I blame the state of debuggers more so than lambdas. I've yet to see a Java
debugger that can properly handle any sort of fluent DSL, and lambdas make
fluent DSLs far more common now.
On 29 January 2017 at 20:45, Rob Tompkins <chtom...@gmail.com> wrote:
>
>
> > On Jan 29, 2017, at 9:24 PM, Gary Gregory <garydgreg...@gmail.com>
> wrote:
> >
> > I know someone would reply with some Java 8 lamba... but that will never
> be
> > as easy to ready as a method name like isEmpty or hasSomething...
> >
>
> At my day job a bunch of folks got giddy over the new java 8 functionality
> and ended up writing a ton of unreadable non-debugable code. So, I
> definitely agree with this sentiment.
>
> -Rob
>
>
> > Gary
> >
> >> On Sat, Jan 28, 2017 at 2:33 PM, Matt Benson <gudnabr...@gmail.com>
> wrote:
> >>
> >> Like Bene, this feels a little off to me. Just for argument's sake,
> let's
> >> look at:
> >>
> >> Optional.ofNullable(foo).map(Object::toString).filter(
> >> StringUtils::isNotBlank).isPresent();
> >>
> >> Assuming you're on Java 8, of course. It's a bit long, but not horrible.
> >> What about, in a Java 8-compatible version of [lang], an
> >> Optionals/OptionalUtils class?
> >>
> >> public class OptionalUtils {
> >>
> >> public static Optional<String> toString(Object o) {
> >> return map(o, Object::toString);
> >> }
> >>
> >> static <T, R> Optional<R> map(T t, Function<? super T, ? extends R>
> fn) {
> >> return Optional.ofNullable(t).map(fn);
> >> }
> >> }
> >>
> >> Then your test could be shortened to:
> >>
> >> OptionalUtils.toString(foo).filter(StringUtils::
> isNotBlank).isPresent();
> >>
> >> Just thinking "out loud",
> >> Matt
> >>
> >> On Sat, Jan 28, 2017 at 11:08 AM, Gary Gregory <garydgreg...@gmail.com>
> >> wrote:
> >>
> >>> If you look at the link Matt provided, that handles arrays and
> >> collection,
> >>> but not Object.toString()
> >>>
> >>> Gary
> >>>
> >>> On Jan 28, 2017 1:13 AM, "Benedikt Ritter" <brit...@apache.org> wrote:
> >>>
> >>>
> >>>> Am 28.01.2017 um 02:53 schrieb Gary Gregory <garydgreg...@gmail.com>:
> >>>>
> >>>> The simplest examples I have on hand are instances of Path and URI
> >> which
> >>>> can be built with an empty string. I want to know if these are
> "empty".
> >>> For
> >>>> the app I am now on for example, a Path or null and "" should be
> >> treated
> >>>> the same. Same for a URI.
> >>>
> >>> I don’t think it is a good idea to define emptiness based on the return
> >>> value of Object.toString(). Consider the following:
> >>>
> >>> isEmpty(null) -> true
> >>> isEmpty(„“) -> true
> >>> isEmpty(new URI(„“)) -> true
> >>>
> >>> But:
> >>>
> >>> isEmpty(Collections.emptyList()) -> false
> >>> isEmpty(new int[0]) -> false
> >>>
> >>> This is because toString() has nothing to do with emptiness. For this
> >>> reason I think it would be better to have explicitly typed method
> >> overloads
> >>> for the use cases you’re thinking about:
> >>>
> >>> boolean isEmpty(Path)
> >>> boolean isEmpty(URI)
> >>>
> >>> I’m not sure whether this belong to [lang]. The first looks like it
> >> belongs
> >>> to [io] while the second would better fit into [net]…
> >>>
> >>> Benedikt
> >>>
> >>>>
> >>>> Gary
> >>>>
> >>>>> On Fri, Jan 27, 2017 at 5:37 PM, Matt Sicker <boa...@gmail.com>
> wrote:
> >>>>>
> >>>>> That's an interesting use case, though I've never come across a
> >>> toString()
> >>>>> implementation that would be affected. Can you go into more detail?
