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Re: are lambdas a way to bring functional programming to java?

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In article <53ae0af4$0$302$14726298@news.sunsite.dk>, Arne Vajhøj 
(arne@vajhoej.dk) says...

> Here is a simple example.
> 
> Java 7 code:
> 
> Collections.sort(lst, new Comparator<String>() {
>      public int compare(String s1, String s2) {
>          return s1.length() - s2.length();
>      }
> });
> 
> Java 8 code:
> 
> Collections.sort(lst, (s1,s2) -> s1.length() - s2.length());
> 
> I do not see any value in the extra code in the 7 version.

I fear Java8's Lambdas may not encourage reuse so much as the Java 7 
way. This does seem to be a pretty standard comparator, so I would 
probably code it this way:

static final Comparator<String> COMPARE_BY_LENGTH = new Comparator<>{
      public int compare(String s1, String s2) {
          return s1.length() - s2.length();
      }
 });

Collections.sort(lst, COMPARE_BY_LENGTH);

Just because using it looks better.
Of course in Java 8 it could look like this (sorry for the bad line 
breaks:

static final Comparator<String> COMPARE_BY_LENGTH 
              = (s1,s2) -> s1.length() - s2.length()

Collections.sort(lst, COMPARE_BY_LENGTH);

..or even implementing a more general interface.
But would people do that very often, if the original expression is so 
concise? Hmm..

Kind regards,
Wanja

-- 
..Alesi's problem was that the back of the car was jumping up and down 
dangerously - and I can assure you from having been teammate to 
Jean Alesi and knowing what kind of cars that he can pull up with, 
when Jean Alesi says that a car is dangerous - it is. [Jonathan Palmer]

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Thread

are lambdas a way to bring functional programming to java? gdotone@gmail.com - 2014-06-27 16:50 -0700
  Re: are lambdas a way to bring functional programming to java? Arne Vajhøj <arne@vajhoej.dk> - 2014-06-27 20:14 -0400
    Re: are lambdas a way to bring functional programming to java? Arne Vajhøj <arne@vajhoej.dk> - 2014-06-27 20:23 -0400
      Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-06-28 14:43 +0200
        Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-07-01 14:34 -0700
          Re: are lambdas a way to bring functional programming to java? Arne Vajhøj <arne@vajhoej.dk> - 2014-07-01 22:01 -0400
          Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-07-02 20:52 +0200
            Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-07-02 13:08 -0700
              Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-07-03 03:13 +0200
              Re: are lambdas a way to bring functional programming to java? Joerg Meier <joergmmeier@arcor.de> - 2014-07-06 14:42 +0200
        Re: are lambdas a way to bring functional programming to java? Arne Vajhøj <arne@vajhoej.dk> - 2014-07-01 22:27 -0400
          Re: are lambdas a way to bring functional programming to java? Arne Vajhøj <arne@vajhoej.dk> - 2014-07-01 22:32 -0400
            Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-07-01 19:58 -0700
            Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-07-02 22:55 +0200
              Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-07-02 15:32 -0700
                Re: are lambdas a way to bring functional programming to java? Gene Wirchenko <genew@telus.net> - 2014-07-03 09:45 -0700
          Re: are lambdas a way to bring functional programming to java? leif.roar@invalid.com (Leif Roar Moldskred) - 2014-07-01 23:48 -0500
            Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-07-02 22:55 +0200
              Re: are lambdas a way to bring functional programming to java? Gene Wirchenko <genew@telus.net> - 2014-07-03 09:49 -0700
                Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-07-03 10:25 -0700
                Re: are lambdas a way to bring functional programming to java? Gene Wirchenko <genew@telus.net> - 2014-07-04 11:03 -0700
          Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-07-02 21:23 +0200
      Re: are lambdas a way to bring functional programming to java? Roedy Green <see_website@mindprod.com.invalid> - 2014-06-30 09:08 -0700
        Re: are lambdas a way to bring functional programming to java? Arne Vajhøj <arne@vajhoej.dk> - 2014-07-01 21:56 -0400
  Re: are lambdas a way to bring functional programming to java? Joerg Meier <joergmmeier@arcor.de> - 2014-06-28 12:11 +0200
    Re: are lambdas a way to bring functional programming to java? Roedy Green <see_website@mindprod.com.invalid> - 2014-06-30 08:50 -0700
      Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-06-30 09:09 -0700
      Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-07-01 19:27 +0200
        Re: are lambdas a way to bring functional programming to java? Wanja Gayk <brixomatic@yahoo.com> - 2014-07-01 20:46 +0200
          Re: are lambdas a way to bring functional programming to java? Sebastian <news@seyweiler.dyndns.org> - 2014-07-01 21:52 +0200
            Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-07-01 14:11 -0700
              Re: are lambdas a way to bring functional programming to java? Jan Burse <janburse@fastmail.fm> - 2014-07-22 14:37 +0200
                Re: are lambdas a way to bring functional programming to java? markspace <markspace@nospam.nospam> - 2014-07-22 10:39 -0700
                Sidetrack on generics (WAS: Re: are lambdas a way to bring functional programming to java?) Daniele Futtorovic <da.futt.news@laposte.net> - 2014-07-22 20:48 +0200
                Re: Sidetrack on generics (WAS: Re: are lambdas a way to bring functional   programming to java?) Chris Riesbeck <Chris.Riesbeck@gmail.com> - 2014-07-23 12:01 -0500
      Re: are lambdas a way to bring functional programming to java? Arne Vajhøj <arne@vajhoej.dk> - 2014-07-01 21:50 -0400
  Re: are lambdas a way to bring functional programming to java? Roedy Green <see_website@mindprod.com.invalid> - 2014-07-22 04:40 -0700
  Re: are lambdas a way to bring functional programming to java? Roedy Green <see_website@mindprod.com.invalid> - 2014-07-28 09:45 -0700

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