s/Using b/B/ -- Raul
On Fri, Jan 6, 2012 at 11:48 AM, Raul Miller <rauldmil...@gmail.com> wrote: > On Fri, Jan 6, 2012 at 11:36 AM, Blake McBride <bl...@mcbride.name> wrote: >> Yes, I am picking that up. >> >> One important take-away to this is that in J, when doing indexed >> assignments, one should put that code on its own, separate line of >> code. One shouldn't create a "one-liner" by combining it with other >> code. Using indexed assignments in the middle of a "one-liner" causes >> a copy. >> >> Does that statement sound right? > > I would phrase your last sentence differently: > > "Using breaking up an index assignment with a "one-liner" causes a copy". > > Consider this case as an example of an indexed assignment in the > middle of a one-liner: > > B=: C=: 0 > A=: 2 32 64 32 > > (A=: B C} A) | _1 > _1 31 63 31 > > That said, note that quite often, when building an application, there > are alternatives which will be significantly faster than indexed > assignment. But others have already treated this issue. > > -- > Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
