Adding the load for jfiles
 load '~addons/data/jfiles/jfiles.ijs'

will let the lab run without problems

So the whole change is like this

NB. open '~system\extras\labs\system\mappeddb.ijs'
NB. load '~system\extras\labs\system\mappeddb.ijs'
 open '~addons\labs\labs\system\mappeddb.ijs'
 load '~addons\labs\labs\system\mappeddb.ijs'
 load '~addons/data/jfiles/jfiles.ijs'

2011/11/27 Björn Helgason <[email protected]>

> You may want to look at the mapped file database lab.
>
> It has a very advanced database demo doing similar things.
>
> If you use the J7 lab you need to put in this fix
>
> NB. open '~system\extras\labs\system\mappeddb.ijs'
> NB. load '~system\extras\labs\system\mappeddb.ijs'
>  open '~addons\labs\labs\system\mappeddb.ijs'
>  load '~addons\labs\labs\system\mappeddb.ijs'
>
> You can do it when arriving at that step and then go on
>
> The verb jcreate is also missing in J7 but for now you can just step past
> it
>
>
> 2011/11/27 Skip Cave <[email protected]>
>
>> Yes, the data is mixed. The first column is an integer, and the second
>> column (and all subsequent columns) will be text.
>>
>> ;: inv"1 ts2    NB. Arie's first suggestion
>> |domain error
>> |       ;:inv"1 ts2
>>
>>     ; <@(LF ,~ ;:inv)"1 ] 8!:0 ts2     NB. Ric's suggestion
>> |rank error
>> |   ;<@(LF,~;:inv)"1]    8!:0 ts2
>>
>>     require 'tables/dsv'   NB. Ric's second suggestion
>>     (' ';'') makedsv ts2
>> 355  freeways
>> 356  traffic
>> 357  ninety one west
>> 358  yes
>> 361  sixty
>>
>> NB.  That works!
>>
>>  ; <@(LF ,~ ;:inv)"1 ts2  NB. Ric's third suggestion
>> |domain error
>> |   ;    <@(LF,~;:inv)"1 ts2
>>
>>   f =: 3 :'(":>{.y),'' '',>{:y'  NB. Eelvex's suggestion
>>   f"1 ts2
>> 355  freeways
>> 356  traffic
>> 357  ninety one west
>> 358  yes
>> 361  sixty
>>
>> NB. That works also!
>>
>>   fmtmat ts2       NB. Raul's suggestion
>> 355  freeways
>>
>> 356  traffic
>>
>> 357  ninety one west
>>
>> 358  yes
>>
>> 361  sixty
>>
>>  That works, but with extra line feeds.
>>
>> Skip
>>
>> On Sun, Nov 27, 2011 at 6:55 AM, Raul Miller <[email protected]>
>> wrote:
>>
>> > fmtmat=:3 :0
>> >  r=. 0 0$t=. 9!:6''
>> >  try.
>> >    9!:7 ' '"0 t
>> >    r=. ": y
>> >  catch. end.
>> >  9!:7 t
>> >  d=. 1#~#$r
>> >  d }. (-d) }. r
>> > )
>> >
>> >   fmtmat ts2
>> >
>> > --
>> > Raul
>> > ----------------------------------------------------------------------
>> > For information about J forums see http://www.jsoftware.com/forums.htm
>> >
>>
>>
>>
>> --
>> Skip Cave
>> Cave Consulting LLC
>> Phone: 214-460-4861
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
>>
>
>
>
> --
> Björn Helgason, Verkfræðingur
> Fornustekkum II
> 781 Hornafirði,
> t-póst: [email protected]
> gsm: +3546985532
> twitter: @flugfiskur
> http://groups.google.com/group/J-Programming
>
>
> Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans
>
> góður kennari getur stigið á tær án þess að glansinn fari af skónum
>           /|_      .-----------------------------------.
>          ,'  .\  /  | Með léttri lund verður        |
>      ,--'    _,'   | Dagurinn í dag                     |
>     /       /       | Enn betri en gærdagurinn  |
>    (   -.  |        `-----------------------------------'
>    |     ) |         (\_ _/)
>   (`-.  '--.)       (='.'=)   ♖♘♗♕♔♙
>    `. )----'        (")_(") ☃☠
>



-- 
Björn Helgason, Verkfræðingur
Fornustekkum II
781 Hornafirði,
t-póst: [email protected]
gsm: +3546985532
twitter: @flugfiskur
http://groups.google.com/group/J-Programming


Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans

góður kennari getur stigið á tær án þess að glansinn fari af skónum
          /|_      .-----------------------------------.
         ,'  .\  /  | Með léttri lund verður        |
     ,--'    _,'   | Dagurinn í dag                     |
    /       /       | Enn betri en gærdagurinn  |
   (   -.  |        `-----------------------------------'
   |     ) |         (\_ _/)
  (`-.  '--.)       (='.'=)   ♖♘♗♕♔♙
   `. )----'        (")_(") ☃☠
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm

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