[Jprogramming] J script files

[ramacd]

Dan Bron wrote:
> This is easy to see if we take a reductionist approach: a single J 
> token is either a built-in J primitive, or it's a user-defined name 
> with an arbitrary definition. Primitives never change their definition 
> (good thing!). And the dictionary of J explicitly states, at 
> http://www.jsoftware.com/help/dictionary/dict2.htm that:
Primitives don't change their definition over a single version of  J, 
that is true.  Over multiple versions it is a different story. In fact, 
I long ago coined a term ("getting henked") for the suffering one 
undergoes when one assumes upward compatibility.

On the original idea of this thread, having a REPL facility, which 
doesn't come in primitive-only J, doesn't strike me as a stretch of its 
capabilities. I do wonder at the (if you want a responsive computer, 
don't let a user near J) attitude, and where it comes from. Amelia's  
note that J "isn't meant for user input." crystallizes a big misgiving I 
have about J, even though I have been pro-J since J has been around.

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