Diigo Diary 07/29/2008

• Optimizing regular expressions in Java – Java World

  tags: no_tag

  • If you will use a regular expression more than once in your program, be sure to compile the pattern using Pattern.compile() instead of the more direct Pattern.matches().
  • Also remember that you can re-use the Matcher object for different input strings by calling the method reset().
  • If you don’t really need to capture the text inside a
    group, always use non-capturing groups. For example, use “(?:X)” instead of “(X)“.

• Optimizing regular expressions in Java – Java World

  tags: no_tag

  • it would be better to use the reluctant quantifier “*?” and change the sub-expression to “.*?a“.
  • instead of using “a(.*)a“, it’s much better to use “a([^a]*)a“.

• 探索 OSGi 框架的组件运行机制

  tags: osgi, dw, article

• Subversion Articles – CollabNet Community

  tags: svn, article, merge

• Version Control with Subversion

  tags: svn, ebook, reference

• ISO 8583 – Wikipedia, the free encyclopedia

  tags: no_tag

  • ISO 8583 Standard for Financial Transaction Card Originated Messages – Interchange message specifications is the International Organization for Standardization standard for systems that exchange electronic transactions made by cardholders using payment cards.
  • The vast majority of transactions made at Automated Teller Machines use ISO 8583 at some point in the communication chain, as do transactions made when a customer uses a card to make a payment in a store.
  • Cardholder-originated transactions include purchase, withdrawal, deposit, refund, reversal, balance inquiry, payments and inter-account transfers. ISO 8583 also defines system-to-system messages for secure key exchanges, reconciliation of totals, and other administrative purposes.
  • Although ISO 8583 defines a common standard, it is not typically used directly by systems or networks. Instead, each network adapts the standard for its own use with custom fields and custom usages.