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Re: Holy boop: goto for Java

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On 12-06-04 01:17 AM, Lew wrote:
> markspace wrote:
>> Daniel Pitts wrote:
>>> Check the date of that article before getting to excited/disappointed
>>> ;-)
>>
>> Ah. Somebody got me good, I think.
>
> In a highly limited, controlled and presumably
> blessed-for-object-oriented way, Java does have a version of "goto", in
> its 'break' and 'continue' statements. You can't just jump anywhere, but
> you can jump to labels, with restrictions.
>
> I have never seen a use of Java's labeled 'break' or 'continue' outside
> of tutorials and examples, though.
>
> The full, unbridled "goto" doesn't exist in Java except for the keyword
> 'goto', whose head is mounted on a pike at the language's gates as a
> warning.
>
I use labeled break/continue occasionally. I see a lot of advice on 
programming forums like StackOverflow that says never use them. Typical 
dogmatic advice is that you should extract inner-loop code into methods 
and use boolean return codes to make a top-level break/continue decision.

What amazes me is that these individuals support this religious stance 
by arguing that it improves readability, when producing little auxiliary 
methods usually does anything but.

The combination of conditions that would indicate a labeled 
break/continue is clear:

1. A loop;
2. A condition in that loop that could lead to a break or continue for it;
3. That condition is itself a loop. Furthermore, the logic in the loop 
is probably coupled to the logic in the rest of the main loop.

To the degree that the logic in that inner loop makes (no) sense as a 
standalone method - size, understandability on its own etc - is the 
decision process I follow as to whether a labeled break/continue is 
advisable.

In any case, Lew, I don't see that this has much to do with "blessed for 
OO". We're talking imperative coding here, which is what Java 
programmers spend the majority of their time doing.

AHS
-- 
Never interrupt your enemy when he is making a mistake.
--Napoleon

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Holy boop: goto for Java markspace <-@.> - 2012-06-03 19:36 -0700
  Re: Holy boop: goto for Java Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-03 20:03 -0700
    Re: Holy boop: goto for Java markspace <-@.> - 2012-06-03 20:30 -0700
      Re: Holy boop: goto for Java Lew <noone@lewscanon.com> - 2012-06-03 21:17 -0700
        Re: Holy boop: goto for Java Robert Klemme <shortcutter@googlemail.com> - 2012-06-04 07:56 +0200
        Re: Holy boop: goto for Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-06-04 04:28 -0300
          Re: Holy boop: goto for Java Robert Klemme <shortcutter@googlemail.com> - 2012-06-04 00:37 -0700
            Re: Holy boop: goto for Java Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-04 07:43 -0700
              Re: Holy boop: goto for Java "Mike Schilling" <mscottschilling@hotmail.com> - 2012-06-04 07:47 -0700
                Re: Holy boop: goto for Java "Mike Schilling" <mscottschilling@hotmail.com> - 2012-06-04 08:17 -0700
            Re: Holy boop: goto for Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-06-04 17:07 -0300
              Re: Holy boop: goto for Java Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-04 13:17 -0700
                Re: Holy boop: goto for Java Gene Wirchenko <genew@ocis.net> - 2012-06-04 14:46 -0700
                Re: Holy boop: goto for Java Robert Klemme <shortcutter@googlemail.com> - 2012-06-05 07:31 +0200
                Re: Holy boop: goto for Java Gene Wirchenko <genew@ocis.net> - 2012-06-05 09:15 -0700
                Re: Holy boop: goto for Java Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-05 10:51 -0700
                Re: Holy boop: goto for Java Gene Wirchenko <genew@ocis.net> - 2012-06-05 10:54 -0700
                Re: Holy boop: goto for Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-06-06 05:58 -0300
                Re: Holy boop: goto for Java Lew <lewbloch@gmail.com> - 2012-06-06 12:11 -0700
                Re: Holy boop: goto for Java Robert Klemme <shortcutter@googlemail.com> - 2012-06-05 23:24 +0200
                Re: Holy boop: goto for Java Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-05 17:30 -0400
                Re: Holy boop: goto for Java Gene Wirchenko <genew@ocis.net> - 2012-06-05 20:06 -0700
            Re: Holy boop: goto for Java Patricia Shanahan <pats@acm.org> - 2012-07-22 06:37 -0700
              Re: Holy boop: goto for Java Chris Riesbeck <Chris.Riesbeck@gmail.com> - 2012-07-23 13:27 -0500
                Re: Holy boop: goto for Java Gene Wirchenko <genew@ocis.net> - 2012-07-23 13:23 -0700
          Re: Holy boop: goto for Java Lew <lewbloch@gmail.com> - 2012-06-04 09:33 -0700
        Re: Holy boop: goto for Java Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-06-04 07:26 -0400
        Re: Holy boop: goto for Java "Mike Schilling" <mscottschilling@hotmail.com> - 2012-06-04 07:44 -0700
          Re: Holy boop: goto for Java Robert Klemme <shortcutter@googlemail.com> - 2012-06-04 18:13 +0200
            Re: Holy boop: goto for Java Gene Wirchenko <genew@ocis.net> - 2012-06-04 10:23 -0700
              Re: Holy boop: goto for Java Lew <lewbloch@gmail.com> - 2012-06-04 10:45 -0700
                Re: Holy boop: goto for Java Robert Klemme <shortcutter@googlemail.com> - 2012-06-04 20:31 +0200
                Re: Holy boop: goto for Java Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-04 11:52 -0700
                Re: Holy boop: goto for Java Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-06-04 14:15 -0500
                Re: Holy boop: goto for Java Lew <lewbloch@gmail.com> - 2012-06-04 14:52 -0700
          Re: Holy boop: goto for Java Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-04 10:50 -0700
          Re: Holy boop: goto for Java Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-04 10:56 -0700
          Re: Holy boop: goto for Java Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-06-04 13:05 -0500
    Re: Holy boop: goto for Java Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-06-04 07:28 -0400
  Re: Holy boop: goto for Java Roedy Green <see_website@mindprod.com.invalid> - 2012-06-03 22:10 -0700

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