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Java 8 is a giant step forward for the Java language. Writing this book has forced me to learn a lot more about it. In Project Lambda, Java gets a new closure syntax, method-references, and default methods on interfaces. It manages to add many of the features of functional languages wit...
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caveatInstead of memory snapshot, performance snapshot iscaptured automaticallyon application exit, if object allocation profiling was running. caveatThe option to record object allocations with "estimated" stacks has been removed. It often produced confusing and hard-to-interpret results. ...
Random forest uses a technique called bagging to build full decision trees in parallel from random bootstrap samples of the data set. The final prediction is an average of all of the decision tree predictions. The term “gradient boosting” comes from the idea of “boosting” or improving a ...
-combiner streaming Command or JavaClassName Combiner executable for map output. -inputreader For backward compatibility: specifies a record reader class instead of an input format class. -verbose Verbose output. -lazyOutput Creates output lazily. For example, if the output format is based on File...
Mostenterprise-grade databasesnow work on trigger-based mechanisms that run code in response to events and automatically record the changes that occur. This makes it possible to maintain a second system that can also run and track those events. Whenever a change occurs in the legacy system, con...
As a request navigates through a series of interconnected services, each service produces a span or record that details the operations executed. The span includes precise timestamps marking the start and end of each operation, along with importantmetadatathat provides context and insight into the pr...
AWS provides SDKs (software development kits) that consist of libraries and sample code for various programming languages and platforms (Java, Python, Ruby, .NET, iOS, Android, and so on). The AWS SDKs provide a convenient way to create programmatic access to S3 and AWS. Amazon S3 is a...
Get to know the Java persistence standard based on Hibernate and learn how to use JPA to store and manage Java objects in a relational or NoSQL database.