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CAS command question
01-04-2017, 02:53 PM
Post: #13
RE: CAS command question
(01-04-2017 12:56 PM)compsystems Wrote:  for DrD
If you enter the expression in quotation marks, the LEFT or RIGHT command works as it should ...

"Quotation marks" is ambiguous: there are single and double quotation marks. Each has it's object type, and means of handling. My example used string objects, (double quotes). However, as Arno K described, "left is left, and right is right."

left('x+y<4'); ==> x+y
left(CAS("x+y<4")); ==> 4

Referring back to my original post:

Un-intuitively, for a program, given a (perhaps random) list of expressions, those with a "<" inequality would need an exception handler. Requiring the list to be in a specific format is not user friendly. Real world expressions are unlikely to use single quotes, and further requiring them to be re-written in the specific inequality representation where the left side is always > than right side is just not practical.

Then there is the definition of the term "left" and "right," fundamentally. The similar command in Texas Instruments TI-Basic, as described here: http://tibasicdev.wikidot.com/68k:left seems better designed

Yes, Parisse explained the why of it, but as for "intuitively," I'm not so sure. What do you think?
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Messages In This Thread
CAS command question - DrD - 01-02-2017, 06:44 PM
RE: CAS command question - Arno K - 01-02-2017, 09:55 PM
RE: CAS command question - parisse - 01-03-2017, 07:24 AM
RE: CAS command question - DrD - 01-03-2017, 11:33 AM
RE: CAS command question - Han - 01-04-2017, 03:06 PM
RE: CAS command question - DrD - 01-04-2017, 03:46 PM
RE: CAS command question - Han - 01-04-2017, 04:01 PM
RE: CAS command question - DrD - 01-04-2017, 08:37 PM
RE: CAS command question - Han - 01-05-2017, 02:07 AM
RE: CAS command question - matthiaspaul - 01-03-2017, 10:54 PM
RE: CAS command question - compsystems - 01-04-2017, 03:23 AM
RE: CAS command question - John P - 01-04-2017, 11:09 PM
RE: CAS command question - Arno K - 01-03-2017, 08:09 AM
RE: CAS command question - parisse - 01-03-2017, 04:42 PM
RE: CAS command question - parisse - 01-04-2017, 07:07 AM
RE: CAS command question - DrD - 01-04-2017, 11:19 AM
RE: CAS command question - Han - 01-04-2017, 02:46 PM
RE: CAS command question - compsystems - 01-04-2017, 12:56 PM
RE: CAS command question - DrD - 01-04-2017 02:53 PM
RE: CAS command question - Han - 01-04-2017, 03:51 PM
RE: CAS command question - DrD - 01-04-2017, 03:32 PM
RE: CAS command question - compsystems - 01-04-2017, 05:08 PM
RE: CAS command question - parisse - 01-04-2017, 08:25 PM
RE: CAS command question - Arno K - 01-04-2017, 11:56 PM
RE: CAS command question - parisse - 01-05-2017, 07:46 AM
RE: CAS command question - Arno K - 01-05-2017, 08:54 AM
RE: CAS command question - DrD - 01-05-2017, 11:38 AM
RE: CAS command question - compsystems - 01-05-2017, 12:46 PM
RE: CAS command question - DrD - 01-05-2017, 02:28 PM
RE: CAS command question - Han - 01-05-2017, 04:49 PM
RE: CAS command question - DrD - 01-06-2017, 05:59 PM
RE: CAS command question - Han - 01-06-2017, 08:11 PM
RE: CAS command question - parisse - 01-05-2017, 07:31 PM
RE: CAS command question - compsystems - 01-05-2017, 08:08 PM
RE: CAS command question - Han - 01-05-2017, 09:07 PM
RE: CAS command question - Han - 01-05-2017, 09:20 PM
RE: CAS command question - Alberto Candel - 01-05-2017, 10:02 PM
RE: CAS command question - compsystems - 01-05-2017, 10:46 PM
RE: CAS command question - Alberto Candel - 01-05-2017, 11:05 PM
