Thank you very much all the information were super I got some problem on the difference between atom variable and list of single element that is clear now
Paolo On Wed, Jul 8, 2015 at 1:19 PM, 'Bo Jacoby' via Programming < [email protected]> wrote: > I wonder who takes away the linefeeds from my emails to programming forum. > They are incomprehensible anyway so further destruction is not needed. :) > > > > Den 13:00 onsdag den 8. juli 2015 skrev Joe Bogner < > [email protected]>: > > > > Good question! That has tripped up many people (including myself) > > Elaborating on both fine answers: > > If you aren't sure why you need enclose the atom in a list, this might > help: > > Question: What are the shapes of each of the items in the list? > > $ each ;: 'cc dd f h gg zz' > ┌─┬─┬─┬─┬─┬─┐ > │2│2│1│1│2│2│ > └─┴─┴─┴─┴─┴─┘ > > Question: What is the shape of a boxed atom? > $ <'h' > > (empty) -- it's not a list > > Another point from NuVoc that might help: > > http://www.jsoftware.com/jwiki/Vocabulary/ecapdot > > "Create a Boolean array indicating starting points in y of subarrays > equal to x" -- see point above about <'h' not being a list and > therefore no subarray will equal to it > > > > On Wed, Jul 8, 2015 at 6:04 AM, Brian Schott <[email protected]> > wrote: > > Elaborating on Bo's fine answer and (hopefully) adding line feeds. > > > > (<'h') E. each a > > ┌───┬───┬─┬─┬───┬───┐ > > │0 0│0 0│0│1│0 0│0 0│ > > └───┴───┴─┴─┴───┴───┘ > > (<,'h') E. a > > 0 0 0 1 0 0 > > (<,'dd') E. a > > 0 1 0 0 0 0 > > > > > > > > > > -- > > (B=) > > ---------------------------------------------------------------------- > > 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 > -- We are made of star dust (Carl Sagan) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
