Using the ? : syntax
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In NetRexx how is the following syntax used?
System.out.print(f.canRead() ? "r" : "-"); Because it returns: 5 +++ System.out.printf(f.canRead() > "r" : "-") +++ +++ Error: Unexpected character found in source ':' (hexadecimal encoding: 003A) Compilation of 'read.nrx' failed [one error] |
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I had a typo in my original code of an ">" but the "?" still returns the same error. I'd like to use this shortened syntax if it's available instead of using if/else.
# nrc read.nrx NetRexx portable processor 3.03 NetRexx '3.03', build 61-20140611-2330 Copyright (c) RexxLA, 2011,2014. All rights reserved. Parts Copyright (c) IBM Corporation, 1995,2008. Program read.nrx 5 +++ System.out.print(f.canRead() ? "r" : "-") +++ ^ +++ Error: Unexpected character found in source: '?' (hexadecimal encoding: 003F) Compilation of 'read.nrx' failed [one error] |
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Unless I missed something recently, NetRexx doesn't support the "ternary if" syntax. It's a C/Java affectation. A. On 13 November 2014 08:19, gpatrick <[hidden email]> wrote: I had a typo in my original code of an ">" but the "?" still returns the same Can't tweet, won't tweet!
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Alan
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In reply to this post by gpatrick
If you just need an expression to return a fixed set selection, there
are ways to code such things in NetRexx. For example: System.out.print("- r".word(1+f.canRead())) On 11/13/2014 8:19 AM, gpatrick wrote: > I had a typo in my original code of an ">" but the "?" still returns the same > error. I'd like to use this shortened syntax if it's available instead of > using if/else. > > # nrc read.nrx > NetRexx portable processor 3.03 NetRexx '3.03', build 61-20140611-2330 > Copyright (c) RexxLA, 2011,2014. All rights reserved. > Parts Copyright (c) IBM Corporation, 1995,2008. > Program read.nrx > 5 +++ System.out.print(f.canRead() ? "r" : "-") > +++ ^ > +++ Error: Unexpected character found in source: '?' (hexadecimal > encoding: 003F) > Compilation of 'read.nrx' failed [one error] > > > > > -- > View this message in context: http://ibm-netrexx.215625.n3.nabble.com/Using-the-syntax-tp4027326p4027327.html > Sent from the ibm-netrexx mailing list archive at Nabble.com. > > _______________________________________________ > Ibm-netrexx mailing list > [hidden email] > Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ > > > _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ |
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*I* did *never understand* why bmy beloved NetRexx didn't use the
*chance* to implement this nowadays so quite well know and used Syntax and Semantics of xxxxx ? aaa:bbb :-( :-( Maybe NetRexx 4.00 ?? Thomas. Anyway: All: Habve a nice weekend ;-) Thomas. ================================================================================= Am 14.11.2014 um 09:34 schrieb Kermit Kiser: > If you just need an expression to return a fixed set selection, there > are ways to code such things in NetRexx. For example: > > System.out.print("- r".word(1+f.canRead())) > > On 11/13/2014 8:19 AM, gpatrick wrote: >> I had a typo in my original code of an ">" but the "?" still returns >> the same >> error. I'd like to use this shortened syntax if it's available >> instead of >> using if/else. >> >> # nrc read.nrx >> NetRexx portable processor 3.03 NetRexx '3.03', build 61-20140611-2330 >> Copyright (c) RexxLA, 2011,2014. All rights reserved. >> Parts Copyright (c) IBM Corporation, 1995,2008. >> Program read.nrx >> 5 +++ System.out.print(f.canRead() ? "r" : "-") >> +++ ^ >> +++ Error: Unexpected character found in source: '?' (hexadecimal >> encoding: 003F) >> Compilation of 'read.nrx' failed [one error] >> >> >> >> >> -- >> View this message in context: >> http://ibm-netrexx.215625.n3.nabble.com/Using-the-syntax-tp4027326p4027327.html >> Sent from the ibm-netrexx mailing list archive at Nabble.com. >> >> _______________________________________________ >> Ibm-netrexx mailing list >> [hidden email] >> Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ >> >> >> > > _______________________________________________ > Ibm-netrexx mailing list > [hidden email] > Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ > -- ThSITC - The Simple IT keeps Changing www.thsitc.com www.db-123.com _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/
Thomas Schneider, Vienna, Austria (Europe) :-)
