This week's book giveaway is in the Reactive Progamming forum. We're giving away four copies of Reactive Streams in Java: Concurrency with RxJava, Reactor, and Akka Streams and have Adam Davis on-line! See this thread for details.
Uncaught TypeError: Cannot read property 'toString' of undefined
at arrToString (mainwindow.js?build=20191003175404:7091)
at arrToString (mainwindow.js?build=20191003175404:7086)
at functionLibrary.addRestoreClientInfo (mainwindow.js?build=20191003175404:7104)
at functionLibrary.doActionWithKey (Startup:433)
at doAH1 (SavedContext.fl?A.CTX=27:315)