[CSCI2321] Cleaning up your J files in your copy of cs2321

[John Howland]

On Tue, 15 Feb 2005, John Howland wrote:

> I have had to make a number of changes in our J files which model
> various aspects of computer architecture.  These changes are mandated
> by changes in the J standard library since the last time I taught this
> course (2001) and also by the fact that even though the J language predates
> Java, its use of .js as an extension for J files was ignored by the Java
> community.  Hence, the J community has adopted the convention of using
> .ijs as an extension for J script files (the i is in honor of Dr. Kenneth Iverson).
> 
> You should clean up your cs2321 directory by executing the following commands
> after logging into one of our Unix (Linux) client machines.
> 
> 1)  change to your cs2321 directory
> 
> cd cs2321
> 
> 2)  remove the j shell script which is used to start j
>     and all .js files and all .ijs files

Except (of course) those .js files which you have created.  Those can be converted by
changing each explicit definition beginning with:

monad define script

to

monad define

and each explicit definition beginning with:

monad define ' ... '

to 

monad def ' ... '

> 
> rm j *.js *.ijs
> 
> 3)  copy a new j script and the new .ijs files for our course
> 
> cp ~jhowland/cs2321/j  ~jhowland/cs2321/*.ijs  ./
> 
> You should do this before class tomorrow so that you can use J
> during the lecture so that you can follow what we do during the
> lecture.
> 
> Many of the changes accomplished above are subtle, but three obvious
> differences are that code which used to read
> 
> foo =: monad define script
> ...
> )
> 
> is changed to
> 
> foo =: monad define
> ...
> )
> 
> because define has changed from ":" to ":0"
> 
> and a new definiton of 
> 
> def =: :
> 
> has been introduced.
> 
> Finally, script is no longer "0", but rather it is now a function
> 
>    script
> [: 3 : '0!:0 y.' jpath_z_&.:>
> 
> I apologize for the minor disruption these changes may cause, but
> making the change does not change the readability of our models and
> will make our future definitions compatible with the J standard
> library conventions.
> 
> 
> 

-- 
_______________________________________________________________
John E. Howland       url: http://www.cs.trinity.edu/~jhowland/
Computer Science    email: jhowland at ariel.cs.trinity.edu
Trinity University  voice: (210) 999-7364
One Trinity Place     fax: (210) 999-7477
San Antonio, Texas  78212-7200