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Obscure programming language question |
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monkeyson2 (16:07 13/11/2007)
Phlamethrower (16:11 13/11/2007)
alban (18:08 9/12/2007)
glavallin (15:13 25/2/2013)
MEmerton (09:50 28/2/2013)
Stoppers (07:51 15/11/2007)
Loris (14:22 19/11/2007)
nunfetishist (20:29 20/11/2007)
VincceH (21:21 20/11/2007)
nunfetishist (15:49 21/11/2007)
Loris (10:26 5/12/2007)
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Phil Mellor |
Message #105246, posted by monkeyson2 at 16:07, 13/11/2007 |
 Please don't let them make me be a monkey butler
Posts: 12380
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I'm sure I remember reading about an odd feature of some programming language where you could write:
3 = x;
The constant 3 would be redefined as the current value of x.
Has anyone else heard of this or am I going nuts? |
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Jeffrey Lee |
Message #105248, posted by Phlamethrower at 16:11, 13/11/2007, in reply to message #105246 |
 Hot Hot Hot Hot Hot Hot Hot Hot Hot Hot Hot Hot Hot stuff
Posts: 15100
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I think FORTH has an odd system like that where you can redefine stuff to be almost anything. But I can't be bothered checking while I'm at work  |
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Simon Willcocks |
Message #105274, posted by Stoppers at 07:51, 15/11/2007, in reply to message #105246 |
Member
Posts: 302
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Another possibility would be smalltalk, where everything is an object, even classes. I've never used it, though, so there's a very good chance I'm wrong! |
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Tony Haines |
Message #105325, posted by Loris at 14:22, 19/11/2007, in reply to message #105246 |
 Ha ha, me mine, mwahahahaha
Posts: 1025
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How would that work?
PI=3 
X=2.5
3=X
2=4*3
Y=1+1
PRINT Y {reports 10?)
how would that apply to digits?
2=1
3=1
4=1
5=1
6=1
7=1
...
PRINT 234 {111?}
or how about
1=2
2=3
3=4
4=5
PRINT 1 {5, presumably?) |
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Rob Kendrick |
Message #105354, posted by nunfetishist at 20:29, 20/11/2007, in reply to message #105246 |
 Today's phish is trout a la creme.
Posts: 525
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Some instances of FORTRAN allow you to do this. (Specifically, ones that aren't compiled.)
C, alas, forbids such excitement as #define 4 5 |
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VinceH |
Message #105355, posted by VincceH at 21:21, 20/11/2007, in reply to message #105354 |
 Lowering the tone since the dawn of time
Posts: 1600
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C, alas, forbids such excitement as #define 4 5 Personally, I think what C does isn't forbid such excitement, but forbids such excrement. I can honestly see no sensible use for such things except as a method of obfuscation, and a route to code which is difficult to maintain. |
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Rob Kendrick |
Message #105369, posted by nunfetishist at 15:49, 21/11/2007, in reply to message #105355 |
Today's phish is trout a la creme.
Posts: 525
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What other purpose might it have? |
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Tony Haines |
Message #105568, posted by Loris at 10:26, 5/12/2007, in reply to message #105369 |
Ha ha, me mine, mwahahahaha
Posts: 1025
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What other purpose might it have? Make it easier to compute a circumference? 
Some sort of high-speed exception/interrupt handling? |
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alban |
Message #105608, posted by alban at 18:08, 9/12/2007, in reply to message #105248 |
Member
Posts: 2
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You can certainly do this in WimpForth
: 3 6 ; ( redefine 3 as 6 )
3 2 + . 8 ok
I am not sure why you would want to do this though |
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Geoff Lavallin |
Message #121952, posted by glavallin at 15:13, 25/2/2013, in reply to message #105608 |
Member
Posts: 44
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You can certainly do this in WimpForth
: 3 6 ; ( redefine 3 as 6 )
3 2 + . 8 ok
I am not sure why you would want to do this though Looked for Iyonix version (2007) on
http://www.leginda.com but could not find it.
Is there an alternative address? |
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Michael Emerton |
Message #121955, posted by MEmerton at 09:50, 28/2/2013, in reply to message #121952 |
Member
Posts: 75
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I would be very interested in this, as my Dad programmed in Forth for many years from BBC to Archimedies to A7000+
It always seemed an easy language, with odd quirks (if you could get the hang of reverse polish notation: http://en.wikipedia.org/wiki/Reverse_Polish_notation |
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