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- Newsgroups: comp.lang.apl
- Path: sparky!uunet!ukma!darwin.sura.net!spool.mu.edu!torn!nott!uotcsi2!news
- From: cbbrowne@csi.uottawa.ca (Christopher Browne)
- Subject: Re: J is NOT APL (was Re: Interpreter advice sought.)
- Message-ID: <1993Jan28.194511.20795@csi.uottawa.ca>
- Sender: news@csi.uottawa.ca
- Nntp-Posting-Host: prgf
- Organization: Dept. of Computer Science, University of Ottawa
- References: <1993Jan25.144021.22129@csi.uottawa.ca> <C1K1GK.39q@quadsys.com>
- Date: Thu, 28 Jan 93 19:45:11 GMT
- Lines: 67
-
- In article <C1K1GK.39q@quadsys.com> roland@quadsys.com (Roland Besserer) writes:
- >cbbrowne@csi.uottawa.ca (Christopher Browne) writes:
- >: It appears that you're implying that it is relatively unimportant
- >: whether or not source code can be made portable. Much of the REST of
- >: the world thinks that portability is HIGHLY important.
- >:
- >
- >The ability to upload/view program sources with a standard text edit
- >is unrelated to the issue of portability. Portability simply means the
- >existance of a functional and syntactic standard available and adhered
- >to on diverse hardware/software environments. If current communications
- >software imposses restrictions on the transmission and viewing of program
- >sources utilizing anything more than 7-bit ASCII, there is always the
- >simply solution to use an encoding scheme, transfer the code in question
- >and decode it. Yes, this apporach is inconvenient, but it should bot
- >be a constraint in the design of a language.
-
- a) The use of "standardized tools" to work with programs IS a
- portability issue. The same argument has been going on on
- Comp.lang.forth, where people have been arguing very similar things.
-
- b) There's ALWAYS constraints on the design of a language. Otherwise,
- nobody actually gets around to nailing features down.
-
- c) The problem is not merely in communications, it's also in editing
- and printing. This has definitely been a problem with APL in the
- past. As windowed GUI systems with customizable font systems grow in
- popularity, it MAY become less of a problem, but that's not obvious.
-
- >: On the other hand, J allows one to apply power similar to that of APL
- >: in virtually any environment, whether it has "funny characters" or
- >: not. Moreover, it allows you to make applications portable.
- >:
- >
- >Portability is never really a problem with an infant language. Should
- >J proliferate it will face the same portability problems as any other
- >language.
-
- It's good not to shackle it to hardware-related portability problems
- at stage 1. In addition, if it's NOT reasonably portable, it may not
- survive infancy. If it didn't run on a fairly large number of
- different systems, I don't think it would be possible for it to
- "proliferate."
-
- >: Yes, it tends to look like "line noise". So does APL, to the
- >: uninitiated.
- >
- >Here I most strongly disagree with you. APLs character set and nomenclature
- >are easily recognizable as they are based on mathimatical symbolism
- >familiar to most of us. J simply overloads ASCII punctuation characters.
-
- I said "to the uninitiated." Most people that see it for the first
- time DO think it looks strange. The fact that APL uses a different
- order of operations than people are used to is also confusing.
- Right-to-left evaluation isn't "normal." The fact that HP calculators
- and the Forth language uses RPN is similarly "odd," and throws people
- off, at the start.
-
- It isn't difficult to remove the overloading from J using a suitable
- set of redefinitions; it's difficult NOT to at least START with an
- "overload" when J is trying to function under ASCII.
-
- --
- Christopher Browne | PGP 2.0 key available
- cbbrowne@csi.uottawa.ca |======================================
- University of Ottawa | Genius may have its limitations, but
- Master of System Science Program | stupidity is not thus handicapped.
-