IRAF help page for package language, program hidetask

• task

hidetask task [task ...]

task

If a task is only to be called from other tasks, and is not normally invoked directly by the user, then it may be useful to `hide' the task, i.e., omit it from the list of tasks listed in the "?" and "??" commands. The hidetask command performs this function.

1. Define the task "_rew" and hide it from the user. The purpose of the leading underscore (not required) is to ensure that the user does not accidentally run the task.

cl> task $_rew = "home$rew.e"
cl> hide _rew

2. Display the contents of the language package, including all hidden tasks (the _ does the trick).

cl> ?_ lan
    language:
      ?             chdir         defpar        history       radix
      ??            cl            deftask       jobs          redefine
      _allocate     clbye         edit          keep          scan
      _curpack      clear         ehistory      kill          service
      _deallocate   clpackage     envget        language      set
      _devstatus    d_f           eparam        logout        show
      access        d_l           error         lparam        sleep
      back          d_off         flprcache     mktemp        task
      beep          d_on          fprint        osfn          time
      bye           d_p           fscan         package       unlearn
      cache         d_t           gflush        prcache       update
      cd            defpac        hidetask      print         wait

SEE ALSO,