Scala REPL equivalent for R ls( ) function

Question

Is there any command in Scala REPL that will print out the objects already defined? For example, in R console, the function ls() prints all the defined objects in the current environment.

Answer 1

There is no simple function as ls() in R for Scala. But one can do similar things in the following way:

val ls = $intp
ls.allDefinedNames.foreach(println)

ls.+tab will give the following options:

scala> ls.
SparkComputedImports        addImports                  addUrlsToClassPath          allDefinedNames             allImportedNames            asInstanceOf                
beQuietDuring               beSilentDuring              bind                        classOfTerm                 classServerUri              classSymbols                
clearExecutionWrapper       close                       compileSources              compileString               definedSymbolList           definedSymbols              
definedTerms                definedTypes                definitionForName           directBind                  executionWrapper            fallback                    
generatedName               getClassOutputDirectory     global                      implicitSymbols             implicitSymbolsBySource     importedSymbols             
importedSymbolsBySource     importedTermNamed           importedTermSymbols         importedTerms               importedTypeSymbols         importedTypes               
initializeSynchronous       interpret                   interpretSynthetic          isInstanceOf                isNoImports                 isNoPredef                  
isReportingErrors           languageSymbols             languageWildcardHandlers    languageWildcardSyms        languageWildcards           lastWarnings                
methodSymbols               mostRecentVar               namedDefinedTerms           out                         parse                       pathToName                  
rebind                      requestForIdent             requestForName              requestForReqId             requestHistoryForName       reset                       
runtimeClassAndTypeOfTerm   runtimeTypeOfTerm           sessionImportedSymbols      sessionWildcards            setExecutionWrapper         symbolOfLine                
symbolOfTerm                toString                    treesForRequestId           typeOfExpression            typeOfTerm                  valueOfTerm                 
visibleTermNames            wildcardTypes