Oleg, The best source of information about jod is the jod.pdf. It can be seen at:
http://bakerjd99.googlepages.com/jod.pdf You are correct about the representation used in dump files being inefficient for character data. The dump files in jodsource are complete dictionary dumps - essentially long JOD scripts that can rebuild the binary jfiles dictionary. I wrote the dump code a number of years ago and my main concern was to produce something that was absolutely portable and editable on just about anything. The wrapped a. encoding does this by avoiding all character translation and and "strange character" behaviour. The wrapping also circuments any line length limitations in J and external editors. This brute force approach has held up well and even handled new datatypes (like unicode) without a hiccup. What J really needs is a new 5!:n call that generates a zip style compressed byte stream for any J object that is constructed from only visible ASCII characters. Then we could have maximum portability and low byte counts. On Thu, Oct 9, 2008 at 1:31 PM, Oleg Kobchenko <[EMAIL PROTECTED]> wrote: > JOD is an interesting project. It looks like > it manages J definitions. Is there a list of features > or datasheet with a list of things what it is capable > of to get an idea what to expect before actually fully > learning it. > > For example, is there a GUI to manage these definitions? > > Also there is the JOD source addon, which is noticeable > by its size and casually looking into it is shows some > kind of encoding. From first impression it may not be > most efficient. What is the reasoning behind it? > > For example, here JOD encoding is more than 2.5 times larger > than ascii85 encoding. > > load'general/jod' > ('zz';61) wraplinear_ajodmake_ (3 : '5!:5<''y''')a.{~ ?.~255 > zz=:'' > zz=:zz,'246 220 69 151 40 194 29 168 174 89 196 53 13 181 4 107 63 17' > zz=:zz,'5 82 249 12 193 121 187 19 186 88 242 114 231 80 96 150 147 1' > zz=:zz,'77 66 211 162 153 160 136 61 169 14 36 127 129 7 203 182 208 ' > zz=:zz,'195 133 239 243 49 117 98 100 138 157 116 5 202 142 52 200 23' > zz=:zz,'6 118 55 188 170 86 244 25 207 84 85 51 226 171 143 67 210 21' > zz=:zz,'8 234 158 120 35 173 212 183 59 101 237 190 238 180 131 206 1' > zz=:zz,'39 201 179 224 223 184 43 232 140 227 216 132 154 222 104 0 1' > zz=:zz,'5 78 122 39 8 50 251 192 109 47 229 247 245 204 23 230 165 17' > zz=:zz,'2 115 191 163 110 38 233 77 253 42 6 79 34 105 106 75 44 21 2' > zz=:zz,'0 144 95 130 56 60 111 141 3 221 164 87 112 10 94 235 228 81 ' > zz=:zz,'54 74 103 250 128 185 73 17 102 135 152 123 225 33 9 197 137 ' > zz=:zz,'46 83 18 26 97 214 159 217 134 32 71 70 31 16 64 93 248 156 9' > zz=:zz,'2 2 252 205 45 37 22 11 146 254 198 48 57 213 27 108 68 215 1' > zz=:zz,'24 65 91 145 176 58 209 113 62 219 28 119 166 76 99 240 148 1' > zz=:zz,'67 90 189 72 149 1 30 41 161 199 126 24 155 178 241 125{a. ' > zz=:912{.zz > #('zz';61) wraplinear_ajodmake_ (3 : '5!:5<''y''')a.{~ ?.~255 > 1083 > > load'convert/misc/ascii85' > 'zz=:fromascii85 0 : 0',LF,')',~toascii85 a.{~ ?.~255 > zz=:fromascii85 0 : 0 > p=r*'.)I"'Y$&\#%CH=S5Hdu\%)I5$'=q<:Ep$8,QBSR?e"W8'Lcq^I,_(@MbI5d8L%"UfF^em= > STG%XN\niDFuR(6<qI9U<)ka6X,fWrg?P8S,H]J)4([fnm^.VlMoi<`hmb3#N8rQDRbh]X%o.Eu > #Vu:mD(k#Foun67V6"aQUM_FC:&QOG:EjLf9.UelOC*T!4E$2]h5"+k$=<&Z;)V$ZqLH+J&S?fc > Hf6+S`JH3G&[EMAIL PROTECTED] > +R35[F/T>QXiJ/L;/?P5`HT3Ro'b7+ZfP>EQ-Nd;_A)*-\8RA+5_\ > >.mIl!?N\`a*nkpZLN> > ~> > ) > #'zz=:fromascii85 0 : 0',LF,')',~toascii85 a.{~ ?.~255 > 404 > > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
