REBOL is a simple yet powerful programming language that allows developers to quickly build applications. It has several advantages including being small in size, not requiring many files or configurations, and being very easy to learn and use. Some key things that can be done with just a few lines of REBOL code include creating graphical user interfaces, downloading and parsing web pages, and networking tasks like port scanning. The document discusses both strengths and weaknesses of REBOL, and encourages programmers to try it for its simplicity and flexibility.
This document compares web technologies like Silverlight, Flash, and HTML5 for building rich internet applications. It outlines key features of Silverlight like its support for XAML, .NET integration, and cross-browser capabilities. Implementation details are discussed such as styles, controls, events, data binding and common patterns like MVC, MVVM and MEF. The document also covers Silverlight development tools and techniques.
This document summarizes a presentation by Tom Mellor on adopting agile and Scrum practices in China. Mellor is the Chair of the Board of Directors of the Scrum Alliance and introduced Scrum to a team of 5,000 people at his company. He discusses some common problems teams face, the core values and principles of agile according to the Agile Manifesto, and how Scrum works. He also outlines reasons why Scrum may not work and signs that it is not working well. The document concludes with a discussion on whether culture is the biggest obstacle to adopting agile in China.
Timothy Ng is the F# Lead at Microsoft Corporation. The document summarizes F#'s approach to parallelism and concurrency through tools like Visual F#, libraries like Parallel LINQ and Rx, and language features in F# like immutability and asynchronous workflows. It discusses challenges of shared state, code locality, I/O parallelism, and scaling to multiple machines that F# addresses through techniques like immutability, asynchronous workflows using async {...}, and agent-based programming. The summary concludes that F# with .NET 4.0 makes parallelism and asynchrony simple, powerful, and productive for both current and future use.
This document outlines a general product direction for connected clouds middleware and is intended for informational purposes only. It may not be incorporated into any contracts and does not commit Oracle to deliver any functionality. The document discusses making globally distributed stateful applications appear and operate as a single application across multiple cloud regions, providers and data centers. It also provides an agenda on challenges of multi-site deployments and introduces Oracle Coherence as a solution.
This document provides an overview of Groovy and its features. It discusses Groovy's origins as a dynamic language for the Java Virtual Machine (JVM) that aims to add productivity features like closures, builders and dynamic typing to Java. The document outlines topics to be covered, including leveraging Groovy's language features, design patterns, web services, domain specific languages, testing, polyglot programming, parallel processing and enterprise usage. Code examples are provided to demonstrate Groovy's syntax and capabilities.
This document discusses how traditional object-oriented programming practices and patterns may not directly apply to dynamic programming languages. It provides examples of how concepts like immutability, encapsulation, and testing are different in dynamic languages that support features like duck typing, metaprogramming, and runtime changes. The document advocates expressing intent clearly through interfaces and composition over rigid patterns and hierarchies when using dynamic languages. It also notes tradeoffs with IDE support when using dynamic features.
The document discusses the importance of standards, specifications, and conformance testing. It notes that specifications alone are not enough to ensure interoperability - implementations also need to be tested against specifications to identify failures to conform. An effective test suite called a Technology Compatibility Kit (TCK) tests implementations against requirements in the specification. The document provides best practices for developing high-quality TCKs that promote specification quality and compatible implementations.
The document summarizes how Twitter handles and analyzes big data in real-time. It discusses how tweets, timelines, social graphs, and search indices are stored and processed. Tweets are partitioned and indexed to support high throughput. Timelines are pre-computed offline but cached for low latency. Social graphs store connections in both directions to support complex queries efficiently.
The document discusses Facebook's use and scaling of memcache. It describes how Facebook grew from a single server at Harvard to connecting users worldwide. As growth continued, memcache was used to cache frequently accessed data across thousands of servers. Engineering challenges included handling interconnected user data, parallelizing requests, congestion from connections, and maintaining consistency across data centers.
62. Input IBM Amit CEP Architecture
Output
Input Definition Mgr Action
Mgr Mgr
Input
Plug-in
Adapter
Input Routing Mgr Plug-in
Adapter
Output
Mgr
Context and Model Based Rule Engine
Listener
Listener
User Recovery Persistence
DB DB DB