> >>>>>
> >>>>> On 27 January 2017 at 16:04, Gary Gregory <garydgreg...@gmail.com>
> >>> wrote:
> >>>>>
> >>>>>> _Like_ that except that our Log4j version does not do the case I
> >> want:
> >>>>>> object.toString().
> >>>>>>
> >>>>>> Gary
> >>>>>>
> >>>>>> On Fri, Jan 27, 2017 at 1:58 PM, Matt Sicker <boa...@gmail.com>
> >> wrote:
> >>>>>>
> >>>>>>> Something like this?
> >>>>>>>
> >>>>>>> https://github.com/apache/logging-log4j2/blob/master/
> >>>>>>> log4j-core/src/main/java/org/apache/logging/log4j/core/
> >>>>>>> util/Assert.java#L43
> >>>>>>>
> >>>>>>> On 27 January 2017 at 15:54, Gary Gregory <garydgreg...@gmail.com>
> >>>>>> wrote:
> >>>>>>>
> >>>>>>>> Hi All,
> >>>>>>>>
> >>>>>>>> There are certain kinds of objects, _descriptor_ kind of objects
> >> that
> >>>>>>> would
> >>>>>>>> benefit from isEmpty semantics. These kind of objects can describe
> >>>>>>> complex
> >>>>>>>> command line arguments and other kind of configuration objects.
> >>>>>>>>
> >>>>>>>> I'd like to add with this pseudo code:
> >>>>>>>>
> >>>>>>>> boolean isEmpty(Object) {
> >>>>>>>> return object == null ? true : isEmpty(object.toString());
> >>>>>>>> }
> >>>>>>>>
> >>>>>>>> Thoughts?
> >>>>>>>>
> >>>>>>>> Same idea of isBlank(), isNotEmpty() and so on.
> >>>>>>>>
> >>>>>>>> Gary
> >>>>>>>>
> >>>>>>>> --
> >>>>>>>> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
> >>>>>>>> Java Persistence with Hibernate, Second Edition
> >>>>>>>> <https://www.amazon.com/gp/product/1617290459/ref=as_li_
> >>>>>>>> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1617290459&
> >>>>>>>> linkCode=as2&tag=garygregory-20&linkId=
> >>>>> cadb800f39946ec62ea2b1af9fe6a2
> >>>>>> b8>
> >>>>>>>>
> >>>>>>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=
> >>>>> garygregory-20&l=am2&o=1&a=
> >>>>>>>> 1617290459>
> >>>>>>>> JUnit in Action, Second Edition
> >>>>>>>> <https://www.amazon.com/gp/product/1935182021/ref=as_li_
> >>>>>>>> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182021&
> >>>>>>>> linkCode=as2&tag=garygregory-20&linkId=
> >>>>> 31ecd1f6b6d1eaf8886ac902a24de4
> >>>>>>> 18%22
> >>>>>>>>>
> >>>>>>>>
> >>>>>>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=
> >>>>> garygregory-20&l=am2&o=1&a=
> >>>>>>>> 1935182021>
> >>>>>>>> Spring Batch in Action
> >>>>>>>> <https://www.amazon.com/gp/product/1935182951/ref=as_li_
> >>>>>>>> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182951&
> >>>>>>>> linkCode=%7B%7BlinkCode%7D%7D&tag=garygregory-20&linkId=%7B%
> >>>>>>>> 7Blink_id%7D%7D%22%3ESpring+Batch+in+Action>
> >>>>>>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=
> >>>>> garygregory-20&l=am2&o=1&a=
> >>>>>>>> 1935182951>
> >>>>>>>> Blog: http://garygregory.wordpress.com
> >>>>>>>> Home: http://garygregory.com/
> >>>>>>>> Tweet! http://twitter.com/GaryGregory
> >>>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> --
> >>>>>>> Matt Sicker <boa...@gmail.com>
> >>>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> --
> >>>>>> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
> >>>>>> Java Persistence with Hibernate, Second Edition
> >>>>>> <https://www.amazon.com/gp/product/1617290459/ref=as_li_
> >>>>>> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1617290459&
> >>>>>> linkCode=as2&tag=garygregory-20&linkId=
> >> cadb800f39946ec62ea2b1af9fe6a2
> >>> b8>
> >>>>>>
> >>>>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=
> >> garygregory-20&l=am2&o=1&a=
> >>>>>> 1617290459>
> >>>>>> JUnit in Action, Second Edition
> >>>>>> <https://www.amazon.com/gp/product/1935182021/ref=as_li_
> >>>>>> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182021&
