{"id":5303,"date":"2016-11-27T21:35:02","date_gmt":"2016-11-27T21:35:02","guid":{"rendered":"http:\/\/www.garysieling.com\/blog\/?p=5303"},"modified":"2016-11-27T21:35:02","modified_gmt":"2016-11-27T21:35:02","slug":"fixing-error-edu-stanford-nlp-ling-corelabel-cannot-cast-scala-runtime-nothing","status":"publish","type":"post","link":"https:\/\/www.garysieling.com\/blog\/fixing-error-edu-stanford-nlp-ling-corelabel-cannot-cast-scala-runtime-nothing\/","title":{"rendered":"Fixing error:  edu.stanford.nlp.ling.CoreLabel cannot be cast to scala.runtime.Nothing$"},"content":{"rendered":"<p>In Scala, you can get an error like this:<\/p>\n<pre>\nedu.stanford.nlp.ling.CoreLabel cannot be cast to scala.runtime.Nothing$\n<\/pre>\n<p>E.g.:<\/p>\n<pre lang=\"scala\">\nval types =\n  results.map(\n    (res) => {\n      res.map(\n        (label) => label.asInstanceOf[CoreLabel].category()\n      )\n    }\n  )\n<\/pre>\n<pre>\nException in thread \"main\" java.lang.ClassCastException: edu.stanford.nlp.ling.CoreLabel cannot be cast to scala.runtime.Nothing$\n\tat scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)\n\tat scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)\n\tat scala.collection.Iterator$class.foreach(Iterator.scala:727)\n\tat scala.collection.AbstractIterator.foreach(Iterator.scala:1157)\n\tat scala.collection.IterableLike$class.foreach(IterableLike.scala:72)\n\tat scala.collection.AbstractIterable.foreach(Iterable.scala:54)\n\tat scala.collection.TraversableLike$class.map(TraversableLike.scala:244)\n\tat scala.collection.AbstractTraversable.map(Traversable.scala:105)\n\tat Speaker$.$anonfun$main$3(Speaker.scala:65)\n\tat scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)\n\tat scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)\n\tat scala.collection.Iterator$class.foreach(Iterator.scala:727)\n\tat scala.collection.AbstractIterator.foreach(Iterator.scala:1157)\n\tat scala.collection.IterableLike$class.foreach(IterableLike.scala:72)\n\tat scala.collection.AbstractIterable.foreach(Iterable.scala:54)\n\tat scala.collection.TraversableLike$class.map(TraversableLike.scala:244)\n\tat scala.collection.AbstractTraversable.map(Traversable.scala:105)\n\tat Speaker$.$anonfun$main$2(Speaker.scala:63)\n\tat Speaker$.$anonfun$main$2$adapted(Speaker.scala:43)\n\tat scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)\n\tat scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)\n\tat scala.collection.immutable.List.foreach(List.scala:318)\n\tat scala.collection.TraversableLike$class.map(TraversableLike.scala:244)\n\tat scala.collection.AbstractTraversable.map(Traversable.scala:105)\n\tat Speaker$.main(Speaker.scala:42)\n\tat Speaker.main(Speaker.scala)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)\n<\/pre>\n<p>I found that this was fixable by converting the list to an array first:<\/p>\n<pre lang=\"scala\">\nval types =\n  results.map(\n    (res) => {\n      res.toArray().map(\n        (label) => label.asInstanceOf[CoreLabel].category()\n      )\n    }\n  )\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Fixing a class cast error in Scala<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[9],"tags":[480],"aioseo_notices":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/posts\/5303"}],"collection":[{"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/comments?post=5303"}],"version-history":[{"count":0,"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/posts\/5303\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/media?parent=5303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/categories?post=5303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.garysieling.com\/blog\/wp-json\/wp\/v2\/tags?post=5303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}