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Groups > comp.lang.java.programmer > #37479
| From | j4n bur53 <janburse@fastmail.fm> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: underscore as keyword in Java 9 |
| Date | 2017-09-26 13:37 +0200 |
| Organization | albasani.net |
| Message-ID | <oqde5c$3t1$1@news.albasani.net> (permalink) |
| References | <slrnoscj1i.ijn.avl@logic.at> <oq635r$alr$1@news.albasani.net> <0b855e3b-6966-4f3b-bfdb-0863c64d7e39@googlegroups.com> <59c97591$0$2072$e4fe514c@newszilla.xs4all.nl> <oqc6om$19to$2@gioia.aioe.org> |
Ok, thats interesting, shorthand for lambda expressions. Oki Doki. There is no end to learning... Arne Vajhøj schrieb: > On 9/25/2017 5:30 PM, Silvio wrote: >> I do like what Scala also does with the _ identifier (it also uses it >> as throw-out identifier). In Scala >> >> _ + 1 >> >> is shorthand for >> >> x_1001 => x_1001 + 1 >> >> and >> >> _.toLowerCase >> >> is shorthand for >> >> x_1002 => x_1002.toLowerCase >> >> and Scala goes even further. It defines >> >> _ * _ >> >> to be a shorthand for >> >> (x_1003,x_1004) => x_1003 * x_1004 >> >> This allows for expressions like >> >> x.filter(_.length > 1).map(_.toInt).reduce(_ + _) >> >> which is far more concise and readable than >> >> x.filter(a => a.length > 1).map(b => b.toInt).reduce((c,d) => c + d) > > It is definitely shorter. > > I am not as convinced about more readable. > > Arne
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underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-23 11:58 +0000
Re: underscore as keyword in Java 9 j4n bur53 <janburse@fastmail.fm> - 2017-09-23 18:46 +0200
Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-23 21:01 -0400
Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-24 11:25 +0000
Re: underscore as keyword in Java 9 j4n bur53 <janburse@fastmail.fm> - 2017-09-24 17:30 +0200
Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-24 18:24 -0400
Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-24 23:27 +0000
Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-24 21:10 -0400
Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-25 13:30 +0000
Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-25 08:07 -0700
Re: underscore as keyword in Java 9 lewbloch@gmail.com - 2017-09-25 13:21 -0700
Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-25 23:30 +0200
Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-25 20:24 -0400
Re: underscore as keyword in Java 9 j4n bur53 <janburse@fastmail.fm> - 2017-09-26 13:37 +0200
Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 19:05 +0200
Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-27 10:25 -0700
Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 23:02 +0200
Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-27 20:02 -0400
Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-28 05:11 -0700
Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-28 20:42 -0400
Re: underscore as keyword in Java 9 Sebastian <nowhere@nirvana.org> - 2017-09-27 20:26 +0200
Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 23:10 +0200
Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-26 08:29 +0000
Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 19:08 +0200
Re: underscore as keyword in Java 9 Sebastian <nowhere@nirvana.org> - 2017-09-27 21:46 +0200
Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-27 06:53 -0700
Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-27 15:59 +0000
Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-27 19:18 -0400
Re: underscore as keyword in Java 9 Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-28 11:41 +0200
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