RE: CAS command question - Han - 01-05-2017, 11:53 PM
RE: CAS command question - chromos - 01-06-2017, 06:57 PM
RE: CAS command question - DrD - 01-06-2017, 08:28 PM
RE: CAS command question - Han - 01-06-2017, 08:37 PM
RE: CAS command question - John P - 01-08-2017, 11:15 PM
RE: CAS command question - parisse - 01-07-2017, 07:52 AM
RE: CAS command question - compsystems - 01-06-2017, 06:59 PM
RE: CAS command question - Han - 01-06-2017, 08:27 PM
RE: CAS command question - compsystems - 01-06-2017, 08:46 PM
RE: CAS command question - DrD - 01-07-2017, 11:25 AM
RE: CAS command question - parisse - 01-07-2017, 08:15 PM
RE: CAS command question - DrD - 01-07-2017, 10:54 PM
RE: CAS command question - DrD - 01-08-2017, 05:27 PM
RE: CAS command question - parisse - 01-09-2017, 06:43 AM
RE: - compsystems - 01-07-2017, 01:02 PM
RE: CAS command question - Dirk.nl - 01-07-2017, 09:32 PM
RE: CAS command question - parisse - 01-08-2017, 07:11 AM
RE: CAS command question - DrD - 01-08-2017, 09:47 AM
RE: CAS command question - compsystems - 01-08-2017, 04:17 PM
RE: CAS command question - DrD - 01-08-2017, 08:26 PM
RE: CAS command question - compsystems - 01-08-2017, 06:48 PM
RE: CAS command question - parisse - 01-09-2017, 04:43 PM
RE: CAS command question - DrD - 01-09-2017, 06:09 PM
RE: CAS command question - parisse - 01-09-2017, 06:58 PM
RE: CAS command question - Han - 01-09-2017, 07:29 PM
RE: CAS command question - DrD - 01-09-2017, 10:57 PM
RE: CAS command question - Han - 01-10-2017, 05:44 AM
RE: CAS command question - parisse - 01-10-2017, 07:58 AM
RE: CAS command question - DrD - 01-10-2017, 10:53 AM
RE: CAS command question - Han - 01-10-2017, 03:33 PM
RE: CAS command question - parisse - 01-10-2017, 06:58 PM
RE: CAS command question - Han - 01-10-2017, 09:14 PM
RE: CAS command question - compsystems - 01-10-2017, 08:26 PM
RE: CAS command question - parisse - 01-11-2017, 06:46 AM
RE: CAS command question - DrD - 01-11-2017, 02:18 PM
RE: CAS command question - Han - 01-11-2017, 08:19 PM
RE: CAS command question - parisse - 01-11-2017, 05:40 PM
RE: CAS command question - DrD - 01-12-2017, 11:14 AM
RE: CAS command question - Arno K - 01-12-2017, 12:44 PM
RE: CAS command question - parisse - 01-12-2017, 07:29 PM
RE: CAS command question - DrD - 01-12-2017, 08:44 PM
RE: CAS command question - Arno K - 01-12-2017, 10:11 PM
RE: CAS command question - parisse - 01-13-2017, 06:54 AM
RE: CAS command question - DrD - 01-13-2017, 10:52 AM
RE: CAS command question - Han - 01-13-2017, 03:12 PM
RE: CAS command question - DrD - 01-13-2017, 04:47 PM
RE: CAS command question - parisse - 01-13-2017, 09:18 PM
RE: CAS command question - DrD - 01-13-2017, 10:36 PM
RE: CAS command question - parisse - 01-14-2017, 06:44 AM
RE: CAS command question - compsystems - 01-14-2017, 02:40 AM
RE: CAS command question - DrD - 01-14-2017, 11:36 AM
RE: CAS command question - parisse - 01-14-2017, 12:25 PM
RE: CAS command question - compsystems - 01-14-2017, 01:05 PM
RE: CAS command question - DrD - 01-14-2017, 02:20 PM
RE: CAS command question - parisse - 01-14-2017, 07:27 PM
RE: CAS command question - DrD - 01-14-2017, 02:11 PM
RE: CAS command question - Dirk.nl - 01-14-2017, 02:46 PM
RE: CAS command question - Mark Hardman - 01-14-2017, 02:58 PM
RE: CAS command question - John P - 01-14-2017, 03:11 PM
RE: CAS command question - DrD - 01-14-2017, 03:17 PM
RE: CAS command question - Dirk.nl - 01-14-2017, 03:27 PM
RE: CAS command question - DrD - 01-15-2017, 09:30 AM
RE: CAS command question - compsystems - 01-14-2017, 03:31 PM
RE: CAS command question - compsystems - 01-15-2017, 01:28 AM



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