筆記與流年

a platform for widget developing.

浏览器之间不同程度的事件支持情况，会加重编写跨浏览器的开发成本。而在某种“无奈”的情况下（特别针对 IE），我们都会采用浏览器嗅探来决定绑定不同的事件

传统的文件同步方案有rsync(单向) 和 unison(双向)等，它们需要扫描所有文件后进行比对，差量传输。如果文件数量达到了百万甚至千万量级，扫描所有文件将非常耗时。而且正在发生变化的往往是其中很少的一部分，这是非常低效的方式。

The Python API for the AllegroGraph system is a client-side API that implements convenient and efficient access to an AllegroGraph server from a Python-based application. This API consciously imitates the structure and functionality of the (Java-based) Sesame Repository API. It offers methods for querying and updating RDF data, and for managing the stored triples.

AllegroGraph RDFStore is a modern, high-performance, persistent RDF graph database. AllegroGraph uses disk-based storage, enabling it to scale to billions of triples while maintaining superior performance. AllegroGraph supports SPARQL, RDFS++, and Prolog reasoning from Java applications.

RabbitMQ is an implementation of AMQP, the emerging standard for high performance enterprise messaging.

ruby binding for UserService on GAE

ruby binding for DataStore on GAE

ruby binding for UrlFetch on GAE

ruby binding for MailService on GAE

An Exceptionally Simple Theory of Everything is a preprint proposing a basis for a unified field theory, named E8 Theory,[1] which attempts to describe all known fundamental interactions in physics, and to stand as a possible theory of everything. The preprint was posted to the physics arXiv by Antony Garrett Lisi in November 2007,[2] and has not been published in a formally peer-reviewed scientific journal. The title is a pun on the algebra used, the Lie algebra of the largest "simple," "exceptional" Lie group, E8.

A Hylomorphism is just the composition of one catamorphism and then one anamorphism.

Catamorphisms is the way that we can explain in one function how recursive patterns works in some data type.

diff 程序能报告两个文件间的差异，并把这些差异用一个从任一文件变化到另一文件的列表表示出来。diff 能在合理的时间和空间内对某些典型的输入（比如由计算机维护或生成的文档之间的版本变动）进行检查。在真实测试中，时空利用率随文件的总长度而不同，但已经知道在最坏情况下会是这些文件长度的乘积。

diff的中心算法解决了最长公共子串问题，并将其用来找出不同文件间没有变化的行。通过匹配文件间某些关键的“候选词（candidate）”可以获得具有实用性的效率，这些候选词把文档打断，缩短了两个文件间原始片段的最长公共子串

Open Publication Distribution System (OPDS) an application of the Atom Syndication Format intended to enable content creators and distributors to distribute digital books via a simple catalog format.

Omaha, otherwise known as Google Update, is a program to install requested software and keep it up to date.