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Thomas, This is an example of an idiom, i.e. a construction whose meaning cannot be deduced from its symbols alone. It's a holdover from the antediluvian era when minimizing the number of characters typed was a major goal (perhaps because people typed on 110 baud Teletypes, and a 'good' typist was one who used two fingers); this is also the time when that pest the hard tab was born. "if then else" has more characters, but is not cryptic. I suspect people who love NetRexx are not in favor of more "features" of this sort. George -- Ludwig Mies van der Rohe On Sat, Nov 15, 2014 at 11:28 PM, Thomas Schneider <[hidden email]> wrote: *I* did *never understand* why bmy beloved NetRexx didn't use the *chance* to implement this nowadays -- "I don’t believe in the afterlife, although I am bringing a change of underwear." - W. Allen
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It's an idiom I've never got used to but
And the reason I never got used to it is because I spend the vast majority of programming hours with languages that don't have it, such as TSO REXX. Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Banking Center of Excellence, IBM +44-7802-245-584 email: [hidden email] Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker From: George Hovey <[hidden email]> To: IBM Netrexx <[hidden email]> Date: 16/11/2014 05:18 Subject: Re: [Ibm-netrexx] Using the ? : syntax Sent by: [hidden email] Thomas, This is an example of an idiom, i.e. a construction whose meaning cannot be deduced from its symbols alone. It's a holdover from the antediluvian era when minimizing the number of characters typed was a major goal (perhaps because people typed on 110 baud Teletypes, and a 'good' typist was one who used two fingers); this is also the time when that pest the hard tab was born. "if then else" has more characters, but is not cryptic. I suspect people who love NetRexx are not in favor of more "features" of this sort. George "Less is more." -- Ludwig Mies van der Rohe On Sat, Nov 15, 2014 at 11:28 PM, Thomas Schneider <Thomas.Schneider@...> wrote: *I* did *never understand* why bmy beloved NetRexx didn't use the *chance* to implement this nowadays so quite well know and used Syntax and Semantics of xxxxx ? aaa:bbb :-( :-( Maybe NetRexx 4.00 ?? Thomas. Anyway: All: Habve a nice weekend ;-) Thomas. ================================================================================= Am 14.11.2014 um 09:34 schrieb Kermit Kiser: If you just need an expression to return a fixed set selection, there are ways to code such things in NetRexx. For example: System.out.print("- r".word(1+f.canRead())) On 11/13/2014 8:19 AM, gpatrick wrote: I had a typo in my original code of an ">" but the "?" still returns the same error. I'd like to use this shortened syntax if it's available instead of using if/else. # nrc read.nrx NetRexx portable processor 3.03 NetRexx '3.03', build 61-20140611-2330 Copyright (c) RexxLA, 2011,2014. All rights reserved. Parts Copyright (c) IBM Corporation, 1995,2008. Program read.nrx 5 +++ System.out.print(f.canRead() ? "r" : "-") +++ ^ +++ Error: Unexpected character found in source: '?' (hexadecimal encoding: 003F) Compilation of 'read.nrx' failed [one error] -- View this message in context: http://ibm-netrexx.215625.n3.nabble.com/Using-the-syntax-tp4027326p4027327.html Sent from the ibm-netrexx mailing list archive at Nabble.com. _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ -- ThSITC - The Simple IT keeps Changing www.thsitc.com www.db-123.com _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ -- "I don’t believe in the afterlife, although I am bringing a change of underwear." - W. Allen _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ |
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In that Kermit has already provided an equally elegant and very definitely REXX style idiom to solve the specific problem at the start of this thread, I for one wouldn't want the language polluted by ideas dragged in from other languages. to see the results of that type of language design, take a look at perl. A. On 16 November 2014 01:48, Martin Packer <[hidden email]> wrote: It's an idiom I've never got used to but Can't tweet, won't tweet!
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Alan
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In reply to this post by Martin Packer
It's for sure *easier to master and recognize* than the usage of the
ampersand (&) as an *exclusive OR* in RexxY Languages ;-) ;-)
;-)
============================================================================================================= Am 16.11.2014 um 10:48 schrieb Martin
Packer:
It's an idiom I've never got used to but _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/
Thomas Schneider, Vienna, Austria (Europe) :-)
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