeThickness,EmbedCode,EmbeddingObject,ExternalTypeSignature,FailedQ,
FinishDynamic,\[FormalX]$,FrontFaceColor,FrontFaceOpacity,GraphicsColor,GraphicsHighlightColor,
LineColor,LineOpacity,LunarEclipse,MoonPhase,MoonPosition,NewPrimitiveStyle,
RectangleBoxOptions,RefBox,SelectionDebuggerTag,SiderealTime,Slice,SolarEclipse,SunPosition,
Sunrise,Sunset,TemplateBlock,TimeDirection,UpdateDynamicObjects,UpdateDynamicObjectsSynchronous,
$EmbedCodeEnvironments,$InterfaceEnvironment,$SynchronousEvaluation}

The Pi version also has some exclusive functions:

Complement @@ (StringSplit[Import[#]] & /@ 
   {"pi-output.txt", "output.txt"})
{AssociationFormat,AssociationMap,BooleanStrings,CloudAccountData,CountDistinct,CountDistinctBy,
DataForm,DeleteDuplicatesBy,ElidedForms,ExternalBundle,FailureAction,FormTheme,IndexBy,
ItemAspectRatio,ListFormat,MissingBehavior,MissingString,PartBehavior,Pivot,Query,TimeFormat,
URLBuild,URLDecode,URLEncode,URLExecute,URLExistsQ,URLExpand,URLParse,URLQueryDecode,
URLQueryEncode,URLShorten,ValidateQuery,$CloudCreditsAvailable,$HTMLExportRules,$TemplatePath}
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    $\begingroup$ Something is incorrect here... Those functions are not exclusive to the Pi. They're all in my copy of v10. $\endgroup$
    – rm -rf
    Aug 14, 2014 at 12:26
  • $\begingroup$ @rm-rf Is this a bug in Information then? $\endgroup$
    – shrx
    Aug 14, 2014 at 12:31
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    $\begingroup$ Any idea where Decimate came from? I totally want to do this in Mathematica. $\endgroup$ Aug 14, 2014 at 12:56
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    $\begingroup$ @shrx I don't know. I typically use Names for this, not Information. $\endgroup$
    – rm -rf
    Aug 14, 2014 at 12:57
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    $\begingroup$ Names["*"] and Information["*"] give exactly the same list of symbols (after Remove["Global`*"]), so there is no need to parse the output of Information... $\endgroup$ Aug 14, 2014 at 15:52

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