https://www.jsoftware.com/help/dictionary/csel.htm
But, also, https://www.jsoftware.com/help/dictionary/d520.htm and https://www.jsoftware.com/help/dictionary/d621.htm But it's usually not wise to make efficiency claims which are not supported by benchmarks. And, benchmarks tend to be specific to workloads and implementation versions (with a plausible exception when the timing differences exceed a factor of 2). Thanks, -- Raul On Wed, Dec 11, 2019 at 11:05 AM 'Jim Russell' via Programming <[email protected]> wrote: > > Yes but... > I'd contend that a string of tests is usually less efficient than (perhaps > calculating) some numeric value that is amenable to a case statement. ( I > should have checked first; J does have a case statement, does it not?) > > > On Dec 11, 2019, at 10:32 AM, Henry Rich <[email protected]> wrote: > > > > Yes. > > > > Henry Rich > > > >> On 12/11/2019 5:46 AM, 'Mike Day' via Programming wrote: > >> So is it still ok in J9 - and will it be ok - to continue using the > >> following paradigm? > >> > >> if. T do. B > >> elseif. T1 do. B1 > >> elseif. T2 do. B2 > >> end. > >> > >> Thanks, > >> > >> Mike > >> > >> > >>> On 11/12/2019 10:23, Henry Rich wrote: > >>> else. after elseif. is new in 9.01, and you found a bug in it. > >>> > >>> JfC is for J6.02. > >>> > >>> Henry Rich > >>> > >>> On 12/10/2019 8:23 PM, Ben Gorte wrote: > >>>> Hi, > >>>> > >>>> Despite repeated warnings in JforC I stepped into the trap of using > >>>> elseif. > >>>> and else. in the same if.-statement. It took some effort to find that > >>>> error, because the behaviour is kind of weird: > >>>> > >>>> iftest =: 3 : 0 > >>>> if. y=1 do. > >>>> echo 'one' > >>>> elseif. y=2 do. > >>>> echo 'two' > >>>> elseif. y=3 do. > >>>> echo 'three' > >>>> else. NB. should be elseif. do. > >>>> echo 'other' > >>>> end. > >>>> ) > >>>> > >>>> iftest 1 > >>>> one > >>>> other > >>>> iftest 2 > >>>> two > >>>> other > >>>> iftest 3 > >>>> three > >>>> iftest 4 > >>>> other > >>>> > >>>> Wouldn't it be possible to have that working like expected? Or elseif do > >>>> flag an error? > >>>> > >>>> Greetings, > >>>> Ben > >>>> ---------------------------------------------------------------------- > >>>> For information about J forums see http://www.jsoftware.com/forums.htm > >>> > >>> ---------------------------------------------------------------------- > >>> For information about J forums see http://www.jsoftware.com/forums.htm > >> > >> ---------------------------------------------------------------------- > >> For information about J forums see http://www.jsoftware.com/forums.htm > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
