The
:history
and
:h?
e.g. view and search the REPL history:
scala> :h? req
19 :require /git/BIDMach/BIDMach.jar
20 :require /git/BIDMat/BIDMat.jar
21 :require /git/BIDMach_Spark/BIDMach_Spark.jar
27 :require /git/BIDMach_Spark/BIDMatHDFS.jar
28 :require /git/BIDMach_Spark/BIDMach_Spark.jar
Show last K entries:
:history 10
26 :load /git/BIDMach_Spark/scripts/KMeansLearner.ssc
27 :require /git/BIDMach_Spark/BIDMatHDFS.jar
28 :require /git/BIDMach_Spark/BIDMach_Spark.jar
29 :require /git/BIDMach/BIDMach.jar
30 :load /git/BIDMach_Spark/scripts/KMeansLearner.ssc
31 :q
32 :require /git/BIDMat/BIDMat.jar
33 :?
34 :help
35 :h?
How do we execute the numbered history entry?
Following has been tried
:!29
:history 29
:29
Does this support exist? Or just supposed to cut and paste?
scala> :help
All commands can be abbreviated, e.g., :he instead of :help.
:edit <id>|<line> edit history //<-- hmm, this looks interesting
:help [command] print this summary or command-specific help
:history [num] show the history (optional num is commands to show)
:h? <string> search the history
.....//etc.
scala> :hi 6
2524 val predicate: Int => Boolean = _ > 3
2525 import scala.annotation._
2526 List(3,5,7,9,11).filter(_ %3 == 0)
2527 Vector('a','b','c').length
2528 :help
2529 :hi 6
scala> :e 2526
Placing text in recent history. // follow this with a single up-arrow
scala> List(3,5,7,9,11).filter(_ %3 == 1) // now this can be edited/executed
res6: List[Int] = List(7)
scala> :e predicate
Placing text in recent history. // up-arrow again
scala> val predicate: Int => Boolean = _ > 4 // edit and execute
predicate: Int => Boolean = <function1>