http://wiki.apidesign.org/index.php?action=history&feed=atom&title=Either 2026-04-06T06:12:50Z Revision history for this page on the wiki MediaWiki 1.12.0rc1 http://wiki.apidesign.org/index.php?title=Either&diff=10691&oldid=prev 2025-01-09T12:52:49Z

<p>New page: I am a great supporter of <a href="/wiki/Checked_exception" title="Checked exception">checked exceptions</a>. Maybe not exactly as realized in <a href="/wiki/Java" class="mw-redirect" title="Java">Java</a>, but I believe the concept (after few homey touches) deserve to be love! <a href="/wiki/Scala" title="Scala">Scala</a> offers ***sc...</p> <p><b>New page</b></p><div>I am a great supporter of [[checked exception]]s. Maybe not exactly as realized in [[Java]], but I believe the concept (after few homey touches) deserve to be love!<br /> <br /> [[Scala]] offers ***scala.Either&lt;ReasonOfFailure, ReturnValue&gt;*** and I read somewhere an article favoring **Either** over [[JDK|java/util|Optional]] exactly for the reason that _None_/empty misses the reason why it is empty. Some might say, use **Either** then!<br /> <br /> However I believe that even better concept are [[checked exception]]s. Thus use [[checked exception]] to deliver *reason of failure* (that needs to be handled) and proper return value to deliver the real result.</div>

JaroslavTulach