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Java 9 - useful commands to inspect Module

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List modules\ 1 2 $ java --list-modules $ java --list-modules java.base

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0. Never, ever use null for an Optional variable.\ Optional should be only used as a return value.\ never use it for a field in Class an...

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1 2 3 $ docker log <container id> // show logs $ docker port <container id> // show port mapping $ docker inspect <container id> // inspect...

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1 2 3 4 5 6 7 8 9 10 11 public void completionService(ExecutorService executor) { CompletionService<CustomTaskResult> completionService = n...

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Angular 2 Development with TypeScript