if xoring bits, yes. When the word pad comes up in the same sentence, I thought you might want to xor bytes.
----- Original Message ----- From: Jon Hough <[email protected]> To: "[email protected]" <[email protected]> Cc: Sent: Wednesday, December 3, 2014 8:19 PM Subject: Re: [Jprogramming] Pad Arrays for XORing Should I not use ~: for XORing? e.g. if a =: 1 0 1 1 1 1 1and b =: 0 1 0 1 1 > Date: Thu, 4 Dec 2014 01:11:05 +0000 > From: [email protected] > To: [email protected] > Subject: Re: [Jprogramming] Pad Arrays for XORing > > ,: will pad whatever side is shortest > > (i.5) ,: i.3 > 0 1 2 3 4 > 0 1 2 0 0 > > > for xor > > (i.5) (22 b.)/@:,: i.3 > 0 0 0 3 4 > > > ----- Original Message ----- > From: Jon Hough <[email protected]> > To: "[email protected]" <[email protected]> > Cc: > Sent: Wednesday, December 3, 2014 7:56 PM > Subject: [Jprogramming] Pad Arrays for XORing > > If I want to XOR two arrays (~:), I run into a problem if the two arrays are > of different length. > So before XORing I use my "pad" dyadic verb which pads zeros onto the front > of the right argument (which is assumed to be the shorter array). > > pad =: ((#&0)@:(([: # [) - ([: # ]))) , ] > > > I imagine this problem is common, so is there a standard verb to do this? I > think my verb is not the most elegant, and it has the deficiency of assuming > the right argument is the shorter. > > ---------------------------------------------------------------------- > 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