> >>>>>> linkCode=as2&tag=garygregory-20&linkId=
> >> 31ecd1f6b6d1eaf8886ac902a24de4
> >>>>> 18%22
> >>>>>>>
> >>>>>>
> >>>>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=
> >> garygregory-20&l=am2&o=1&a=
> >>>>>> 1935182021>
> >>>>>> Spring Batch in Action
> >>>>>> <https://www.amazon.com/gp/product/1935182951/ref=as_li_
> >>>>>> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182951&
> >>>>>> linkCode=%7B%7BlinkCode%7D%7D&tag=garygregory-20&linkId=%7B%
> >>>>>> 7Blink_id%7D%7D%22%3ESpring+Batch+in+Action>
> >>>>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=
> >> garygregory-20&l=am2&o=1&a=
> >>>>>> 1935182951>
> >>>>>> Blog: http://garygregory.wordpress.com
> >>>>>> Home: http://garygregory.com/
> >>>>>> Tweet! http://twitter.com/GaryGregory
> >>>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Matt Sicker <boa...@gmail.com>
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
> >>>> Java Persistence with Hibernate, Second Edition
> >>>> <https://www.amazon.com/gp/product/1617290459/ref=as_li_tl?
> >>> ie=UTF8&camp=1789&creative=9325&creativeASIN=1617290459&link
> >>> Code=as2&tag=garygregory-20&linkId=cadb800f39946ec62ea2b1af9fe6a2b8>
> >>>>
> >>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=
> >>> am2&o=1&a=1617290459>
> >>>> JUnit in Action, Second Edition
> >>>> <https://www.amazon.com/gp/product/1935182021/ref=as_li_tl?
> >>> ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182021&link
> >>> Code=as2&tag=garygregory-20&linkId=31ecd1f6b6d1eaf8886ac902a24de4
> 18%22>
> >>>>
> >>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=
> >>> am2&o=1&a=1935182021>
> >>>> Spring Batch in Action
> >>>> <https://www.amazon.com/gp/product/1935182951/ref=as_li_tl?
> >>> ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182951&link
> >>> Code=%7B%7BlinkCode%7D%7D&tag=garygregory-20&linkId=%7B%7Bli
> >>> nk_id%7D%7D%22%3ESpring+Batch+in+Action>
> >>>> <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=
> >>> am2&o=1&a=1935182951>
> >>>> Blog: http://garygregory.wordpress.com
> >>>> Home: http://garygregory.com/
> >>>> Tweet! http://twitter.com/GaryGregory
> >>>
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
> >>> For additional commands, e-mail: dev-h...@commons.apache.org
> >>>
> >>
> >
> >
> >
> > --
> > E-Mail: garydgreg...@gmail.com | ggreg...@apache.org
> > Java Persistence with Hibernate, Second Edition
> > <https://www.amazon.com/gp/product/1617290459/ref=as_li_
> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1617290459&
> linkCode=as2&tag=garygregory-20&linkId=cadb800f39946ec62ea2b1af9fe6a2b8>
> >
> > <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=am2&o=1&a=
> 1617290459>
> > JUnit in Action, Second Edition
> > <https://www.amazon.com/gp/product/1935182021/ref=as_li_
> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182021&
> linkCode=as2&tag=garygregory-20&linkId=31ecd1f6b6d1eaf8886ac902a24de418%22
> >
> >
> > <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=am2&o=1&a=
> 1935182021>
> > Spring Batch in Action
> > <https://www.amazon.com/gp/product/1935182951/ref=as_li_
> tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182951&
> linkCode=%7B%7BlinkCode%7D%7D&tag=garygregory-20&linkId=%7B%
> 7Blink_id%7D%7D%22%3ESpring+Batch+in+Action>
> > <http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=am2&o=1&a=
> 1935182951>
> > Blog: http://garygregory.wordpress.com
> > Home: http://garygregory.com/
> > Tweet! http://twitter.com/GaryGregory
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
> For additional commands, e-mail: dev-h...@commons.apache.org
>
>
--
Matt Sicker <boa...@gmail.com>
